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标题: 【每日逻辑练习第二季】【1-7】 [打印本页]

作者: UlysessHope 时间: 2011-11-26 10:23
标题: 【每日逻辑练习第二季】【1-7】
朋友们，实在抱歉，最近照相&体检&验血&看病号同学&考试搀和在一起了，忙得记错了额（= =| 我记得是今天原来记错了）
大家加油哦！
点击查看跟帖做题方法
【精练】谢谢小意达de花儿啦~~~

（啊。。前几天重装电脑发现不能复制字体了只能截图，待我在研究研究，下次改成文字版 >_<）
Loggerhead turtles live and breed in distinct groups, of which some are in the Pacific Ocean and some are in the Atlantic. New evidence suggests that juvenile Pacific loggerheads that feed near the Baja Peninsula hatch in Japanese waters 10,000 kilometers away. Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from turtles at the Japanese nesting sites.
Which one of the following, if true, most seriously weakens the reasoning above?

(A) Nesting sites of loggerhead turtles have been found the Pacific coast of North America Several thousand kilometers north of the Baja peninsula.
(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers.
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant.
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles.
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years.
【逻辑链】
25. (30261-!-item-!-188;#058&004144)
Twelve years ago and again five years ago, there were extended periods when the Darfir Republic's currency, the pundra, was weak: its value was unusually low relative to the world's most stable currencies. Both times a weak pundra made Darfir's manufactured products a bargain on world markets, and Darfir's exports were up substantially. Now some politicians are saying that, in order to cause another similarly sized increase in exports, the government should allow the pundra to become weak again.
Which of the following, if true, provides the government with the strongest grounds to doubt that the politicians' recommendation, if followed, will achieve its aim?
(A) Several of the politicians now recommending that the pundra be allowed to become weak made that same recommendation before each of the last two periods of currency weakness.
(B) After several decades of operating well below peak capacity, Darfir's manufacturing sector is now operating at near-peak levels.
(C) The economy of a country experiencing a rise in exports will become healthier only if the country's currency is strong or the rise in exports is significant.
(D) Those countries whose manufactured products compete with Darfir's on the world market all currently have stable currencies.
(E) A sharp improvement in the efficiency of Darfir's manufacturing plants would make Darfir's products a bargain on world markets even without any weakening of the pundra relative to other currencies.
26. (31045-!-item-!-188;#058&004365)
The population of Megacity, a sprawling metropolis in Remsland, has grown at a fairly steady rate for over a century. A hundred years ago, poor sanitation in the city caused high mortality rates among the city's inhabitants, and what fueled the population increase was immigration from rural villages. This immigration has continued and even increased. Moreover, in recent decades, city sanitation has improved enormously. Yet the city's population growth has not significantly accelerated.
Which of the following, if true, most helps to explain why the city's population growth rate has not changed?
(A) Mortality rates that were associated with poor sanitation in Megacity a hundred years ago were orders of magnitude higher than are mortality rates associated with vehicular traffic, which is currently a major cause of death in the city.
(B) For several decades, Megacity, as distinct from the countryside, has had a steadily declining birth rate.
(C) Cities smaller than Megacity have also experienced sustained population growth.
(D) The great majority of immigrants to Remsland settle in Megacity, at least initially.
(E) Megacity has long offered better employment prospects than most rural areas.
27. (31231-!-item-!-188;#058&004411)
Plant scientists have used genetic engineering on seeds to produce crop plants that are highly resistant to insect damage. Unfortunately, the seeds themselves are quite expensive, and the plants require more fertilizer and water to grow well than normal ones. Thus, for most farmers the savings on pesticides would not compensate for the higher seed costs and the cost of additional fertilizer. However, since consumer demand for grains, fruits, and vegetables grown without the use of pesticides continues to rise, the use of genetically engineered seeds of this kind is likely to become widespread.
In the argument given, the two portions in boldface play which of the following roles?
(A) The first supplies a context for the argument; the second is the argument's main conclusion.
(B) The first introduces a development that the argument predicts will have a certain outcome; the second is a state of affairs that the argument denies will be part of that outcome.
(C) The first presents a development that the argument predicts will have a certain outcome; the second acknowledges a consideration that weighs against that prediction.
(D) The first provides evidence to support a prediction that the argument seeks to defend; the second is that prediction.
(E) The first and the second each provide evidence to support the argument's main conclusion.
28. (31510-!-item-!-188;#058&004526)
First-time computer buyers buying PXC home computers typically buy models that cost much less and have a smaller profit margin per computer than do PXC computers bought by people replacing their computers with more powerful models. Last year PXC's profits from computer sales were substantially higher than the previous year, although about the same number of PXC computers were sold and the prices and profit margins for each computer model that PXC sells remained unchanged.
If the statements above are true, which of the following is most strongly supported by them?
(A) PXC's competitors raised the prices on their computers last year, making PXC computers more attractive to first-time computer buyers.
(B) The number of people buying PXC computers who also bought PXC computer-related products, such as printers, was larger last year than the previous year.
(C) Among computer buyers who bought a PXC computer to replace their existing computer, the proportion who were replacing a computer made by a competitor of PXC was greater last year than the previous year.
(D) The proportion of PXC computers bought by first-time computer buyers was smaller last year than the previous year.
(E) PXC's production costs for its computers were lower last year than they had been the previous year.

作者: UlysessHope 时间: 2011-11-26 10:24
【逻辑链KEY】 BBCD
【精练解释】
[attachimg=724,595]93543[/attachimg]

作者: zz42050524 时间: 2011-11-26 10:40
占位，今天才把6给做了~~

作者: 小意达de花儿 时间: 2011-11-26 10:46
1. 虽然做对了，但是感觉不好，云里雾里的
LT live and breed in distinct groups: some are in PO and some are in A
Juvenile PO LT feed near B hatch in J waters 10,000 km away
95% of DNA of B turtles match DNA of J turtles
I guess: 95% is insufficient, maybe 98% of the DNA samples taken from the B turtles match those taken from A LT
(A) Nesting sites of loggerhead turtles have been found the Pacific coast of North America several thousand kilometers north of the Baja peninsula.
Irrelevant
(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers.
Useless comparison
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant.
This choice confused me at the first sight, but hatchlings in J have been declining in number & nesting sites near B has remained constant
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles.
Correct, Atlantic LT live far away from the Baja Peninsula, but the similarity of DNA is also 95%
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years.
Irrelevant
------------------------------------------------------------------------------------------------
2. 12 years ago and 5 years ago, when D’s currency----the pundra---- was weak, the D’s exports were up substantially.
CONCLUSION: In order to gain another similarity size increase in exports, the government should allow pundra to become weak again.
I guess: think about the disadvantages; today is quite different from those days
(A) Several of the politicians now recommending that the pundra be allowed to become weak made that same recommendation before each of the last two periods of currency weakness.
I think this choice may support the argument.
(B) After several decades of operating well below peak capacity, Darfir's manufacturing sector is now operating at near-peak levels.
Correct, the manufacturing sector is at peak, even though the government weak the currency, there is no more extra increase.
(C) The economy of a country experiencing a rise in exports will become healthier only if the country's currency is strong or the rise in exports is significant.
Irrelevant, because we do not talk about the health of economy
(D) Those countries whose manufactured products compete with Darfir's on the world market all currently have stable currencies.
Irrelevant comparison
(E) A sharp improvement in the efficiency of Darfir's manufacturing plants would make Darfir's products a bargain on world markets even without any weakening of the pundra relative to other currencies.
Irrelevant, because we still don’t know what would happen, if the government weak the currency.
--------------------------------------------------------------------------------------------------------------------------------------------------
3.The population of has grown at a fairly steady rate for over a century.
100 years ago, poor sanitation in the city cause high mortality rates, and immigration from rural villages fueled the population increase
The immigration has continue and city sanitation has improved
BUT the city’s population has not increased significantly
I guess: Other reasons now cause high mortality rates(A) Mortality rates that were associated with poor sanitation in Megacity a hundred years ago were orders of magnitude higher than are mortality rates associated with vehicular traffic, which is currently a major cause of death in the city.
This choice confused me at the first sight, but we should pay attention to the word ‘currently’, however, in the original text, it is ‘recent decades’
(B) For several decades, Megacity, as distinct from the countryside, has had a steadily declining birth rate.
Correct
(C) Cities smaller than Megacity have also experienced sustained population growth.
Cannot explain
(D) The great majority of immigrants to Remsland settle in Megacity, at least initially.
Irrelevant
(E) Megacity has long offered better employment prospects than most rural areas.
Irrelevant to the employment prospects, and this choice may give more confusion why the population does not increase significantly.
--------------------------------------------------------------------------------------------------------------------------------------------------
4. Scientists have produced crop plants that are resistant to insect damage.
BUT these plants require more fertilizer and water----evidence of a conclusion, which this argument disproves.
Hence these plants cannot save money for farmers
BUT since consumer demand for pesticides-free crops is rising, the use of these seeds is likely to become widespread.----Conclusion
(A) The first supplies a context for the argument; the second is the argument's main conclusion.
(B) The first introduces a development that the argument predicts will have a certain outcome; the second is a state of affairs that the argument denies will be part of that outcome.
(C) The first presents a development that the argument predicts will have a certain outcome; the second acknowledges a consideration that weighs against that prediction.
Correct
(D) The first provides evidence to support a prediction that the argument seeks to defend; the second is that prediction.
(E) The first and the second each provide evidence to support the argument's main conclusion.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
5. Background: First-time computer buyers usually buy models that cost less and have a smaller profit margin than computers bought by people replacing their computers with more powerful models.
Last year PXC’s computer sales were higher than the previous year.
Although same number of computer were sold and prices and profit margins for each computer model that PXC sells remained unchanged.
I GUESS: this year more customers of PXC is people who want to replace their computers.
(A) PXC's competitors raised the prices on their computers last year, making PXC computers more attractive to first-time computer buyers.
If this is true, then the number of computers sole by PXC last year should increase.
(B) The number of people buying PXC computers who also bought PXC computer-related products, such as printers, was larger last year than the previous year.
Here we talk about the profits from computer sales
(C) Among computer buyers who bought a PXC computer to replace their existing computer, the proportion who were replacing a computer made by a competitor of PXC was greater last year than the previous year.
We don’t know the total number of people who by PXC computer to replace their computers
(D) The proportion of PXC computers bought by first-time computer buyers was smaller last year than the previous year.
Correct, because the total number of computer sold by PXC remained unchanged.
(E) PXC's production costs for its computers were lower last year than they had been the previous year.
The price and profit margin do not change

作者: 小意达de花儿 时间: 2011-11-26 10:58
手打的精练题，刚才做题的时候顺便打的，楼主把这个贴上去吧
Loggerhead turtles live and breed in distinct groups, of which some are in the Pacific Ocean and some are in the Atlantic. New evidence suggests that juvenile Pacific loggerheads that feed near the Baja Peninsula hatch in Japanese waters 10,000 kilometers away. Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from turtles at the Japanese nesting sites.

Which one of the following, if true, most seriously weakens the reasoning above?

(A) Nesting sites of loggerhead turtles have been found the Pacific coast of North America Several thousand kilometers north of the Baja peninsula.

(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers.

(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant.

(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles.

(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years.

作者: xeyyxzty 时间: 2011-11-26 12:03
1.没有原题只有手打...background information: loggerhead turtles live and breed in distinct groups--Pacific/Atlantic
premise:95% of DNA samples match in the two places.
conclusion:juvenile Pacific loggerheads that feed near Baja hatch in Japanese waters
the match in DNA is not persuasive~
A--nesting sites--irrelevant
B--Atlantic loggerheads--irrelevant
C--nesting sites--irrelevant
D--so turtles are all have the match of 95%--weaken--right
E--commercial aquariums--irrelevant
2.background information:Twelve years ago and again five years ago, there were extended periods when the Darfir Republic's currency, the pundra, was weak: its value was unusually low relative to the world's most stable currencies. Both times a weak pundra made Darfir's manufactured products a bargain on world markets, and Darfir's exports were up substantially.
premise: the government should allow the pundra to become weak again
conclusion: another similarly sized increase in exports
the pundra become weak and other currencies do not change-->a increase in export
what if when pundra's value decrease, other currencies also decrease their value?
or is there any change in the economic structure during the last five years?
(A) Several of the politicians now recommending that the pundra be allowed to become weak made that same recommendation before each of the last two periods of currency weakness.
--support
(B) After several decades of operating well below peak capacity, Darfir's manufacturing sector is now operating at near-peak levels.
--there is no space to have a increase in export--weaken--right
(C) The economy of a country experiencing a rise in exports will become healthier only if the country's currency is strong or the rise in exports is significant.
--irrelevant to the export
(D) Those countries whose manufactured products compete with Darfir's on the world market all currently have stable currencies.
--support
(E) A sharp improvement in the efficiency of Darfir's manufacturing plants would make Darfir's products a bargain on world markets even without any weakening of the pundra relative to other currencies.
--a improvement in the efficiency--irrelevant
OK，思路错误
3.set of facts
The population of Megacity, a sprawling metropolis in Remsland, has grown at a fairly steady rate for over a century.
A hundred years ago, poor sanitation in the city caused high mortality rates among the city's inhabitants,
and what fueled the population increase was immigration from rural villages.
This immigration has continued and even increased.
Moreover, in recent decades, city sanitation has improved enormously.
Yet the city's population growth has not significantly accelerated.
Which of the following, if true, most helps to explain why the city's population growth rate has not changed?is there anything else that influence the population? such as immigration to other cities?
(A) Mortality rates that were associated with poor sanitation in Megacity a hundred years ago were orders of magnitude higher than are mortality rates associated with vehicular traffic, which is currently a major cause of death in the city.
--the population should increase
(B) For several decades, Megacity, as distinct from the countryside, has had a steadily declining birth rate.
--right
(C) Cities smaller than Megacity have also experienced sustained population growth.
--other cities--irrelevant
(D) The great majority of immigrants to Remsland settle in Megacity, at least initially.
--the population should increase
(E) Megacity has long offered better employment prospects than most rural areas.
--employment-irrelevant
4.background information(concessions):Plant scientists have used genetic engineering on seeds to produce crop plants that are highly resistant to insect damage. Unfortunately, the seeds themselves are quite expensive, and the plants require more fertilizer and water to grow well than normal ones. Thus, for most farmers the savings on pesticides would not compensate for the higher seed costs and the cost of additional fertilizer.
premise:However, since consumer demand for grains, fruits, and vegetables grown without the use of pesticides continues to rise,
conclusion:the use of genetically engineered seeds of this kind is likely to become widespread.
(A) The first supplies a context for the argument; the second is the argument's main conclusion.
--right
(B) The first introduces a development that the argument predicts will have a certain outcome; the second is a state of affairs that the argument denies will be part of that outcome.
--the second--opposite
(C) The first presents a development that the argument predicts will have a certain outcome; the second acknowledges a consideration that weighs against that prediction.
--the second is a prediction--right
(D) The first provides evidence to support a prediction that the argument seeks to defend; the second is that prediction.
the first weaken the prediction
(E) The first and the second each provide evidence to support the argument's main conclusion.
--the first is not
5.background information:First-time computer buyers buying PXC home computers typically buy models that cost much less and have a smaller profit margin per computer than do PXC computers bought by people replacing their computers with more powerful models.
premise:about the same number of PXC computers were sold and the prices and profit margins for each computer model that PXC sells remained unchanged.
conclusion:Last year PXC's profits from computer sales were substantially higher than the previous year
the number didn't change doesn't mean the percentage of each groups didn't change
(A) PXC's competitors raised the prices on their computers last year, making PXC computers more attractive to first-time computer buyers.
--there should be a decrease in profits--weaken
(B) The number of people buying PXC computers who also bought PXC computer-related products, such as printers, was larger last year than the previous year.
--computer-related products--irrelevant
(C) Among computer buyers who bought a PXC computer to replace their existing computer, the proportion who were replacing a computer made by a competitor of PXC was greater last year than the previous year.
--irrelevant
(D) The proportion of PXC computers bought by first-time computer buyers was smaller last year than the previous year.
-support--right
(E) PXC's production costs for its computers were lower last year than they had been the previous year.
--irrelevant

作者: bananazoo 时间: 2011-11-26 14:11
占位，晚上回来做~

作者: qiuhua01234567 时间: 2011-11-26 17:53
标题: 做得忍不住想骂人
占位，今天跑了一天，待会来补
1Weaken 25S

Background：T live and breed in distinct groups，p and A

Premise：95 percent take from B match that take from T in J

Conclusion：JP feed near B in japanese water 10000 kilometer

(A) Nesting sites of loggerhead turtles have abeen found the Pacific coast of North America Several thousand kilometers north of the Baja peninsula.

--------------------------------------------------------------------------------------------------irrelevent
(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers.

--------------------------------------------------------------------------------------------------------irrelevent
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant.

----------------------------------------------------------------------------------------------------------irrelevent
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles.

----------------------------------------------------------------------------------------------------------correct
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years.

--------------------------------------------------------------------------------------------------------------irrelevent

2.32S,weaken

1background:Twelve years ago and again five years ago, there were extended periods when the Darfir Republic
's currency, the pundra, was weak: its value was unusually low relative to the world's most stable currencies. Both times a weak pundra made Darfir's manufactured products a bargain on world markets, and Darfir's exports were up substantially
Premise: the government should allow the pundra to become weak again.

Conclusion: cause another similarly sized increase in exports

(A)Several of the politicians now recommending that the pundra be allowed to become weak made that same recommendation before each of the last two periods of currency weakness.
(B) After several decades of operating well below peak capacity, Darfir's manufacturing sector is now operating at near-peak levels.
(C) The economy of a country experiencing a rise in exports will become healthier only if the country's currency is strong or the rise in exports is significant.
(D) Those countries whose manufactured products compete with Darfir's on the world market all currently have stable currencies.
(E) A sharp improvement in the efficiency of Darfir's manufacturing plants would make Darfir's products a bargain on world markets even without any weakening of the pundra relative to other currencies.

1.explation 31S

background: The population of Megacity, a sprawling metropolis in Remsland, has grown at a fairly steady rate for over a century. A hundred years ago, poor sanitation in the city caused high mortality rates among the city's inhabitants, and what fueled the population increase was immigration from rural villages

premise: This immigration has continued and even increased. Moreover, in recent decades, city sanitation has improved enormously.

Conclusion: city's population growth has not significantly accelerated

(A)Mortality rates that were associated with poor sanitation in Megacity a hundred years ago were orders of magnitude higher than are mortality rates associated with vehicular traffic, which is currently a major cause of death in the city.

----------------------------------------------------------------------------------------------------------------correct
(B) For several decades, Megacity, as distinct from the countryside, has had a steadily declining birth rate.

---------------------------------------------------------------------------------------------------------------weaken
(C) Cities smaller than Megacity have also experienced sustained population growth.

----------------------------------------------------------------------------------------------------------------irrelevent
(D) The great majority of immigrants to Remsland settle in Megacity, at least initially.

------------------------------------------------------------------------------------------------------------------irrelevent
(E) Megacity has long offered better employment prospects than most rural areas.

--------------------------------------------------------------------------------------------------------------------irrelevnt

A是错的，只是说了主要的死亡，没有说明死亡人数巨大。Irrelevent

2.blodface 30S

(A) The first supplies a context for the argument; the second is the argument's main conclusion.
(B) The first introduces a development that the argument predicts will have a certain outcome; the second is a state of affairs that the argument denies will be part of that outcome.
(C) The first presents a development that the argument predicts will have a certain outcome; the second acknowledges a consideration that weighs against that prediction.
(D) The first provides evidence to support a prediction that the argument seeks to defend; the second is that prediction.
(E) The first and the second each provide evidence to support the argument's main conclusion.

Still confusion

3.support

background: First-time computer buyers buying PXC home computers typically buy models that cost much less and have a smaller profit margin per computer than do PXC computers bought by people replacing their computers with more powerful models

premise: PXC's profits from computer sales were substantially higher than the previous year

conclusion: although about the same number of PXC computers were sold and the prices and profit margins for each computer model that PXC sells remained unchanged.

(A)PXC's competitors raised the prices on their computers last year, making PXC computers more attractive to first-time computer buyers.

------------------------------------------------------------------------------------------------------weaken
(B) The number of people buying PXC computers who also bought PXC computer-related products, such as printers, was larger last year than the previous year.

--------------------------------------------------------------------------------------------------------irrelevent
(C) Among computer buyers who bought a PXC computer to replace their existing computer, the proportion who were replacing a computer made by a competitor of PXC was greater last year than the previous year.

aa--------------------------------------------------------------------------------------------------correct
(D) The proportion of PXC computers bought by first-time computer buyers was smaller last year than the previous year.

-----------------------------------------------------------------------------------------------------weaken
(E) PXC's production costs for its computers were lower last year than they had been the previous year.

---------------------------------------------------------------------------------------------------weaken

作者: winghyy 时间: 2011-11-26 18:14
精炼题
1. 〉90s（看了很久，找不到逻辑关系) -weaken
BG: L turtles live and breed in distinctive group, some in Pacific and some are in the Atlantic.
Premise: New evidence suggests that juvenile turtles that feed near BP hatch in JP waters.
Conclusion: 95% of the DNA taken from the Baja turtles match those taken from turtles at the JP.
Prephase: 完全无感。。。
D
(A) Nesting sites of loggerhead turtles have been found the Pacific coast of North America Several thousand kilometers north of the Baja peninsula.
没有提及DNA，无关
(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers.
没有提及DNA，无关
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant.
数量的比较，和DNA无关
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles.
提到了DNA，不过如何weaken不清楚。。。
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years.
Commercial aquariums无关

原来是conclusion和premise找反了
Premise: 95% of the DNA taken from the Baja turtles match those taken from turtles at the JP.
Conclusion: juvenile turtles that feed near BP hatch in JP waters 10，000 away.
选项C原来这么tricky, 都没看明白：the number of hatchlings in JP vs the number of nesting sites near the Baja
选项D weaken 说明Baja的turtle和Atlantic的turtle也share 95% DNA, 削弱

作者: winghyy 时间: 2011-11-26 20:49
逻辑链
25. 60s-weaken
BG:The currency of D is weak. The value of pundra was low relative to the global stable currencies.
Premise: The weak currency made the D export up.
Conclusion: some politicians suggest allow the pundra become weak again in order to cause an increase in exports.
Prephase: The weak currency will have a negative effect on the future export.
选B

26. 49s-explain
BG :The population of M remains relatively stable for over a century. 100 years ago, the population sharply declined becase of the high morality caused by the poor sanitation. What fueled the population increae was immigration from rural areas.
Premise: Now the sanitation is getting better in the city.
Conclusion: Yet the city's population growth has not significantly accelerated.
Prephase: New generation perfer to be DINKers.
选B

27.60s- boldface
BG: A new kind of plants has been developed. It is highly resistant to insect damage. Unfortunately, the saving on the peticade would not compnate for the high cost of the seeds and fertilizers.
Premise: The consumers perfer grains and vegetables without pesticides
Conclusion:The use of the seed will become widespread.
Prephase: 1st-subpremise for subconclusion
2nd-premise and conclusion
选C （B的后半句的意思不是很清楚）

28. 55s-support
Premise: First-time users buy low-price models for PXC computers, while people who replace their computers will buy high-price models.
Conclusion: Last year PXC's profits from computer sales were higher than the previous year, although the number of PXC computers were sold remained unchanged.
Prephase: Last year, the percentage of consumers who replaced the computer is higher than the previous year.
选D

作者: trackofheart 时间: 2011-11-26 21:29
占位。。。

作者: Jane412 时间: 2011-11-26 23:26
精练{weaken}
time;22''
premise: L turtles live in two places. one is P and the other is A
premise: 95% DNA samples taken from the B turtles = those taken from turtles at J nesting sites
conclusion: PL hatch in J

既然L在两个地方，所以有可能提出的J地的DNA是出自另一组在A的turtle

(A) Nesting sites of loggerhead turtles have been found the Pacific coast of North America Several thousand kilometers north of the Baja
peninsula.
--------------------筑巢的地方离B很远，但没有否认P地的turtle在J筑巢
(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers.
--------------------irrelevant。A地turtle feed和hatch的距离不能weaken，因为题目说的是B turtle。
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant.
--------------------数量减少并不能否认p地turtle在J地筑巢的事儿--->number of sites 数量不变不能说明问题
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles.
---------------------bingo~
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years.
---------------------irrelevant。和在不在J筑巢无关。

作者: zz42050524 时间: 2011-11-27 11:23
2011/11/27
精炼 weaken 40s
P: LHT lives in PO and in A, breed in distinct groups. 95% DNA samples from Baja turtles are match those from Japanese turtles.
C: P turtles are feed in Baja and hatch in Japan.
Pre: All LHT’ DNA are match at least 95%.

(A) Nesting sites of loggerhead turtles have been found the Pacific coast of North America Several thousand kilometers north of the Baja peninsula. 无关，文中距离只是说地点
(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers. 无关
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant.
这个选项很有迷惑性，但是declining的只是waters 和turtles无关
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles. 这个是答案，提出了另一个可能。
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years. 无关

逻辑链：
2. weaken 50s
P：The low value of B makes the country’s products a bargain in world market and makes the manufacture industry developed. To develop the manufacture industry further,
C: The government should make the B low value.
Pre: World market is different, low value of currency can not promote industry development.
E,预测偏离了，容易选成B，这道题需要去看看解析。

3. support 50s
P: City X had a steady rate in population growth even it had a high mortality rate, because immigrations increased.
The sanitation has improved and the immigrations even increased faster.
C: The population is not increased high.
Pre:1. People from City X settle in other city increases sharply.
2. Because of some other reasons, the mortality doesn’t change.
A ,预测的2

4. Method in reasoning 60s
背景: new genetic crops ——他的优点和缺点——转折，需求很大——这种genetic crops能普及
C：不知道对不对 A有些像，但是不够准确

5. Must be true 44s
P: Selling a PXC have a lower profit than replacing a old one for a new model.
Selling One< replacing One ————profit
Profit last year

rofit this year (much higher)
Selling consistent
Replacing vary
C 找变量就好

作者: 风无衣 时间: 2011-11-27 20:21
【精炼1-7】
weaken_46s
background information:some kind of turtle live and breed in distinct groups,some in Pacific Ocean,some in the Atlantic.
premise:95% of DNA samples in Baja match those of turtles in Japanese nesting sites
conclusion:Baja turtles hatch in Japanese waters 10000 km away

(A) Nesting sites of loggerhead turtles have been found the Pacific coast of North America Several thousand kilometers north of the Baja peninsula.——irrelevant
(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers.——irrelevant about Atlantic loggerhead
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant.——irrelevant
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles.——correct
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years. ——irrelevant

I choose D because I think that it is highly possible that Atlantic loggerheads hatch in Japanese waters.These kinds of turtles all match 95% of DNA samples with each other. So this choice weakens the argument.
貌似今天的思维要清楚一点点了~哎哎~
hatch：孵化

作者: fox0923 时间: 2011-11-28 03:35
精炼-------------------1‘02“-----------------------------weaken
B: The pacific turtles feed near the B. hatch in japanese waters.
P: Loggerhead turtles live and breed in different groups.
C: 95% of DNA samples collected from B turtles match those turtles from the Japanese nesting sites.
Prephrase: Loggerhead turtles' DNA does not match the those turtles from the japanese nesting sites.(实在想不出来用什么weaken了）
Analysis:
(A) Nesting sites of loggerhead turtles have been found the Pacific coast of North America Several thousand kilometers north of the Baja peninsula.
----------pacific这个地方的turtles和B这个地方离的多远属于无关选项。
(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers.
----------the distance between these two sites is irrelevant.
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant.
----------turtles from japanese waters下降，而靠近B的这个地方的turtles却是一样的数量，并不能证明DNA的变化。
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles.
----------证明95% of the DNA samples和Atlantic turtles也是一样的。虽然对了，但是逻辑关系搞错了~~~囧`
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years.
----------irrelevant

题目一上来最难找的就是conclusion。
Loggerhead turtles live and breed in distinct groups, of which some are in the Pacific Ocean and some are in the Atlantic.（明显定位为背景信息） New evidence suggests that juvenile Pacific loggerheads that feed near the Baja Peninsula hatch in Japanese waters 10,000 kilometers away.（这句话竟然是conclusion，我上来看到了evidence就定位了premise） Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from turtles at the Japanese nesting sites.（这句话才是premise，好混乱的说~~~）
谁能给解释一下为什么new evidence suggests是conclusion?怎么推出来的?

作者: 风无衣 时间: 2011-11-28 22:21

精炼-------------------1‘02“-----------------------------weaken
B: The pacific turtles feed near the B. hatch in japanese waters.
P: Loggerhead turtles live and breed in different groups.
C: 95% of DNA samples collected from B turtles match those turtles from the Japanese nesting sites.
Prephrase: Loggerhead turtles' DNA does not match the those turtles from the japanese nesting sites.(实在想不出来用什么weaken了）
Analysis:
(A) Nesting sites of loggerhead turtles have been found the Pacific coast of North America Several thousand kilometers north of the Baja peninsula.
----------pacific这个地方的turtles和B这个地方离的多远属于无关选项。
(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers.
----------the distance between these two sites is irrelevant.
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant.
----------turtles from japanese waters下降，而靠近B的这个地方的turtles却是一样的数量，并不能证明DNA的变化。
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles.
----------证明95% of the DNA samples和Atlantic turtles也是一样的。虽然对了，但是逻辑关系搞错了~~~囧`
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years.
----------irrelevant

题目一上来最难找的就是conclusion。
Loggerhead turtles live and breed in distinct groups, of which some are in the Pacific Ocean and some are in the Atlantic.（明显定位为背景信息）New evidence suggests that juvenile Pacific loggerheads that feed near the Baja Peninsula hatch in Japanese waters 10,000 kilometers away.（这句话竟然是conclusion，我上来看到了evidence就定位了premise）Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from turtles at the Japanese nesting sites.（这句话才是premise，好混乱的说~~~）
谁能给解释一下为什么new evidence suggests是conclusion?怎么推出来的?

-- by 会员 fox0923 (2011/11/28 3:35:19)

fox~~~其中我多么想跟你说下我的想法~无奈在我写了50分钟过后，我发现我想表达的东西是混乱的~啊~~~抓狂~~~

接下来的东西你将就看一下吧~我感觉都要被我自己绕进去了~今天脑袋已经完全不转了~哎哎~

推理：Baja turtles 95%的DNA样本与日本nesting sites里面turtles的DNA相符合~
所以：（在Baja附近feed的）年幼的Pacific loggerheads在10000公里远的日本海域孵化。
因为二者DNA样本高度相似——所以推断Pacific loggerheads跑到日本海域去下蛋了。

反过来：如果因为Pacific loggerheads跑到日本海域去下蛋——怎么能够推出Baja turtle和日本nesting sites里面turtle的DNA样本95%相似呢？难道就因为去下了个蛋，然后就DNA高度相似啦？
举个不恰当的例子哈：一个A1跑到美国去生孩子了，当然不能推出结论A1在中国生的娃与在美国生的娃DNA高度相似。（爹都可能不一样呢~）
如果说知道一个A1在中国的生的娃与在美国的生的娃DNA高度相似，那么我们可以合理推测其实是A1跑到美国去生娃了~
答案的意思就是可能是A2跑到美国去生娃了（A1和A2是亲姐妹，DNA高度相似）（好猥琐的例子。。。捂脸飘走了。。。）
我感觉不能用一个陈述的事实去推断一个含有统计性意义的结论。
我越发的凌乱的~其实就说自己想的到~说不清楚~哎哎~你将就看一下~说说你的想法嘛~再讨论哈~

作者: ugly5552000 时间: 2011-11-28 23:16
1、Background: loggerhead turtles live and breed in the Pacific Ocean and Atlantic. There is new evidence shows that Pacific loggerheads hatch in Japanese waters.
Premise: 95% of the DNA samples taken from the Baja turtles match those taken from turtles at the Japanese nesting sites.
Prephrase: the turtles nesting in Japan and Baja turtles are the offspring of the same ancestor.

D
A: irrelevant
B: it is about Baja turtles, not Atlantic loggerhead turtles
C: nesting sites, irrelevant
D: if Baja turtles share a similarity of 95% DNA of other kind of turtles, it then can not be proved that Baja turtles hatch in Japanese water.
E: irrelevant
2、Background: Darfir’s weak currency made its exports up substantially.
Premise: in order to cause another similarly sized increase in exports, the government should allow the currency become weak again.
Prephrase: the revenue of exports cannot cover the cost.

B
A: the answer supports the politician’s argument.
B: Darfir’s manufacturing sector is now operating at near-peak levels, does this mean that there is no need to enlarge exports by weakening currency?
C: the answer supports the argument in a certain extent.
D: irrelevant
E: this is an assumption, not a fact, it could not be used as the base to doubt the argument.
3、Background: a hundred years ago, it was the immigration from rural villages that fueled the Megacity’s population which suffered from high mortality rates due to the poor sanitation.
Prephrase: in the period when city’s sanitation has improved enormously, the rural villages’ sanitation does, either. Many inhabitants in city immigrate to rural villages.
B
A: although traffic accident is a major cause of death in the city, if the number of accidents is low, it cannot block the increase of population
B: correct, a steadily declining birth rate results in a slow increase of population
C: irrelevant
D: irrelevant
E: irrelevant
4、Background: new seeds which resistant to insect damage exist. Because of the high price, most farmers do not choose them. However, since consumers’ demand of non-pesticided plants continues to rise, the new seeds are widespread.
C
5、Background: the profit gotten from first-time computer buyers is less than that from PXC computer users.
Premise: last year, PXC’s profit increased impressively, while the number of computers sold and the prices and profit margins remained unchanged.
Prephrase: last year, more PXC computers users bought new models to replace the old one.
D
A: the prices are unchanged
B: the profits from computers sale are different from those from the printers sale
C: what is the proportion is very small?
D: the number of sold computers is fixed, when the number of first buyers decreases, the revenue increases.
E: if the cost changes, the profit margin will change.

作者: fox0923 时间: 2011-11-28 23:25

-- by 会员 fox0923 (2011/11/28 3:35:19)

fox~~~其中我多么想跟你说下我的想法~无奈在我写了50分钟过后，我发现我想表达的东西是混乱的~啊~~~抓狂~~~

-- by 会员风无衣 (2011/11/28 22:21:24)

风无衣总结的已经很好了，其实我就是应该用这种推理方法把premise-conclusion联起来看来测试谁是conclusion，谢谢你啊，虽然例子有点搞笑，不过清楚易懂就是目的拉，不畏缩拉~~

作者: ugly5552000 时间: 2011-11-28 23:25

-- by 会员 fox0923 (2011/11/28 3:35:19)

fox~~~其中我多么想跟你说下我的想法~无奈在我写了50分钟过后，我发现我想表达的东西是混乱的~啊~~~抓狂~~~

-- by 会员风无衣 (2011/11/28 22:21:24)

题目的意思是因为BJ海龟和J海龟有着95%的相同的DNA，所以推断出BJ海龟跑到日本海域去繁殖去了，貌似你给理解反了

作者: balapupu 时间: 2011-11-28 23:27
精练：
P：L turtles live and bread in distinct groups, some in Po, some in A?evidence:
The L turtles feed in B and hatch in Japanese. -->96% The DNA form the B is the same as the DNA from the Japanese
Waken: the same kind of turtles will have the same DNA no matter where they live..
A:
(A) Nesting sites of loggerhead turtles have been
found off the Pacific coast of North America
several thousand kilometers north of the Baja
peninsula.-->irrelevant with other places
(B) The distance between nesting sites and feeding
sites of Atlantic loggerhead turtles is less
than 5,000 kilometers.-->we can not guarantee the L turtles are the same in different places.
(C) Loggerhead hatchlings in Japanese waters have
been declining in number for the last decade
while the number of nesting sites near the
Baja peninsula has remained constant.-->irrelevant with the number
(D) Ninety-five percent of the DNA samples taken
from the Baja turtles match those taken from
Atlantic loggerhead turtles.-->R
(E) Commercial aquariums have been successfully
breeding Atlantic loggerheads with Pacific?irrelevant with the breeding.

1.[34s]
P: five years ago, the D’s currency value is lower than the world market value?this brought the export increase of the D
C: in order to increase the export, the D should take the measure to lower the currency value.
Weaken: the D currency is already lower than the world market value.
A:
(A) Several of the politicians now recommending that the pundra be allowed to become weak made that same recommendation before each of the last two periods of currency levant weakness.-->irrelevant with the recommendation time.
(B) After several decades of operating well below peak capacity, Darfir's manufacturing sector is now operating at near-peak levels.-->R
(C) The economy of a country experiencing a rise in exports will become healthier only if the country's currency is strong or the rise in exports is significant.-->because ”or….”support
(D) Those countries whose manufactured products compete with Darfir's on the world market all currently have stable currencies.-->support
(E) A sharp improvement in the efficiency of Darfir's manufacturing plants would make Darfir's other currencies.-->provide another solution but not refute the recommendation.

2.[29s]
P: poor sanitation environment+ immigration from the rural are-?the population increase in M.
Recent years, the sanitation environment is improved + more immigration ?the population increase is not improved.
Explain: more and more people in the M choose not to have baby.
A:
(A) Mortality rates that were associated with poor sanitation in Megacity a hundred years ago were orders of magnitude higher than are mortality rates associated with vehicular traffic, which is currently a major cause of death in the city.—>deepen the paradox
(B) For several decades, Megacity, as distinct from the countryside, has had a steadily declining birth rate.-->R
(C) Cities smaller than Megacity have also experienced sustained population growth.-->irrelevant with other cities
(D) The great majority of immigrants to Remsland settle in Megacity, at least initially.-->deepen the paradox
(E) Megacity has long offered better employment prospects than most rural areas.-->deepen the paradox.

3.[35s]
P :scientists invent the genetic resistant crops?the seed of this crops is expensive and fertilizer is also expensive?the money farmer saved from the pesticide will compensate the money to buy new crop seed and fertilizer?however, because the consumer prefer to buy food without pesticide, the new crops still have a large market.
A:A[C选项的意思木有明白啊。。。]
4.[27s]
P: the margin and the profits of the model of the PXC is lower than the powerful model of the PXC.-->last year, the profits of the PXC Increased, however, the number of the PXC selled and the each model margin is not changed.
Explain: more people buy the powerful model.
A:
(A) PXC's competitors raised the prices on their computers last year, making PXC computers more attractive to first-time computer buyers.-->irrelevant with the competitor.
(B) The number of people buying PXC computers who also bought PXC computer-related products, such as printers, was larger last year than the previous year.-->pay attention the scope mention in the passage?computer sales.
(C) Among computer buyers who bought a PXC computer to replace their existing computer, the proportion who were replacing a computer made by a competitor of PXC was greater last year than the previous year.-->the total sale is not change.
(D) The proportion of PXC computers bought by first-time computer buyers was smaller last year than the previous year.--.R
(E) PXC's production costs for its computers were lower last year than they had been the previous year.-->irrelevant with the information in the passage.

作者: 风无衣 时间: 2011-11-30 17:13

-- by 会员 fox0923 (2011/11/28 3:35:19)

fox~~~其中我多么想跟你说下我的想法~无奈在我写了50分钟过后，我发现我想表达的东西是混乱的~啊~~~抓狂~~~

-- by 会员风无衣 (2011/11/28 22:21:24)

-- by 会员 fox0923 (2011/11/28 23:25:29)

吼吼~昨天学校停电断网~就木有上CD来做题~哎~
哈哈~我发现我纠结了一个小时的事情你一句话就搞定了，就是要用推理方法去判断到底啥子是conclusion~嘻嘻~
例子是浮云~飘过飘过啊~哈哈~

作者: 风无衣 时间: 2011-11-30 17:16

-- by 会员 fox0923 (2011/11/28 3:35:19)

fox~~~其中我多么想跟你说下我的想法~无奈在我写了50分钟过后，我发现我想表达的东西是混乱的~啊~~~抓狂~~~

-- by 会员风无衣 (2011/11/28 22:21:24)

题目的意思是因为BJ海龟和J海龟有着95%的相同的DNA，所以推断出BJ海龟跑到日本海域去繁殖去了，貌似你给理解反了

-- by 会员 ugly5552000 (2011/11/28 23:25:42)

不会吧？！~我咋感觉我就是写的：因为二者DNA样本高度相似——所以推断Pacific loggerheads跑到日本海域去下蛋了。
额。。。我接下来写的那一大段加那个猥琐的例子只是想要跟fox解释为什么推理不是反过来~嘻嘻~我推理应该是没错的~

作者: lan0604 时间: 2012-2-19 10:53
精炼：
01：06
weaken
Loggerhead turtles live and breed in distinct groups, of which some are in the Pacific Ocean and some are in the Atlantic. New evidence suggests that juvenile Pacific loggerheads that feed near the Baja Peninsula hatch in Japanese waters 10,000 kilometers away. Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from turtles at the Japanese nesting sites.
Which one of the following, if true, most seriously weakens the reasoning above?

(A) Nesting sites of loggerhead turtles have been found the Pacific coast of North America Several thousand kilometers north of the Baja peninsula.
(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers.
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant.
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles.
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years.

逻辑链：
25
00:51
weaken
pundra become weak--->increase in exports
C应该是B
Twelve years ago and again five years ago, there were extended periods when the Darfir Republic's currency, the pundra, was weak: its value was unusually low relative to the world's most stable currencies. Both times a weak pundra made Darfir's manufactured products a bargain on world markets, and Darfir's exports were up substantially. Now some politicians are saying that, in order to cause another similarly sized increase in exports, the government should allow the pundra to become weak again.
Which of the following, if true, provides the government with the strongest grounds to doubt that the politicians' recommendation, if followed, will achieve its aim?
(A) Several of the politicians now recommending that the pundra be allowed to become weak made that same recommendation before each of the last two periods of currency weakness.
(B) After several decades of operating well below peak capacity, Darfir's manufacturing sector is now operating at near-peak levels.
(C) The economy of a country experiencing a rise in exports will become healthier only if the country's currency is strong or the rise in exports is significant.
(D) Those countries whose manufactured products compete with Darfir's on the world market all currently have stable currencies.
(E) A sharp improvement in the efficiency of Darfir's manufacturing plants would make Darfir's products a bargain on world markets even without any weakening

26
00:36
paradox
sanitation decrease, population decrease
rural people move, population increase
however, sanitation improve, population stable
B

27
00:37
boldface
A应该是C
Plant scientists have used genetic engineering on seeds to produce crop plants that are highly resistant to insect damage. Unfortunately, the seeds themselves are quite expensive, and the plants require more fertilizer and water to grow well than normal ones. Thus, for most farmers the savings on pesticides would not compensate for the higher seed costs and the cost of additional fertilizer. However, since consumer demand for grains, fruits, and vegetables grown without the use of pesticides continues to rise, the use of genetically engineered seeds of this kind is likely to become widespread.
In the argument given, the two portions in boldface play which of the following roles?
(A) The first supplies a context for the argument; the second is the argument's main conclusion.
(B) The first introduces a development that the argument predicts will have a certain outcome; the second is a state of affairs that the argument denies will be part of that outcome.
(C) The first presents a development that the argument predicts will have a certain outcome; the second acknowledges a consideration that weighs against that prediction.
(D) The first provides evidence to support a prediction that the argument seeks to defend; the second is that prediction.
(E) The first and the second each provide evidence to support the argument's main conclusion.

28
01:02
support
C应该是D
First-time computer buyers buying PXC home computers typically buy models that cost much less and have a smaller profit margin per computer than do PXC computers bought by people replacing their computers with more powerful models. Last year PXC's profits from computer sales were substantially higher than the previous year, although about the same number of PXC computers were sold and the prices and profit margins for each computer model that PXC sells remained unchanged.
If the statements above are true, which of the following is most strongly supported by them?
(A) PXC's competitors raised the prices on their computers last year, making PXC computers more attractive to first-time computer buyers.
(B) The number of people buying PXC computers who also bought PXC computer-related products, such as printers, was larger last year than the previous year.
(C) Among computer buyers who bought a PXC computer to replace their existing computer, the proportion who were replacing a computer made by a competitor of PXC was greater last year than the previous year.
(D) The proportion of PXC computers bought by first-time computer buyers was smaller last year than the previous year.
(E) PXC's production costs for its computers were lower last year than they had been the previous year.

作者: Roxas605 时间: 2012-4-5 21:08
MD、、、

错这么多，同想骂人。。。今天真是一点状态都没有么？？！！！！好累啊～～～

作者: leewonting 时间: 2012-4-6 02:11
44
背景：Loggerhead turtles live and breed in distinct groups, of which some are in the Pacific Ocean and some are in the Atlantic.
条件：95% of the DNA samples taken from the Baja turtles match those taken from turtles at the Japanese nesting sites
结论：Juvenile Pacific loggerheads that feed near the Baja Peninsula hatch in Japanese waters 10000 kilometers away
推测：即使DNA高度相似，也未必是从BAJA到JAPAN的
选D，BAJA的与ATLANTIC的基因也高达95%相似，不能证明上面的。
A，   irrelevant
B，   举了一个特例，ATLANTIC的生产和生活的地区仅差5000km，那是不是全部都是这样呢？而且反驳不到基因相似性这个证据
C，   如果题目说的是对的，那么两个地区应该是同增同减的
E， irrelevant

45
背景：There were two times that the currency was unusually low
条件：Both times a weak pundra made Darfir’s manufactured products a bargain on world markets and Darfir’s exports were up substantially
结论：In order to increase exportation, government should allow the pundra to become weak again
推测：出口最大化，除了货币贬值之外，还有什么影响因素？工厂的生产率？或者是即使货币再次贬值，也不能引起出口更多
A，   strengthen
B，   weaken，现在已经是生产的最高值，在怎么贬低货币都不能提高生产
C，   irrelevant，出现了healthy
D，   irrelevant
E，   irrelevant，即使不需要货币贬值，只要生产能力提升一点，就能够具备出口优势，但这个选项未知，或者weaking the currency能让技术提升

46
背景：For over a century, the population of Megacity has grown at fairly steady rate
条件：The immigration from rural villages has continued and the sanitation has improved
结论：解释
推测：人们的观念改变？或者更多的人去了其他的地方？
选B，出生率下降+移民率上述=人口稳定

47
背景：
条件：
结论：
推测：
选C，黑体中间的那句是prediction

48
First-time computer buyers buying PXC home computers typically buy models that cost much less and have a smaller profit margin per computer than do PXC computers bought by people replacing their computers with more powerful models. Last year PXC's profits from computer sales were substantially higher than the previous year, although about the same number of PXC computers were sold and the prices and profit margins for each computer model that PXC sells remained unchanged.
If the statements above are true, which of the following is most strongly supported by them?
(A) PXC's competitors raised the prices on their computers last year, making PXC computers more attractive to first-time computer buyers.
(B) The number of people buying PXC computers who also bought PXC computer-related products, such as printers, was larger last year than the previous year.
(C) Among computer buyers who bought a PXC computer to replace their existing computer, the proportion who were replacing a computer made by a competitor of PXC was greater last year than the previous year.
(D) The proportion of PXC computers bought by first-time computer buyers was smaller last year than the previous year.
(E) PXC's production costs for its computers were lower last year than they had been the previous year.
背景：第一次买PXC电脑的人买便宜的models，而换的人买比较贵的
条件：profit increased but the number of people buying and the prices are stable
结论：解释
推测：换电脑配件的人多了？
选C，换电脑的人多了
应该选D，首先C错在选取的总体为换电脑的人，不是全部消费的人，所以指代错误！！！（要看清楚选项啊）

作者: Rena张 时间: 2012-4-10 16:15
这逻辑链最近老是力不从心啊~~~肿么老要错那么多呢~~sigh~~~桑心……
---------------
1.
Time: 1'13''
Premise: (这stimulus有点绕啊~sigh。。。) B的和J的DNA有95%的match.
feed near B的turtle是在Japanese waters孵化的。-----这个应该是conclusion。
Type: weaken
Prephrase: 因为他们都同属turtle，所以至少有95%的DNA是相同的，他们的区别在于那5%不同的DNA。
Choice: D
2.
Time: 1'18''
Premise: D的P was weak. ---->exports up.
Conclusion: in order to cause similarly sized increase in exports<----allow P to become weak again.
Type: doubt
Choice: E B
3.
Time: 1'03''
Premise: poor Sanitation---> high mortality rates.
Immigrants ---> increased the population.
Sanitation has improved enormously---> Yet the population growth has not accelerated.
Type: explain
Choice: A B
4.
Time: 50''
Type: BF
Choice: C

作者: dwindwin1106 时间: 2012-5-5 03:31
做个记号先，要请假4天，之后补上

作者: FB小贝 时间: 2012-5-5 09:58
7.【精练】P

NA from Baja turtles match that of Japanese nesting sites.
C:juvenile Pacific loggerheads that feed near the BP hatch in JP.
Weaken:
a.无关 b. 无关 c.sites, hatchings, 无关比较 d.weaken e.无关
1.P. weak pundra made D’s products a bargin
C: allow pundra to become weak again will increase exports in a similarly size
Weaken: will not cause a increase, or not the similarly size
a.irrelevant b.correct, will not increase c.irrelevant to the health of the economy
d.irrelevant with other countries e.irrelevant

2.phonomenon: city sanitation improved, immigration increased, but population growth not accelerated
Explain: another reason that cause the decrease in population
a.irrelevant b.correct c.irrelevant d.相反 e.irrelevant

3. an evidence that counter the argument, the argument
a.not a context b.incorrect c.correct d.incorrect e.incorrect

4.P: first buyers of PXC buy models that a cheap, while people replacing their computers buy more powerful models
Profits higer, same number
Explain: 替换电脑的人更多了
a. irrelevant b.irrelevant c. incorrect d.correct e.irrelevant

作者: dwindwin1106 时间: 2012-5-10 07:31
(1)P

L turtles (feed in BP) hatch in Japanese waters
P:95% DNA samples from L turtles in BP = DNA from L turtles in Japanese.
C

turtles live and breed in different groups, some in the Pacific ocean and some in the Atlantic.
Weaken: the same species share the similar DNA
Answer: D
A.irrelevant ------ nesting site虽然离BP很远，但是对质疑BP和Japanese的turtles是否是同一组turtle没有帮助
B.irrelevant ------ the topic is that L turtles live and breed in different groups, the distance between two sites does nothing to weaken the argument.
C.Irrelevant ------ nesting sites的减少并不能说明turtles的减少或增加
D.Correct ------ L turtles share the similar DNA
E.Irrelevant

(2)P:12 and 5 years ago, D’s currency (the pundra) was weak ? made D’s products a bargain on world market ?D’s exports ↑
C:now, to cause another similarly sized exports ↑, the government should allow the pundra to become weak.
weaken: allowing pundra to become weak cannot increase exportation
Answer: B
A.Irrelevant
B.Correct ------ 是否是因为，题目是要质疑若建议实施是否会达到目的，制造业现已接近顶峰值，即使货币贬值也不能增加其产量或效率，所以这个建议会失败
C.Irrelevant
D.Irrelevant
E.Irrelevant

(3)F:population in M has grown at a fairly steady rate of over a century
F:100 years ago, poor sanitation ? high mortality rates
F: immigration from rural villages ?increase the population, the immigration has continued and increased.
F:sanitation has improved
F:population growth has not significantly accelerated.
Solve: most people who immigrate to M are old people who cannot increase the birth rate
Answer: B
A.Irrelevant
B.correct
C.Irrelevant
D.Irrelevant
E.Irrelevant

(4)F:g e seeds can produce crops that are highly resistant to insect damage
F:g e seed are expensive and need more fertilizer and water ?savings on pesticide < costs of seed and additional fertilizer
C:since demand for crops without pesticides continues to rise, g e seeds are likely to become widespread
Boldface
Answer: C
A.irrrelevant
B.irrelevant
C.correct
D.irrelevant
E.irrelevant

(5)F:first time computer buyers (第一次购买的人) buying PXC h c buy models that cost less and have smaller profit margins/c than PXC c brought by people replacing c with more powerful models （升级电脑的人）do
F

XC profits from c sales: last year > the previous year, although the same number were sold and profit margins for each c model that PXC sells remained same.
must be true: people who replace c increase
Answer: D
A.Irrelevant
B.Irrelevant
C.irrelevant
D.Correct
E.irrelevant

作者: spencerX 时间: 2012-5-16 17:29
精练：
Background：有些海龟live and breed in P，有些在A
Premise：在B的幼年海龟的基因sample和在Japan发现的幼年海龟的基因有95%相同
Conclusion: 幼年在B长大的P海龟是在10,000公里以外的J被养出来的。
Prepharse：有证据证明不是在B的海龟是在A养出来的；sample取样的范围有问题。
Analysis：
A. Irrelevant
B.结论讨论的是P的海龟，和A的海龟没有关系
C.如果两者的数量之间有必然的联系，那么说明很有可能幼年的在B长大的P海龟就是在A被养出来的。这个选项有support的意思。
D.正确。这个选项说明研究时选择的sample是不全面的。
E. Irrelevant

逻辑链：
25.
Background：D的货币是weak的。并且由于这个原因，D在出口方面很有优势。
Premise：（politician）继续使D的货币贬值
Conclusion：可以使D的出口增加和过去一样的量。
Prephrase：继续贬值之后，出口并没有增加；过去的经验不能和现在相类比
Analysis:
A.就算以前也建议过，并不能当初实行贬值是因为他们建议了，政府就做了。就算原来成功了，并不能表明现在也会同样成功。
B.正确，如果生产能力已经达到peak，那么就算需求再大，供给也更不上。
C. Irrelevant。出口经济是不是健康不是这个argument讨论的问题。
D.无关类比。别的国家的经验不足以证明D也会这样。
E. Irrelevant
26.
Background: R的一个城市M的人口数量增加。这些增加主要是外来移民，因为M的居民由于疾病而死了很多。
Paradox：移民数量仍然在增加，而且M的卫生条件也改善了，但是M的人口却没有迅速增加。
Prephrase：城市原来的居民死亡率增加；许多M的人离开了城市
Analysis：
A. Irrelevant
B.正确，如果出生率降低了，那么哪怕死亡率减少，或者移民数量增加，总的人口数量可能会减少。
C. Irrelevant
D. Irrelevant
E. Irrelevant
27.
Background: 科学家研发了对虫害有高度抵抗力的crop
Premise：
这种改变基因的crop很贵，而且需要更多的fertilizer和water，所以农民用于杀虫剂、肥料和水的钱小于买抗虫的crop
对于这种不需要杀虫剂的crop的需求量增加
Conclusion：这种转基因的crop会迅速增加
Prephrase：第一个是反Premise，第二个中前部分是premise，后部分是conclusion
Analysis：？
我选了D,好像没有一个选项是符合我的prephrase？感觉都不对…
选D是因为我觉得作者是想defend这个观点：转基因的crop会有很大的市场。
选C是不是因为作者在前面只是说农民肥料什么方面省下的前还不足以买新的品种的crop，并没有说这种crop是不能widespread的，所以从本质上来说，并不是和结论相反，只是一种prediction？求解答！！
28.
Background: 第一次买P电脑的人比除第一次购买的人更喜欢买便宜的。
Fact：P电脑的总销量和利润都没有改变，但是总收入却上升了。
Prephrase：第一次买P的人的数量减少了。
Analysis：
A.如果是这样，在总的销售额没有改变的情况下，总收入应该降低。
B. Irrelevant
C. Irrelevant
D.正确，如果是这样，因为不是第一次购买的人所购买的P电脑的价格比较贵，那么在销售数量不变的情况下，销售额是会增加的。
E．已经说了profit margins和price没有改变了，这种质疑前提本身的选项一定是错误选项。

作者: baseboss 时间: 2012-5-20 18:52
1.L turtles live and breed in distinct group,some in Pacific,some in Atalantic.L live and feed place has the distance 10000 km.95% DNA match.
presume:
1.domestication

(A) Nesting sites of loggerhead turtles have been found the Pacific coast of North America Several thousand kilometers north of the Baja peninsula.
Irrelevant
(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers.
Irrelevant
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant.
weaken
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles.
Irrelevant
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years.
Irrelevant

2Weak currency good for export.
presume:
weak currency will effect the improt,and will effect the civic life.
E

3 Bad sanitation popolation reduce and a lot of immigration instead.
Now sanitation good,popolation not increase.
presume
the city has the capacity to serve for all the civic people.
B

4 presume:
1.weaken the conclusion.
2.support the conclusion
c

5 sale first-time computer has less margin than updating the computer by powful models.
profil and magin no change but sales increase a lot.
presume
more people updating powful models than buy first-time computer with typical model.
D

作者: 卖红薯a 时间: 2012-5-20 21:22
精练
1)计时：45s
2)逻辑链Situation
Background information: LT live and breed in P Ocean and A Ocean.
Premise: new evidence: young P LT that feed near B hatch in Japanese waters 10,000km away.
Conclusion: B LTs’ DNA 95% =(match) Japanese nesting sites LTs’ DNA
3)推测: Japanese nesting sites ≠ in Japanese waters 10,000km away
4)选项分析：选A
A. Right.
B. Irrelevant. A Ocean LT
C. Irrelevant. evolutionary history
D. Irrelevant. A Ocean LT
E. Irrelevant. aquarium

【逻辑链】
25.
1)计时：60s
2)逻辑链Situation
Background information: 25 years ago, pundra’s value was low VS world’s currencies
Premise: twice low value currency----? cheap products on world markets/ big exports
Conclusion: politicians say: government should let pundra weak again, in order to ↑another export increase
3)推测: it may lead to anti-dumping----? worse than now
4)选项分析：选C
A.？
B. Irrelevant.
C. Right.
D. Irrelevant. others’ currencies
E. Irrelevant. main point is the low/high level of currency not the bargain

26.
1)计时：44s
2)逻辑链Situation
Background information: M’s population grows big for more than 100 years now.
Premise: 100 years ago, poor sanitation-----? high mortality in urban, immigration from rural ↑population again.
Conclusion: recently, city sanitation ↑----?city’s population doesn’t grow much
3)推测: sth. else influence the growth of population: people’s desire of having a baby (or they don’t want a baby)
4)选项分析：选B
A. Support. But not the most helpful ?
B. Right.
C. Irrelevant. other cities
D. Support. same as A choice
E. Irrelevant. influent if people want to live here, not direct influence

27.
1)计时：67s
2)逻辑链Situation
1st sentence: (background info) There’re a kind of seeds resistant to insect damage.
2ed sentence: (further explanation of the seeds) But the seeds are expensive, and the plants need more fertilizer/water.
3rd sentence: (conclusion of if farmers will buy the seeds) less money on pesticides, but much more money on seeds/etc
4th sentence: (prediction) the seeds might be widespread since consumer demand more non-pesticide foods
3)选项分析：选D

28.
1)计时：48s
2)逻辑链Situation
Background information: 1st time buyer typically buy “PXC home” models, cost much less/ a smaller profit margin VS buy “PXC” replacing with more powerful models
Premise: last year, PXC’s profits from sales were higher than before.
Conclusion: although with the same quantity/ prices/ profit margin for each model
3)推测: more ads, etc
4)选项分析：选E
A. Irrelevant. rivals’ price↑
B. sell more related products
C. Opposite.
D. Opposite. The quantity didn’t change.
E. Right.
几天做题下来感觉都不好，决定快速通读bible

作者: Threesu 时间: 2012-5-26 11:13
B:longgerhead turtles live in two places A and B.
P:The DNA sample is ninety-five percent similar from A to B

(A) Nesting sites of loggerhead turtles have been found the Pacific coast of North America Several thousand kilometers north of the Baja peninsula.--we
(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers.
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant.---irrelevant
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles.---irrelevant
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years.

没弄清楚情况一开始，发现要记住出现的每一个名字

B

weak-bargain in manufactured industry-economy development
C

should be weak again to regain the power
(A) Several of the politicians now recommending that the pundra be allowed to become weak made that same recommendation before each of the last two periods of currency weakness.--I
(B) After several decades of operating well below peak capacity, Darfir's manufacturing sector is now operating at near-peak levels.---weaken
(C) The economy of a country experiencing a rise in exports will become healthier only if the country's currency is strong or the rise in exports is significant.---contradiction
(D) Those countries whose manufactured products compete with Darfir's on the world market all currently have stable currencies.---support
(E) A sharp improvement in the efficiency of Darfir's manufacturing plants would make Darfir's products a bargain on world markets even without any weakening of the pundra relative to other currencies.---irrelevant

B:the population growth rate is stable-the sanitation is improved-more immigration coming from rural places
C:why the population growth rate is stable
(A) Mortality rates that were associated with poor sanitation in Megacity a hundred years ago were orders of magnitude higher than are mortality rates associated with vehicular traffic, which is currently a major cause of death in the city.
(B) For several decades, Megacity, as distinct from the countryside, has had a steadily declining birth rate.---support
(C) Cities smaller than Megacity have also experienced sustained population growth.---irrelevant
(D) The great majority of immigrants to Remsland settle in Megacity, at least initially.---
(E) Megacity has long offered better employment prospects than most rural areas.

B:

作者: 二楼往下掉 时间: 2012-6-2 00:29
1.天哪，我这第一题翻来覆去看了好久才看明白说的是啥意思。。。这可怎么办。。。到时候考试argument看不懂可咋整！！！
（1）30s weaken
（2）逻辑链
Fact:
<1>LT live and breed in PC & A.
<2>

T was feed in BP & hatch in Japan 95% DNA similar to BT taken from Japan
Conclusion:
Juvenile Pacific loggerheads that feed near the Baja Peninsula hatch in Japanese waters 10,000 kilometers away
（3）<1>95%不足够说明他们是同一生物
<2>研究表明，LT这种生物不会出现feed 和hatch隔这么远距离的情况
（4）argument中使用在Japan海中nest中的turtle的DNA与B海中的turtle进行比对，得到他们是一个物种的结论，证明turtle是在B海feed Japan hatch的。
A:意图通过说明turtle也会在NA hatch，但A中没有提到任何关于DNA的问题，loser
B：意图通过类比说明在P中的turtle不会在feed和hatch间隔10000km，但由于举得是AT这个地方LT的例子，因而是错误类比，loser
C：无关比较，将Japan的hatch与B海的nest sites进行对比，loser
D：说明95%的相似度不足够证明B海中的turtle和Japan nest里的是一个品种，contender
E：无关选项，没有提到任何关于DNA和B海中turtle的信息，loser
所以：D正确

2.
（1）45s weaken
（2）逻辑链
Background：
20 & 5 years ago, two times the pundra was weak
primes:
Weak pundra —> increase in manufactured products
Conclusion:
In order to increase the export<— allow the pundra to become weak again
（3）那两次虽然export增加，但是由于pundra was weak，D实际上是亏损很多的
（4）A：意图证明这个recommendation是有效地？loser
B：意图证明即使不使pundra weak again，export也会增加，contender
C：与goal没什么关系，loser
D：other countries跟D国的goal无关，loser
E：另一种增加export的途径，好方法！contender
所以，B只是说到了manufacturing sector的操作，E跟与argument中提到的goal相关，所以E正确
正确答案是B，为啥呢？

3.
（1）45s explain
（2）逻辑链
100 years ago, poor sanitation —> high mortality among the city’s inhabitants—>immigration from rural fueled the population increase
Recent decades, city sanitation improved enormously —/—>population growth
（3）<1>周围rural的人都搬得差不多了
<2>年轻人都不愿意要很多个孩子
（4）A：认为将mortality rates与不良卫生环境的关系比与交通事故的关系要大，loser
B：M地的出生率下降，可以解释为什么卫生条件变好了，但是人口增量下降了，contender
C：无关比较，对于argument没有影响，loser
D：无关，loser
E：如果E正确，M的人口增量应该增加，loser
所以，B正确

4.
（1）45s boldface
（2）逻辑链
Seed expensive & require more fertilizer and water—>farmer prefer pesticide
Consumer prefer products without pesticide—> seed widespread
（3）选E
正确答案，C；黑脸的题应该怎么做呢？

5.
（1）45s must be true
（2）逻辑链
<1>First-time cost much less & smaller profit per computer than replace with more powerful one
<2>Last years, profit higher than before——number of computers sales unchanged & each computer has same profit

作者: emmasy 时间: 2012-6-6 22:02
1.
conclusion:T breed and live in distince groups. some in P, some in A.
premise:little T which feed near B hatch in J. 95% DNA taken from BT
match those taken from T at the J nesting sites.
a.irrevelant
b.irrevelant
c.irrevelant
d.irrevelant
e.weaken
这题条件和结论没找对

作者: emmasy 时间: 2012-6-6 22:24
2.
background:both times when currency was weak made D's products a bargain on world markets, and exports went up.
premise: to cause exports rise again
conclusion：should allow the currency to become weak
a.support
b.weaken
c.irrevelant
d.support
e.irrevelant

3.
conclusion: the city's population growth has not significantly accelerated.
premise:in the past, when mortality rates were high because of poor sanitation, the immigration from rural villages fuled the population. Now, the sanitataion has improved, and immigration has increased.
a.irrevelant
b.explain
c.irrevelant
d.irrevelant
e.irrevelant

5.
background:first-time buyers buy models which is cheaper and has a smaller profit margin per computer than those which are buyed by people who are not first-time buyers.
conclusion:profit from computer sales increased.
premise:the number of computers which were sold was the same, and profit margins are the same.
a.与结论相反
b.irrevelant
c.与结论相反
d.explain
e.条件里说利润不变

作者: bet 时间: 2012-6-10 00:26
1 40”
P: Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from turtles at the Japanese nesting sites.
C：juvenile Pacific loggerheads that feed near the Baja Peninsula hatch in Japanese waters
预测：只要DNA不是百分百相似就不能证明是同一种乌龟
(A) Nesting sites of loggerhead turtles have been found the Pacific coast of North America Several thousand kilometers north of the Baja peninsula.——加强
(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers.——无关
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant.——能削弱，但不是很切合结论
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles.——正确
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years.——无关

逻辑链没时间详写了 BBCD

作者: jetyxo 时间: 2012-6-11 21:58
1 background: longgerhead turtles live in in the Pacific Ocean and some are in the Atlantic
premise:95%of the DNA samples taken from the Baja turtles match those taken from turtles at the Japanese nesting sites.
conclusion:juvenile Pacific loggerheads that feed near the Baja Peninsula hatch in Japanese waters 10,000 kilometers away
weaken:almost all longgerhead turtles have 95% DNA sample mathch each other--->D
A B Eirrelevant. C the nesting site(other than the turtls) declined is irrelevant

2 premise: Both times a weak pundra made Darfir's manufactured products a bargain on world markets, and Darfir's exports were up substantially
conclusion:in order to increase exports, the government should allow pundra weak
weaken: B

3\ background: population grown at a steady rate; bad sanitation--->high mortality + immigration--->increase in population
sanitation become good, no big increase in population
reason: immigration decrease or low both rate--->B

4 C
5 premise: PXC modles profits from first time buyers < profits from non-firsetime buyers
same number sells, same price for the products--->profits increase
reason: more products were sell to non-firsttime buyers--->D

作者: LuckyYolandaLi 时间: 2012-6-21 20:57
1
1）计时：43s
2）逻辑链：
Background information: Loggerhead turtles live and breed in distinct groups, of which some are in the Pacific Ocean and some are in the Atlantic.
Premise: Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from turtles at the Japanese nesting sites.
Conclusion: Juvenile Pacific loggerheads that feed near the Baja Peninsula
hatch in Japanese waters 10,000 kilometers away.3）推测：Lots of the Pacific loggerheads that feed near the Baja Peninsula move to Japanese nesting sites.
4）选项分析：选C（正确答案D）
A: Irrelevant.

2
1）计时：95s
2）逻辑链：
Background information: The Darfir Republic’s currency, the pundra was weak both twelve years ago and five years ago.
Premise: Both times a weak pundra made Darfir's manufactured products a bargain on world markets, and Darfir's exports were up substantially.
Conclusion: The government should allow the pundra to become weak again in order to cause another similarly sized increase in exports.
3）推测：A weak pundra will cause some disadvantages. For example, the export revenue may decrease because the pundra’s value is low relative to the world’s most stable currencies.
4）选项分析：选E（正确答案B）
C: 刚开始选了这个，后来想了想，改了。。。
(额，我居然选了两个错误答案。。。)

3
1）计时：64s
2）逻辑链：
Background information: The population of Megacity, a sprawling metropolis in Remsland, has grown at a fairly steady rate for over a century.
Premise: A hundred years ago, poor sanitation in the city caused high mortality rates among the city's inhabitants, and what fueled the population increase was immigration from rural villages. This immigration has continued and even increased. Moreover, in recent decades, city sanitation has improved enormously.
Conclusion: The city’s population growth has not significantly accelerated.
3）推测：。。。
4）选项分析：选B

4
1）计时：62s
2）逻辑链：
Background information: Plant scientists have used genetic engineering on seeds to produce crop plants that are highly resistant to insect damage.
Premise: the seeds themselves are quite expensive, and the plants require more fertilizer and water to grow well than normal ones. Thus, for most farmers the savings on pesticides would not compensate for the higher seed costs and the cost of additional fertilizer. However, consumer demand for grains, fruits, and vegetables grown without the use of pesticides continues to rise.
Conclusion: The use of genetically engineered seeds of this kind is likely to become widespread.
3）推测：concession premise
4）选项分析：选C

5
1）计时：57s
2）逻辑链：
3）推测：Last year PXC computers bought by people replacing their computers with more powerful models have been sold more than the previous year.
4）选项分析：选D
A: According to the argument, the price for each computer model remained unchanged
B: Irrelevant. Printers have not been referred to in the passage.
C: Irrelevant.
D: Correct.
E: According to the argument, the profit margins for each computer model remained unchanged. If so, the production costs don’t need to be considered.

作者: angelafeng 时间: 2012-6-24 15:25

【1-7】

1.34s

Background information：Loggerhead turtles live and breed in distinct groups, of which some are in the Pacific Ocean and some are in the Atlantic.

Premise：Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from turtles at the Japanese nesting sites.

Conclusion：New evidence suggests that juvenile Pacific loggerheads that feed near the Baja Peninsula hatch in Japanese waters 10,000 kilometers away.

Prephrase：（weaken）

Answer：D

(A) Nesting sites of loggerhead turtles have been found the Pacific coast of North America Several thousand kilometers north of the Baja peninsula.-----------IRRELAVENT
(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers.------------ the above argument does not mention Atlantic loggerhead turtles.
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant.------------the number decline or remain constant cannot weaken the argument.
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles.--------------correct---------------the Baja turtles did not have to take the 10000 kilometer trip.
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years. -------------The argument do not mention any information about Commercial aquariums

25. (30261-!-item-!-188;#058&004144)

39s

Background information: Twelve years ago and again five years ago, there were extended periods when the Darfir Republic's currency, the pundra, was weak: its value was unusually low relative to the world's most stable currencies. Both times a weak pundra made Darfir's manufactured products a bargain on world markets, and Darfir's exports were up substantially.

Premise: the government should allow the pundra to become weak again.

Conclusion: another similarly sized increase in exports
prephrase : (weaken)现在和过去不可比

Answer：B

26. (31045-!-item-!-188;#058&004365)
42S

Background information：The population of Megacity, a sprawling metropolis in Remsland, has grown at a fairly steady rate for over a century. A hundred years ago, poor sanitation in the city caused high mortality rates among the city's inhabitants, and what fueled the population increase was immigration from rural villages.

Premise：This immigration has continued and even increased. Moreover, in recent decades, city sanitation has improved enormously.

Conclusion：Yet the city's population growth has not significantly accelerated.
Prephrase：（explain）人们生孩子少了

Answer：B

27. (31231-!-item-!-188;#058&004411)
35S

Background information：Plant scientists have used genetic engineering on seeds to produce crop plants that are highly resistant to insect damage. Unfortunately, the seeds themselves are quite expensive, and the plants require more fertilizer and water to grow well than normal ones. Thus, for most farmers the savings on pesticides would not compensate for the higher seed costs and the cost of additional fertilizer.

Premise：However, since consumer demand for grains, fruits, and vegetables grown without the use of pesticides continues to rise

Conclusion：the use of genetically engineered seeds of this kind is likely to become widespread.
ANSWER:C

28. (31510-!-item-!-188;#058&004526)
28s

Background information：First-time computer buyers buying PXC home computers typically buy models that cost much less and have a smaller profit margin per computer than do PXC computers bought by people replacing their computers with more powerful models.

Premise：although about the same number of PXC computers were sold and the prices and profit margins for each computer model that PXC sells remained unchanged.
conclusion：Last year PXC's profits from computer sales were substantially higher than the previous year

Prephrase：（support）虽然数量没变，但百分比变了
answer：D

作者: jiajiajudy 时间: 2012-6-25 02:59
1.
BG: LG live & breed in distinct groups (pacific, atlantic)
Premise: LT feed near Baja, hatch in Japanese
Premise: 95% DNA samples match those at Japanese
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles.

2.
BG: pundra was weak, value was low relative to the world’s most stable currencies
Premise: products a bargain on the world markets, exports up
Conclusion: pundra become weak? another similarly sized increase
(D) Those countries whose manufactured products compete with Darfir's on the world market all currently have stable currencies.

3.
most helps to explain why the city's population growth rate has not changed?
BG: population of M grown over a century
Premise: 很久以前 poor sanitation?high mortality rates
Premise: immigration from rural villages?population increase
This immigration continued & increased
Added premise: city sanitation improved
Yet, city’s population growth has not accelerated

(B) For several decades, Megacity, as distinct from the countryside, has had a steadily declining birth rate.
4.
BG: PS genetic seeds highly resistant to insect damage
Counter Premise: expensive, more fertilizer and water than nomal ones? F savings on pesticides 不会花这钱
Counter premise: demand increase? seems genetic seed become widespread
(C) The first presents a development that the argument predicts will have a certain outcome; the second acknowledges a consideration that weighs against that prediction.
5.
BG: FT buy model cost much less, smaller profit margin per PC than replacing more powerful models
Premise: last year profits higher than previous year, number, price, profit margins of each PC Model unchanged

(B) The number of people buying PXC computers who also bought PXC computer-related products, such as printers, was larger last year than the previous year.

作者: 呵呵牙 时间: 2012-6-27 12:24
补作业~~~最近没有做题感觉，总是会判断错误……而且这几天事情好多，考试临近好担心……

1. 32s
Background Information: L turtles live and breed in distinct groups, of which some are in the Pacific Ocean and some are in the Atlantic.
Premise: Pacific L that feed near the BP hatch in Japanese waters 10,000km away.
Conclusion: 95% of the DNA samples taken from B turtles match those taken from turtles at Japanese nesting sites.
Prephrase: Turtles move from other places to BJ hatch
选D
A (north America)——support
B (Atlantic) ——irrelevant
C (number) ——irrelevant
E (commercial aquariums)——irrelevant

2. 33s
Background Information: 12 and 5 years ago, there were extended periods when the Darfir Republic’s currency was week.
Premise: The weak made Darfir’s manufactured products a bargain and exports were up substantially.
Conclusion: Politicians say that the government should allow the currency to weak again to cause exports increasing.
Prephrase: the currency is weak that will lead to other problems which are bigger than export increasing.
选B

3. 35s
Background Information: The population of Megacity has grown at a fairly steady rate.
Premise: 100 years ago, poor sanitation caused high mortality rates and immigration increasing. This immigration has continued and even increased. And city sanitation has improved enormously.
Conclusion: The city’s population growth has not significantly accelerated.
Prephrase: Because the high mortality rates is higher than immigration.
选B

4. 29s
Unfortunately是后面句子的原因. Thus引导结果. However转折,是实际作者要表达的,和thus引导的句子相反意.
选C

5. 36s
Background Information: First-time computer buyers buying PXC home computers buy models that cost much less and have a smaller profit margin per computer than do PXC computers by people replacing their computers with more powerful models.
Premise: Last year PXC's profits from computer sales were substantially higher than the previous year. The same number of PXC computers were sold.
Conclusion: The prices and profit margins for each computer model that PXC sells remained unchanged.
Prephrase: more and more people replacing their computer instead of buying it.
选D

作者: cleotina 时间: 2012-6-30 21:29
6-30

50
weaken
B:a turtles, some of them are in the PO, others are in the Atlantic.
P: since the DNA of the T in BJ penicular is 95% similer to the Jepanese T
C: the T feed in BJ are hatch in Japan
Guess:
1 the situation is on the contrary
2 95% can not prove the deduction
3 the two place are too far to immigrate for T, or other obstacles

OA : D

others I

46
weaken
B: twice in the past decates, the currency is weaken conparing with the

stable currency. a increase in the export emerged after one week of the

event
C: in order to cause another increase in export, the goverment should make

the demostic money weak
Guess: 1 the government can not contrl whether or not to weake the currency
2 as the chande of the worldwild economy, the same situation may not happen
3 other objective factors hinder the seccuss

OA:B
A : strong
others: I

38' (错了，没有看清题目)
explain the abnormal
B:the population of a city maintain a stable increase in the past country.

however a hunder years ago, a high levle of mortality since the sanitation

problems. after that immigrantion keeping settling
P: now , the sanitation is well, however the population has not increase in

the recent decades.
Guess: 1, the conception has changed
2, the new emmigrants do not have the custom to have a baby
3, sinatation is not a certain prerequisite to have more children
OA : A
others: I

55'
boldface
the frame of the article
1: a new one
2: the drawbacks of the new one
3: since the special need, it will spread
OA: A

1'40 (回神+不专注)
support
general conclusion: people will pay more for the second computure than the

first one
Phenominon: last year, the number of the computures are the same, however,

the per margin is lower than last year.
Guess： large percent of the consumers brough thier first computers

OA: D

作者: Donts 时间: 2012-7-15 11:09
1.计时35''background: turtles in different groups

acific Ocean and Atlantic
premise:95% of DNA samples selected from B match that in Japanese nesting sites.
conclusion:young turtle feed near B hatch in Japanese water.
推测：95%DNA符合并不能说明它的幼仔就是在日本附近的水里孵化。
(A) Nesting sites of loggerhead turtles have been found the Pacific coast of North America Several thousand kilometers north of the Baja peninsula.和DNA没什么关系的样子
(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers.错误同A
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant.无关
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles.正确。看到就感觉应该选这个。
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years. 无关

作者: showysimple 时间: 2012-7-27 04:56
[Premise]       - L turtles live and breed in distinct groups in PacificOcean (P) & ATL.
   - 95% of the DNA samples match (between samples taken from BajaPenisula (BP) turtle and those taken from Japan.
[Conclusion]   - BP turtles = turtles hatch in Japan

这题题目较难读懂，1) 一开始找不到conclusion，因为没有明显的过渡词作以提示：“new evidence suggest that…”后没有用“coz”连接下一句。Learning1－题干中若出现“New evidence suggests that…”，注意了，这是conclusion。 2) 出现多个不同的地名，一下子就被搞得没有方向。Learning2－为便于读题，当题干中出现各种不同名词时注意找最关键／最原本的那个，因为其它都是那个关键词的变型／举例。本题中最原本的词是“Pacific Ocean”and“Atlantic”。“Baja Peninsula”, “Japanese waters/Japanese nesting site”是对于“Pacific Ocean”的例举。

[Prephrase]   - DNA相同只能代表两个是“同种”，不能代表两个是“同一个”

A - irrelevant
B - ‘ATL turtle’ is irrelevant,题干中讨论的是B turtle
C - B turtle 和turtles hatch in Japan 数量的变化irrelevant
D – right answer
E - irrelevant

作者: TICKCOCK 时间: 2012-8-6 22:00
8月6日【1-7】
1. Although L turtles live and breed in distinct groups, new evidence suggests that juvenile Pacific L that feed near the Baja Peninsula hatch in Japanese water.
Reason: 95% of the DNA taken from the Baja turtles match those taken from turtles at the Japanese nestling sites.
Answer: B (D)

2. Twelve years ago and 5 years ago, the times when the pundra was weak. Both times a weak pundra made D’s manufactured production up.
Politicians recommends that in order to cause another similarly sized increase, D should make Pundra weak again.
Answer: E(B)

3.Background: the main component of population in the M is immigrate people.
Premise: the sanitation which caused many people dead 100 years ago has been increased, and immigration continues.
Paradox: city’s population growth has not significantly accelerated.
Answer: B

4. BF题
Answer: D (C)

5. Premise: First time computer buyers buying PXC home computers typically buy models that has lower profit than people who buy PXC for replacement.
Result: Last year, PXC’s profit from computer sales were substantially higher.
Answer: D
今天真是错的一塌糊涂啊！！！！

作者: wanggang0411 时间: 2012-8-14 15:45
1 time: 50
Premise 1: Turtles live and breed in distinct group.
Conclusion: Turtles feed near Barjar and hatch 10000 kilometers away.
Premise 2: 95 percent of the DNA taken from Barjar turtles match those taken from turtles 10000 kilometers away.
Weaken conclusion: Any options weakening the Conclusion or Premise 2 would be correct answer.
  -1 All turtles have 95 percent of DNA matching. (Weaken the premise 2)
  -2 Turtles hatch 10000 kilometers away are quite different with the turtles feed near Barjar in terms of shape, weight and appearance. (Weaken the conclusion)

2 time: 46
Premise: two times currency devaluation caused exports increased significantly.
Conclusion: Another time of currency devaluation will increase exports again.
Inference: Any options indicating that another time of devaluation will have negative impact on the manufacture will be the correct answer.
  -1 The cost of import for some materials which is necessary for the export product will increase along with the currency devaluation.
  -2 the currency devaluation will increase the cost of people life which will increase the labor cost subsequently.
E: an alternative cause has same effect.
3 time: 45
Premise: low level sanitation causes the high level mortality rate.
Premise: immigration causes the population increase.
Premise: the improving of sanitation doesn’t cause the increasing of population.
Resolve paradox: Any option explaining the paradox on both sides would be a correct answer.
  -1: There is no immigration any more.
  -2: the birth rate in this city is still lower than mortality rate by any reason.
B: The decline of people in immigration source caused the effect subsequently.

4 time: 49
Premise: Background.
Premise: disadvantage.
Sub conclusion: useless.
Premise: reason.
Conclusion: useful.
Inference: The sentence is a premise to support the sub conclusion.
  The second sentence provide the another reason to refute the sub conclusion, and set forth its conclusion.
C: The first presents a development that argument predicts will have a certain outcome, the second acknowledge a consideration that weighs against the prediction.

5 more than 4:00
Premise: the model bought by First-time buyer cost less and have lower margin than do the powerful model bought by buyer with computer replacement requirement.
Conclusion: the number of sales didn’t change, and the margin per computer didn’t change, but profit increase, why?
Inference: more powerful model had been sold.
D: the proportion of first-time buyer was smaller than last year.

作者: wanggang0411 时间: 2012-8-14 15:59
25. (30261-!-item-!-188;#058&004144)
Twelve years ago and again five years ago, there were extended periods when the Darfir Republic's currency, the pundra, was weak: its value was unusually low relative to the world's most stable currencies. Both times a weak pundra made Darfir's manufactured products a bargain on world markets, and Darfir's exports were up substantially. Now some politicians are saying that, in order to cause another similarly sized increase in exports, the government should allow the pundra to become weak again.
Which of the following, if true, provides the government with the strongest grounds to doubt that the politicians' recommendation, if followed, will achieve its aim?

(B) After several decades of operating well below peak capacity, Darfir's manufacturing sector is now operating at near-peak levels.

For answer B: If the manufacturing is already operating at peak level, with meaning that the requirement of the quantitative of exports product is equal or higher than the supplement ability of the manufacture, so the currency devaluation will not increase the exports.

(E) A sharp improvement in the efficiency of Darfir's manufacturing plants would make Darfir's products a bargain on world markets even without any weakening of the pundra relative to other currencies.

For answer E: yes, although this is another cause for same effect, but it doesn't mention what gonna happen by currency devaluation, so this option is irrelevant.

作者: chengzaaaa 时间: 2012-8-24 21:45
824[1-7]
精炼
1)27”weaken
2)BI: live breed different groups. Some Pacific, some Atlantic
P: 95% DNA samples match, V turtles, J nesting sites
C: P turtles, feed near BP, hatch in Japanese waters.
3)hatch elsewhere and move to the current nesting sites.
4)C D
5)A. Range. Talking about Japan, not North America.
B. irrelevant.
C. Correct. The matching is weakened.
D. wrong matching.
E. irrelevant.

25.
1)27”weaken
2)BI: P was weak twice in the past.
P: when P is weak, exports were up greatly.
C: want to increase exports, should make P weak again.
3)need new things, manufacture can’t keep up, nothing to export
D B

26.
1)26”explain
2)BI: M, not clean, dead people, people moving from rural area, more people. Moving continued, much cleaner.
P:
C: population growth not accelerated.
3)birth rate is low, people moving out the city
B

27.
1)31”BF
2)BI: new seed, no need pesticide, but more fert and water, more expensive
P: demand of no pesticide vege and fruits goes up
C: use of this new thing, rise
3)1: object to main conclusion 2: main conclusion
A? C

28.
1)35”?
2)BI: first-timer buy cheap ones, replacer buy pricy ones
P: profits much more, number sold and profit margin not changed
C:
3)more replacer and less first-timer, proportion is changed
D

谢谢lz！！！

作者: 我心匪席 时间: 2012-8-31 20:42
Time: 32’
Background Information: LT live in PO and A
Premises: 90% DNA of BT match T at Japanese.
Conclusion: JPT near BP hatch in Japanese.
Prephrase: DNA is same in T
A-----irrelevant
B-----irrelevant
C-----irrelevant
D-----right
E-----irrelevant
============================================
Time: 41’
Background Information: 12 years ago , pundra is low relative to world’s most stable currencies. Export increases.
Premises: Increase export.
Conclusion: Decrease pundra
Prephrase: Pundra is too weak to decrease
A-----irrelevant
B-----right
C-----irrelevant
D-----irrelevant
E-----irrelevant
=============================================
Time: 42’
Background Information: Over a century, p has grown at steady rate. 100 years ago, mortality rates were high. Immigration fueled the p.
Premises: Sanitation improved a lot.
Conclusion: P has not significantly accelerated.
Prephrase: Birthrate decreases
A-----irrelevant
B-----right
C-----irrelevant
D-----irrelevant
E-----irrelevant
==============================================
Time: 40’
A C
第二句不仅仅是结论，还有论证在里面。。。。
==============================================
Time: 38’
Background Information: Buyers buy PXC, which is lower cost and smaller margin than powerful models.
Premises: Sale number and profit margin are unchanged.
Conclusion: Profits were higher than the previous year.
Prephrase: Selling more powerful models.
A-----irrelevant
B-----irrelevant
C-----irrelevant
D-----right
E-----irrelevant

作者: ElenW 时间: 2012-10-6 09:59
精练(31'5)
没有看懂题再看一次
Bg

oggerhead turtles live and breed in distinct groups.someare in the Pac.and some are in the Atl.
pre: juvenile Pacific loggerheads that feed near the Baja Peninsula hatch in Japanese waters 10,000 kilometers away.(喂养在一边孵化在一边还是年幼的怎么可能游这么远.....)
argument:95%DNA taken from the Baja turtles match those taken from turtles at the Japanese nesting sites.
(weaken)
I need to weaken the reasoning.That is ,the reasoning is not necessary.不知道改怎么说...
Ans:E--not an issue in the stimulus (我怎么选到E上去的)
A.B.(无用)
C(没有打击这个argument)
D(重述结论)----correct
第一题感觉不好.....带猜的......再研究研究.自己的一点小想法:我发现答案中的subject是要和argument中的核心词相配.
逻辑链
25(49'5)
Bg:Twelve years ago and again five years ago,the pundra, was weak: its value was unusually low relative to the world's most stable currencies.
pre:Both times a weak pundra made Darfir's manufactured products a bargain on world markets, and Darfir's exports were up substantially.
con:in order to cause another similarly sized increase in exports, the government should allow the pundra to become weak again.
(weaken)
Pre:If weak the currency again,the economy will be suffered.In addition to ,although the export size has increased, the capability of consuming has been in respond to decrease.(思路有点没有抖清楚)
Ans:B
A-irrelevant
C-It is not necessary
D-suppot
E-not correct
26(31's)
Bg:The population of Megacity has grown at a fairly steady rate for over a century.
Pre: immigration has continued and even increased ; city sanitation has improved enormously.
con:Yet the city's population growth has not significantly accelerated.
(help-assmption)
Pre:immigration->increased;city sanitation improve->health and live well
emigration increase>immigration. poor sanitation in the city caused high mortality rates among the city's inhabitants has not recovered.
Ans:B
A-itself is contradict
C-irrelevant
D-contradict
E-irrelevant

作者: srafcatt 时间: 2012-10-6 20:14
精炼 29s weaken

BG

turtles live and breed in distinct groups

premise:95% genes are similar

conclusion:they are the same.

only 95% similar genes cannot decide that those turtles are the same.

choice

A irrelevant

B it has nothing to do with the distance

C loggerhead can have many hatchling sites to let the number in Baja peninsula remain constant.

D correct,this information indicates that Baja turtles hatch in Atlantic and may not be the same species as the ones in Japanese waters.

E strenghten

逻辑链

1.45s weaken

12年以前和5年前，都有个被延伸扩大的时期，那时darfir共和国的货币--pandra十分疲软：它的价值与世界货币的关联异乎寻常的低。这两个时段疲软的pundra使得darfir制造的产品在世界市场上十分便宜，并且darfir的出口量十分显著。现在一些政治家说，为了引起另一个在出口上的同样规模的增长，政府应允许pundra再一次疲软。

premise

arfir had succeed in gaining money from exports when its currency is weak.

conclusion:if Darfir want to have the same size of increase again,pundra must be weak again

if pundra remains weak，then it is not safe as to a poor country in the world.

choice:E

A strenghten

B strenghten

C the former part is correct,the latter is incorrect

D irrelevant

E correct

2.45s paradox

megacity是一个在remsland不规则延伸的大城市，它的人口，已经在一个多世纪以相对稳定的速度成长。100年以前，在城市里的贫乏的卫生设备导致了高的城市居民死亡率，并且使人口增长的原因是地方乡村的移民。这个移民在持续，甚至是增长。更有甚者，在最近几十年，城市卫生设备已经大大地改善。然而城市人口增长已经没有显著的增长。

BG：poor sanitation lead to high mortality rate of citizens and the population increase by immigration

premise:the trend of immigration is extending and sanitation has improved

conclusion:citizen number has not improved.

citizen is migrating,too.out of this city

choice:B

A not only not explain the situation,in fact,it strenghten that the phenomenon's existence is reasonable

B correct

C irrelevant

D irrelevant

E irrelevant

3.37s boldface

BF1:seeds expensive and more ferterlizer and water needed--->not saving money

BF2:customers prefer food without pesticides--->special seeds tend to be wide spread

choice:C

4.35s support

BG

XC first time computer buyers tend to buy smaller profit margin ones but the second or more times buyer will not.

premise:the number and the price and the profit margins of PXC computers are all not changed.

conclusion:last year PXC computer profits were higher

the proportion of those non first time buyers is larger.

choice

A incorrect,the number has not changed

B irrelevant,the question is talking about computer profit

C irrelevant

D correct
E irrelevant，that's not a right way to strenghten the logic listed in question stem

作者: srafcatt 时间: 2012-10-6 20:32
纠错：逻辑链第一题：
关于那个darfir国政治家想再次让本国货币疲软来赚外汇的题应该选B ，因为既然到达顶峰就没有多少上升空间了。
我做题总爱瞎想，比如没准没空间只是表面现象呀。。。。
另外E 选项是由于没有直接谈论要削弱的逻辑，只是说成本的下降会代替去让本国货币疲软，可是可以代替不意味着被代替的方案不好，因此是没有削弱的。

作者: Cassiezhao 时间: 2012-10-8 09:09
能把每个题的答案都在最后贴出来吗？

作者: ariel0923 时间: 2012-10-17 18:43
结论：juvenile Pacific loggerheads that feed near the Baja Peninsula hatch in Japanese waters 10,000 kilometers away.
根据：Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from turtles at the Japanese nesting sites.
(A) Nesting sites of loggerhead turtles have been found the Pacific coast of North America Several thousand kilometers north of the Baja peninsula.无关没有提到DNA
(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers.无关文中提到的是Pacific loggerheads
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant.无关
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles.
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years. 无关

作者: hanhan1991 时间: 2012-11-20 13:18
1.weaken
1)time:42s/1''26'
2)logical lines:
Premise: 95% of the DNA taken from Baja turltles match those taken from turtle at the Japanese nesting site.
Conclusion:Turtles live and breed in distinctive group.
3)Prediction:
If 95% of the DNA of all turtles matches, the number can not prove the turtles in Baja are the same ones in Japanese water.
4)Answer

A.~~this strengthen the argument.~~
***it does not affact the argument.
B.5000km is still a long distance so this answer can not weaken the argument.
***we only focus on Baja turtles.
C.the number seems irrelevant. the declining number of turtles in Japanese water can be explained by the change of nesting site of the turtles.
***the unchanged number of sites does not prove the remian number of turtles.
D.this is the same as the prediction.
E.the successful breeding is irrelevant.

2.weaken.
1)time:51s/1''49'
2)logical lines:
Premise:When the D's currency was comparatively low in the previous years, the country's exports were up substantiatlly.
Objective:Increase the country's export market today.
Plan

ecrease its currency again.
3)Predication:
If the country already operates at its full productivity, even if it decrease its currency, it can not produce more goods for export.
4)Answer:B
A.this strengthen the argument.
B.the same as prediction, but open to discussion.
C.irrelevant, since we do not care about the health of the export.
D.this may strengthen the argument, since the low currency would attract more buyers.
E.irrelevant,since we only care about how the lowering currency will affact the exports.

3.explain
1)time:50s/1''27'
2)logical lines:
Background: The city's population groew at a steady rate 100 ago because of the high mortality rate due to poor sanitation and of increasing immigration from rural areas.
Situation: Now the sanitation is much better and the immigration has continued and even increase.
Paradox:The population of the city has not increased.
3)Prediction:
There must be some factors that caused the loss of the population of the city, for instance the high working pressure cause people leave the city.
4)Answer:B
A.irrelevant,since it does not clarify the increasing mortality rate of vehicular traffic in the recent years.
B.the declining birth rate accounts for the deline in the city's population.
C.other city is irrelevant.
D.this may aggravate the paradox.
E.irrelevant, since it only accout for the increasing immigration.

4.boldface
1)time:39s/1''49'
2)logical lines:
a innovation->its bad effects->conclusion1
its goodeffects->conclusion2
3)Prediction:
The first sentence is bad effect of the innovation which will result in conclusion1; the second state the premise and the conclusion2 which denis the conlusion1.
4)Answer:B
B.The first introduces a development that the argument predicts will have a certain outcome; the second is a state of affairs ~~that the argument denies will be part of that outcome~~.
C.The first presents a development that the argument predicts will have a certain outcome; the second acknowledges a consideration that weighs against(influence)that prediction.----correct

5.must be true
1)time:44s/1''40'
2)logical lines
PXC for first-time buyer costs less and has lower profit level than PXC for old users. The profits of PXC were higher in last year than in previous year. The same number of PXC was sold and the price is unchanged.
3)Prediction:
Because PXC for old user has a higher profit level, last year the computer sold for these people must constitute for a higer percentage than in the previous years.
4）Answer

A.this is opposite to the argument.
B.the related computer products are not motioned in the argument.
C.the brand of the used computer is irrelevant.
D.the same as the prediction
E.this opposite to the argument since the profits margin is unchanged.

作者: CD用户825193 时间: 2012-12-18 09:31
标题: Daily CR-7_2012-12-18
1. 32+28+31" (Weak)
P: Loggerhead turtles live in specific ~~area~~ groups: Pacific and Atlantic.
P: 95% of DNA in Baja loggerheads matches the DNA of Japanese ones.
C: Loggerheads in Baja hatch in Japan ocean water (10,000 kilo meters away)
Pre: Compared samples were not big enough. All loggerheads have 95% DNA the same. (Guessed right, but didn't choose the right answer.)
Answers:
(A) Nesting site only, doesn't weaken
(B) ~~CORRECT~~ 5,000 KM was about the Atlantic turtles, not the Baja ones, irrelevant(C) Irrelevant: while hatchlings decline, the nest sites could keep constant with each site having less turtles.
(D) ~~Support~~ CORRECT: 95% DNA of Baja turtles also the same with Atlantic ones', so 95% DNA share can't be the reason to conclude hatching in Japan ocean
(E) Irrelevant: Commercial aquarium breeding has nothing to do with the topic.

Vocabulary: hatch; hatchling

2. 54" (Weak)
P: D's currency has been weak twice, and the weak currency made D's manufactured goods a bargin in the world market.
P: Export sizes increased.
C: Government shall allow the currency to be weak -> bring similar sized export goods
Pre: Now D's manufactured goods are not welcome as years ago. There's another country whoes currency is weak now, and similar goods popular in the international market.
Answers:
(A) Irrelevant
(B) CORRECT ~~Only mentioned the manufacture level.~~ 【Near peak production level -> can't produce much more -> nothing can increase export level including weaken currency】
(C) Healthier economy is irrelevant
(D) Support
(E) CORRECT 选的时候就觉得有点牵强。。。还是不能留半点怀疑啊~

3. 50" (Missing Reasoning)
P: Poor sanitation caused the M city high mortality, but now the sanitation's been improved.
P: People from rural areas keep moving to M, and the number is increasing.Missing Reasoning Pre:
1. Some epidemic / famine / other causes increased mortality in M.
2. Birth rate in M decreased
C: The population in M still hasn't signaficantly accelarated.
Answers:
(A) Eliminated other morden causes -> Opposite conclusion
(B) Declining birth rate -> CORRECT
(C) Other cities are irrelevant
(D) Opposite conclusion
(E) Opposite conclusion

4. 40" (Boldface Role)
P: Scientists made seeds highly resistant to insect damage. Boldface-1: P: But the seeds are expensive, and need more water and fertilizer. (against the final conclusion)
P: Farmers don't wanna buy the seeds.
Boldface-2: P: Consumers' needs of grains, fruits and veg are increasing, Final conclusion: so the seeds will finally be widespread.
Answers:
(A)
~~(B) CORRECT.~~ B-2: "a state of affairs" -> WRONG
(C) CORRECT. B-2: "a consideration"
(D)
(E)

5. 40+38" (Missing Info)
P: Profits from first pc buyers < Profits from people buying better pc to replace the old onesMissing Info Pre: Less first buyers, more replacing buyers
P: Same numbers of pc sold and same profit of each pc.
C: Much higher profit.
Answers:
(A) Same number of pc sold -> Not more attractive
(B) Profits of other products: irrelevant
(C) Proportion of replacing buyers who replaced the PXC pc is irrelevant
(D) CORRECT: First buyer is smaller -> replacing buyer is bigger -> more profit
(E) Price and profit of each pc keeps the same -> Cost can't be lower

作者: zxppx 时间: 2013-1-11 11:54
1.

Loggerhead turtles live and breed in distinct groups, of which some are in the Pacific Ocean and some are in the Atlantic. New evidence suggests that juvenile Pacific loggerheads that feed near the Baja Peninsula hatch in Japanese waters 10,000 kilometers away. Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from turtles at the Japanese nesting sites.

The argument seems to demonstrate that since the DNA samples match highly between the Baja turtles and the Japanese turtles, the turtles that come from the Japanese nesting sites are those turtles that feed near the Baja Peninsula.
Which one of the following, if true, most seriously weakens the reasoning above?

(A) Nesting sites of loggerhead turtles have been found the Pacific coast of North America Several thousand kilometers north of the Baja peninsula.

Even though nesting sites have been found the Pacific coast, we cannot prove that the relationship between the Baja turtles and the turtles from the Pacific coast nesting sites.
(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers.

The choice is only referred to Atlantic turtles, rather than Baja turtles or turtles from Japanese nesting sites.
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant.

Although we can see the differences, there is no evidence supported to weaken the argument.

Even though the number of hatchlings is declined, the number of nesting sites would remain constant, albeit with fewer turtles at each. Because of this possibility, the answer does not undermine the argument.
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles.

Since the similarity situation happens between Baja turtles and Atlantic turtles, the choice can weaken the argument. We should know that Japan is in the Pacific Ocean. BA
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years.

From this choice, we know nothing about the Baja turtles.

25. (30261-!-item-!-188;#058&004144)
Twelve years ago and again five years ago, there were extended periods when the Darfir Republic's currency, the pundra, was weak: its value was unusually low relative to the world's most stable currencies. Both times a weak pundra made Darfir's manufactured products a bargain on world markets, and Darfir's exports were up substantially. Now some politicians are saying that, in order to cause another similarly sized increase in exports, the government should allow the pundra to become weak again.

The argument seems to involve in the line of reasoning that in the future, the situation will remain unchanged just as it did in the history. However, it is very possible that the trend will change or even reverse, severely weakening the argument. Admittedly, the argument would be even weaker each day as time goes by.
Which of the following, if true, provides the government with the strongest grounds to doubt that the politicians' recommendation, if followed, will achieve its aim?

(A) Several of the politicians now recommending that the pundra be allowed to become weak made that same recommendation before each of the last two periods of currency weakness.

What these politicians recommended before has nothing to do with the current situation.
(B) After several decades of operating well below peak capacity, Darfir's manufacturing sector is now operating at near-peak levels.

Since the current condition of Darfir’s manufacturing sector is changed, the fact severely weakens the argument. BA
(C) The economy of a country experiencing a rise in exports will become healthier only if the country's currency is strong or the rise in exports is significant.

Shell Game: the argument talks about the rise in exports, rather than the health of the economy of a country.
(D) Those countries whose manufactured products compete with Darfir's on the world market all currently have stable currencies.

Even though it reveals that other countries’ situation, we do not know what will happen to Darfir.
(E) A sharp improvement in the efficiency of Darfir's manufacturing plants would make Darfir's products a bargain on world markets even without any weakening of the pundra relative to other currencies.

The choice seems very attractive at first glance, but the argument talks about these politicians’ recommendation that the country makes the pundra weak again, rather than without any weakening of the pundra relative to other currencies.

26. (31045-!-item-!-188;#058&004365)
The population of Megacity, a sprawling metropolis in Remsland, has grown at a fairly steady rate for over a century. A hundred years ago, poor sanitation in the city caused high mortality rates among the city's inhabitants, and what fueled the population increase was immigration from rural villages. This immigration has continued and even increased. Moreover, in recent decades, city sanitation has improved enormously. Yet the city's population growth has not significantly accelerated.
Which of the following, if true, most helps to explain why the city's population growth rate has not changed?

(A) Mortality rates that were associated with poor sanitation in Megacity a hundred years ago were orders of magnitude higher than are mortality rates associated with vehicular traffic, which is currently a major cause of death in the city.

The choice seems valid at first glance, but a more thorough analysis reveals that it is highly questionable. Because mortality rates caused by poor sanitation are higher than mortality rates caused by vehicular traffic, we should think about the now condition of population of Megacity would significantly accelerate.
(B) For several decades, Megacity, as distinct from the countryside, has had a steadily declining birth rate.

By introducing the decline in the birth rate, the choice successfully reconciles the contradiction. BA
(C) Cities smaller than Megacity have also experienced sustained population growth.

There is no relationship with the cities smaller than Megacity.
(D) The great majority of immigrants to Remsland settle in Megacity, at least initially.

Actually, the choice stimulates the contradiction.
(E) Megacity has long offered better employment prospects than most rural areas.

The same to D.

27. (31231-!-item-!-188;#058&004411)
Plant scientists have used genetic engineering on seeds to produce crop plants that are highly resistant to insect damage. Unfortunately, the seeds themselves are quite expensive, and the plants require more fertilizer and water to grow well than normal ones. Thus, for most farmers the savings on pesticides would not compensate for the higher seed costs and the cost of additional fertilizer. However, since consumer demand for grains, fruits, and vegetables grown without the use of pesticides continues to rise, the use of genetically engineered seeds of this kind is likely to become widespread.
In the argument given, the two portions in boldface play which of the following roles?

(A) The first supplies a context for the argument; the second is the argument's main conclusion.

The second is the main conclusion. Actually, the first is contradictory to the second.
(B) The first introduces a development that the argument predicts will have a certain outcome; the second is a state of affairs that the argument denies will be part of that outcome.
(C) The first presents a development that the argument predicts will have a certain outcome; the second acknowledges a consideration that weighs against that prediction.

The second is a prediction that weighs against the prediction drawn from the first. BA
(D) The first provides evidence to support a prediction that the argument seeks to defend; the second is that prediction.
(E) The first and the second each provide evidence to support the argument's main conclusion.

28. (31510-!-item-!-188;#058&004526)
First-time computer buyers buying PXC home computers typically buy models that cost much less and have a smaller profit margin per computer than do PXC computers bought by people replacing their computers with more powerful models. Last year PXC's profits from computer sales were substantially higher than the previous year, although about the same number of PXC computers were sold and the prices and profit margins for each computer model that PXC sells remained unchanged.
If the statements above are true, which of the following is most strongly supported by them?

(A) PXC's competitors raised the prices on their computers last year, making PXC computers more attractive to first-time computer buyers.

The argument has showed that the same number of PXC computers was sold and the prices and profit margins for each computer model remained unchanged.
(B) The number of people buying PXC computers who also bought PXC computer-related products, such as printers, was larger last year than the previous year.

Although the choice seems valid at first glance, the argument talks nothing about PXC computer-related products, such as printers.
(C) Among computer buyers who bought a PXC computer to replace their existing computer, the proportion of buyers who were replacing a computer made by a competitor of PXC was greater last year than the previous year.

Actually, the choice weakens the argument. If PXC computer buyers replaced computers made by a competitor of PXC, the profit of PXC would decrease.
(D) The proportion of PXC computers bought by first-time computer buyers was smaller last year than the previous year.

Since the proportion of PXC computers bought by first-time computer buyers was smaller, the proportion of PXC computers bought by people replacing their computers with more powerful models was greater last year than the previous year. Please notice that the argument only talks about two kinds of buyers of PXC computers.BA
(E) PXC's production costs for its computers were lower last year than they had been the previous year.

The same to A.

作者: pennyz 时间: 2013-2-9 23:38
今天没法做了，先占楼。明天一定补上45s
background:tuiler hatch and feed in p and a
premise:95% of gene similar between b and j
conclusion:feed in b and hatch in j
rephrase:they are similar but not neccessary the same
(A) Nesting sites of loggerhead turtles have been found the Pacific coast of North America
Several thousand kilometers north of the Baja peninsula.-------north a turtles is irrelevant to the b and j
(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers.-----not applied to the b and j turtle
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant.----weaken
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles.------a t is not relevant
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years. ---irrelevant

作者: pennyz 时间: 2013-2-10 23:35
2:21
E
background:the p is weak, cause export of manufacture properse
premise:to properse the export
conclusion: make p weak
(A) Several of the politicians now recommending that the pundra be allowed to become weak made that same recommendation before each of the last two periods of currency weakness.-------irrelevant,the history is not logical to make today's decision
(B) After several decades of operating well below peak capacity, Darfir's manufacturing sector is now operating at near-peak levels.------manufacture's peak is not related directly to the export
(C) The economy of a country experiencing a rise in exports will become healthier only if the country's currency is strong or the rise in exports is significant.------------irrelevant to the ecomony's health,the aim is export size
(D) Those countries whose manufactured products compete with Darfir's on the world market all currently have stable currencies.-------not about the competitors'currency
(E) A sharp improvement in the efficiency of Darfir's manufacturing plants would make Darfir's products a bargain on world markets even without any weakening of the pundra relative to other currencies.-------correct?
2:07
B
Premise:still lots of migration
conclusion:the population increase at steady rate
(A) Mortality rates that were associated with poor sanitation in Megacity a hundred years ago were orders of magnitude higher than are mortality rates associated with vehicular traffic, which is currently a major cause of death in the city.-----we don't talk about the cause of death
(B) For several decades, Megacity, as distinct from the countryside, has had a steadily declining birth rate.------correct
(C) Cities smaller than Megacity have also experienced sustained population growth.----other city,irrelevant
(D) The great majority of immigrants to Remsland settle in Megacity, at least initially.-------more migration ,more population
(E) Megacity has long offered better employment prospects than most rural areas.-----irrelevant
1;12
D
1:51
C
Background:first buyer buy less pxc
while most people buy pxc by replacing
phenomenon:the profit rise
margin profit and number stay
A) PXC's competitors raised the prices on their computers last year, making PXC computers more attractive to first-time computer buyers.
(B) The number of people buying PXC computers who also bought PXC computer-related products, such as printers, was larger last year than the previous year.
(C) Among computer buyers who bought a PXC computer to replace their existing computer, the proportion who were replacing a computer made by a competitor of PXC was greater last year than the previous year.
(D) The proportion of PXC computers bought by first-time computer buyers was smaller last year than the previous year.------not know
(E) PXC's production costs for its computers were lower last year than they had been the previous year.-----contradict to the phenomenon

作者: 一粒黄豆。 时间: 2013-3-11 19:14
3/11 【1-7】
45'
gackground:lt live and breed in PO, AT
premise:95% DNA taken from B match those taken from J
conclusion:lt in P that feed near B hatch in J
premise:some group of lt feed and hatch in J
A irrelevant
B correct
C irrelevant
D irrelevant
E irrelevant
精炼感觉要求很多背景知识啊，比如10000对小乌龟来说是很长的距离，比如DNA相似问题。。。。
错选B：自己添加了assumption，两个地方的乌龟有共性
正确选项D：看了解释还是觉得这个题出的不好，为什么在A找到了95%相似DNA就能weaken另外一个95%的相似呢？解答说不用爬那么远。。。那至少前提要告诉我哪个近哪个远啊- - 我地理又没学过

44'
premise:12 , 5 years ago,weak pundra-->increase export
conclusion:to increase export we should weak pundra
prephrase:condition changes, other approaches
错选E
关键在于问题，题干虽然说-为了increase exports--〉should weak pundra，好像是其他途径也行
但是问题说，什么能质疑这个方法达到目标。也就是weak pundra 无法increase export，E没有削弱这一层，无关
正确选项B：说已经在峰值附近了，所以货币贬值也没什么提高，符合题目要求

50'
premise:poor sanitation-->population decrease in city;immigration from rural -->population increase
premise:now good sanitation-->stop decrease popu;immigration continued-->increase popu
question:growth rate has not changed
prephrase:some other factors caused death
错选A：什么是引起死亡的主要因素并不重要。除非选项说，这个因素最近导致了比以前都多得死亡
错了
跟人口增长有关的因素：死亡率，出生率，迁入迁出。死亡率降低，迁入迁出继续增加，总人口增长却不变，说明其他因素off set了
正确答案B

50'
counterpremise:need more on cost of seed+additional fertilizer
counterconclusion:cost of seed+additional fertilizer> savings on pesticides
conclusion:demand rise-->seeds widespread
C
但是bf1并没有推出什么结论，只提供了前提

48’
premise

XC bought first time has smaller margin, PXC for replacing has higher margin, premise:number of PXC sold unchanged,but total profit increase
prephrase: proportion of PXC bought for replacing increase
D

居然错了三道。。。。要崩溃了。。。。最近逻辑跌入低谷，这日子没发过了。。。。

作者: 纽约我爱你 时间: 2013-3-24 17:25
1~31s
Premise: the DNA of the two groups matches well
Conclusion: the b group hatch on j
Weaken: 1.a survey shows that the j hatch on b
2.the DNA of two other species matches well, too. But they are known that they are different
3.animals hatch and feed at other places change their DNA
Answer: D59s

2~48s
Premise: 1. the P has been weak for twice
2. each time it made the D strong
3. the D is weak now（这这这，好像文中根本没有啊，完全是我自己意淫的……而且这个绝对会误导选项）
Conclusion: to make the D strong, the P should be made weak.
Weaken: 1.there is no relationship between the weakness of P and the growth of D
2.the truth is that P became weak because of the growth of D
Answer: A1’18’’ 错了

正解是B。 A要注意人家是加强啊啊啊

3~50s
Premise: 1. the population decreased because of bad sinary but immigration makes it grow
2.the immigration is continuing
3.the sinary is improved
Conclusion: the population doesn’t increase significantly
Explain: the number of move-in doesn’t meet the number of death
Answer: A?2’错了

正解是B。注意看清楚啊， A是从前比现在大……orz

4~33s
Premise: 1.the genetic seeds are expensive
2.the consumers like to buy food without drug
Conclusion: the seeds will be popular
Answer: C56’’

5~45s
Premise: 1.first-buyers would like to buy less profitable computers than replace-buyers
2. the number of computers sold last year was unchanged
3.the profit per computer stays unchanged
4.the total profit increased
Conclusion: the replace-buyers are more in this year
Answer: D 35’’(注意第三个选项，不看清楚好有迷惑性啊……)

今天发现问题一半在看不懂题上，另一半在马虎上。哦，不对，还有就是自己预测的答案总是没有出现……这么说来应该就是思路还是不对吧……怎么才能加强呢……头痛

作者: okplokpl0714 时间: 2013-3-31 21:00
精练：
Lt live and breed in distinct groups

O and A.
95% of DNA samples from BP match Jw-->juvenile P Lts feed BP , hatch in Jw 10000km away.
削弱猜测：Jw本来就有这种乌龟；A的乌龟和Jw有关系
Answer：D

逻辑链：
25.
12 and 5 years ago,DP currency-the pundra-weak:unusually low the stable currencies.
weak pundra---->DP's manufactured products a bargain and DP's exports up
Now politician:should allow pundra weak again to cause another exports up.
削弱猜测：exports up带来的利益没有manufactured products bargain的损失大
Answer：B因为生产力已经达到顶峰了，出口量已经在之前就到顶了，无法再加大出口了。

26.
Population of M grown at steady rate for over a century.
A century ago,poor sanitation-->high mortality rates
increase immigration from rural---->fueled the population(this immigration increase)
More,sanitation has improved enormously-->But population not significantly accelerated.
解释猜测：移民减少了或者其他他因
Answer：B

27.
BF1:evidence against the main conclusion
BF2:main conclusion
Answer:C

28.
modles cost less and smaller profit >powerful models
Last year profit>previous year,although same number sold and price and profit remained unchanged
支持猜测：powerful models卖的比以前好
Answer：B
答案是D。。。first-time computer buyer比原来少了，first-time买家喜欢低端models，要是电脑售出数量不变的话，那就说明买低端models的人少了，那是不是就是我猜测的那样，高端model销售多了？？

作者: Cybill 时间: 2013-4-16 18:40
1. 25‘
BG: some Loggerhead turtles live in Pacific Ocean, some live in Atlantic.
Premise: young Pacific turtles, which live near Baja Peninsula, has the same DNA as Japanese nesting sites.

2. 乱：currency drop----pundra weak-----exports increase

3. 40’
Conclusion: the population of Megacity not increase
Premise: immigration from rural villages. city senitaion improve.
4. 33.7
5. 40'
下班啦，赶不及了！

作者: Mint静默 时间: 2013-8-9 10:50
1) 计时：41s 这一题好多地名0 0
2) 逻辑链
Background Information:
Loggerhead turtles live and breed in distinct groups, of which some are in the Pacific Ocean and some are in the Atlantic.
Premise:
Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from turtles at the Japanese nesting sites.
Conclusion:
juvenile Pacific loggerheads that feed near the Baja Peninsula hatch in Japanese waters 10,000 kilometers away.
3) 推测：
选项要么正对DNA samples进行质疑，要么直接反驳juvenile Pacific loggerheads不可能去那么远的地方hatch
Ps. 特地百度了下Japanese water 在pacific ocean 里，地理盲伤不起
4) 选项分析：
(A) Nesting sites of loggerhead turtles have been found the Pacific coast of North America Several thousand kilometers north of the Baja peninsula. 本文讨论的事Pacific loggerheads turtles, 选项给的样本太宽泛了
(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers. 无关，本文讨论的事Pacific turtles
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant. 无关
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles. Correct
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years. 无关

25.
1) 计时：41S
2) 逻辑链
P：以前，weak D国货币导致D国的 manufactured products a bargain on world markets and exports were up substantially.
C：in order to cause another similarly sized increase in exports, the government should allow the 货币 to become weak again.
3) 猜测
凡事适可而止 or 过去的事情不能预测未来的事情
4) 选项分析
(A) Several of the politicians now recommending that the pundra be allowed to become weak made that same recommendation before each of the last two periods of currency weakness. 支持非 weaken
(B) After several decades of operating well below peak capacity, Darfir's manufacturing sector is now operating at near-peak levels. Correct，说明市场饱和已经不能在increase in exports了
(C) The economy of a country experiencing a rise in exports will become healthier only if the country's currency is strong or the rise in exports is significant. 无关，economy’s health 不在讨论范围内
(D) Those countries whose manufactured products compete with Darfir's on the world market all currently have stable currencies. 无关
(E) A sharp improvement in the efficiency of Darfir's manufacturing plants would make Darfir's products a bargain on world markets even without any weakening of the pundra relative to other currencies. 无关

26.
1) 计时： 44s
2) 逻辑链
P: This immigration has continued and even increased. City sanitation has improved enormously
CX: the city's population growth has not significantly accelerated.
3) 猜测
它因解释CX
4) 选项分析
(A) Mortality rates that were associated with poor sanitation in Megacity a hundred years ago were orders of magnitude higher than are mortality rates associated with vehicular traffic, which is currently a major cause of death in the city. 无关比较
(B) For several decades, Megacity, as distinct from the countryside, has had a steadily declining birth rate. Correct
(C) Cities smaller than Megacity have also experienced sustained population growth. 无关
(D) The great majority of immigrants to Remsland settle in Megacity, at least initially. 反而更不能解释了
(E) Megacity has long offered better employment prospects than most rural areas. 导致migration的一个原因，无关

27.
1) 计时： 41s
2) 逻辑链
B1：用来支持老C的P
B2：新C
3) 选项分析
选C

28.
1) 计时：30S
2) 逻辑链
P1: First-time computer buyers buying PXC home computers typically buy models that cost much less and have a smaller profit margin per computer than do PXC computers bought by people replacing their computers with more powerful models.
P2: About the same number of PXC computers were sold and the prices and profit margins for each computer model that PXC sells remained unchanged.
问C是什么
3) 猜测
people replacing their computers with more powerful models变多了
4) 选项分析
选D

作者: Mint静默 时间: 2013-8-9 10:51
这一次全对~好开心！

作者: Elisha728 时间: 2013-8-28 22:27
10'35
DEBAD

作者: Elisha728 时间: 2013-8-28 22:28
又错了两个！！！！！！！！！

作者: Elisha728 时间: 2013-8-29 06:35
逻辑链第四个为什么不选A？

作者: Elisha728 时间: 2013-9-1 13:52
(30261-!-item-!-188;#058&004144)
Twelve years ago and again five years ago, there were extended periods when the Darfir Republic's currency, the pundra, was weak: its value was unusually low relative to the world's most stable currencies. Both times a weak pundra made Darfir's manufactured products a bargain on world markets, and Darfir's exports were up substantially. Now some politicians are saying that, in order to cause another similarly sized increase in exports, the government should allow the pundra to become weak again.
Which of the following, if true, provides the government with the strongest grounds to doubt that the politicians' recommendation, if followed, will achieve its aim?
(A) Several of the politicians now recommending that the pundra be allowed to become weak made that same recommendation before each of the last two periods of currency weakness. Irrelevant
(B) After several decades of operating well below peak capacity, Darfir's manufacturing sector is now operating at near-peak levels.
(C) The economy of a country experiencing a rise in exports will become healthier only if the country's currency is strong or the rise in exports is significant. Irrelevant
(D) Those countries whose manufactured products compete with Darfir's on the world market all currently have stable currencies. Irrelevant
(E) A sharp improvement in the efficiency of Darfir's manufacturing plants would make Darfir's products a bargain on world markets even without any weakening of the pundra relative to other currencies. irrevelant

Analysis

Why the correct answer is B instead of E

Look carefully at E, the word “would” means hypothesis instead of reality. If a sharp improvement does happen, then Darfir’s products can be a bargain on world markets without any weakening of the pundra relative to other currencies.

so "would" make option D may happen, so D is less effective at weakening the proposal.

作者: lyrsilvia 时间: 2013-9-15 21:28
D BBAD
1. 26’
P: Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from turtles at the Japanese nesting sites.
C: juvenile Pacific loggerheads that feed near the Baja Peninsula hatch in Japanese waters 10,000 kilometers away
Weaken the reasoning: finding≠actual, match≠hatch
答案：D
(A) Nesting sites of loggerhead turtles have been found the Pacific coast of North America Several thousand kilometers north of the Baja peninsula.-------other nesting sides do not affect the Japanese nesting sides, irrelevant
(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers.---------------distance is not relevant
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant.------how the change does not affect the truth
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles.-------------CORRECT. the gene match those Atlantic turtles does not means Baja turtles must lay their eggs in Japan. The match is insufficient to give birth to hatch
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years.------commercial aquariums' success does not mean the natural truth.

2. 32'
P: history data: weak currency--> increase in exports
C: to increase exports, should allow the currency to become weak again.
Doubt the recommendation: weak currency now cannot guarantee export increas
答案：B
(A) Several of the politicians now recommending that the pundra be allowed to become weak made that same recommendation before each of the last two periods of currency weakness.------support the recommendation
(B) After several decades of operating well below peak capacity, Darfir's manufacturing sector is now operating at near-peak levels.-------------CORRECT. means cannot produce any more goods to export. even with lower currency, the export will not increase
(C) The economy of a country experiencing a rise in exports will become healthier only if the country's currency is strong or the rise in exports is significant.---------the country does not care about the economy healthy, just the export increase
(D) Those countries whose manufactured products compete with Darfir's on the world market all currently have stable currencies.---------other countries' stable currency will guarantee the bargain of exports, SUPPORT
(E) A sharp improvement in the efficiency of Darfir's manufacturing plants would make Darfir's products a bargain on world markets even without any weakening of the pundra relative to other currencies.--------the improvement of efficiency is not discussed in the question.

3. 39'
P: poor sanitation-->high mortality, population increase was fueled by immigration
C: high sanitation & immigration continued and increased-->population not significantly accelerated
Explain: there are sb. move out
答案：B
(A) Mortality rates that were associated with poor sanitation in Megacity a hundred years ago were orders of magnitude higher than are mortality rates associated with vehicular traffic, which is currently a major cause of death in the city.-------------what's the mortality associated with is not the case
(B) For several decades, Megacity, as distinct from the countryside, has had a steadily declining birth rate.-------------CORRECT. birth rate↓but death rate↓, means the natural population growth maybe balanced, thus the whole population growth rate may be negative. it is the reason why the whole population not significantly accelerated
(C) Cities smaller than Megacity have also experienced sustained population growth.--------other city's experience is not sufficient to explain the M.
(D) The great majority of immigrants to Remsland settle in Megacity, at least initially.--------settle means more population, but the truth is not more population. thus not explain but exaggerate.
(E) Megacity has long offered better employment prospects than most rural areas.--------better employment should attract more immigrates and population should increase more.

4. 28'
P: the genetic seeds are expensive, but consumers demands are high
C: thus the genetic engineered seeds are likely to become widespread.
BOLDFACE: one disadvantage, one advantage and a conclusion
答案：A
(A) The first supplies a context for the argument; the second is the argument's main conclusion.------CORRECT
(B) The first introduces a development that the argument predicts will have a certain outcome; the second is a state of affairs that the argument denies will be part of that outcome.--------the first is not a development
(C) The first presents a development that the argument predicts will have a certain outcome; the second acknowledges a consideration that weighs against that prediction.-----------the second is not just a consideration; the first is not presenting a development that the argument predict(widespread), but a development that the argument disagree(not compensate) CORRECT
(D) The first provides evidence to support a prediction that the argument seeks to defend; the second is that prediction.------------the first is not to defend, but to oppose
(E) The first and the second each provide evidence to support the argument's main conclusion.-----the second is the conclusion, not just evidence; and the first is not support evidence
==============================================================
又错了黑脸题....这里的predication没有弄懂，混淆了前后的顺序；A中the first is a context也不准确，应该是一个evidence，或者用C中的development才准确。
==============================================================
5. 32'
BG: cost: first-time buyer<replace(second buyer)
profit margin: first buyer< replace
P: last year, same number computer, same price, same profit margin
C: profit higher
Support: second buyer increase in proportion
答案：D
(A) PXC's competitors raised the prices on their computers last year, making PXC computers more attractive to first-time computer buyers.------------because the amount of computers sales is the same, thus more attractive≠more buying, cannot explain the higher profit
(B) The number of people buying PXC computers who also bought PXC computer-related products, such as printers, was larger last year than the previous year.---------------other products' profits do not include in the computer profit, thus irrelevant
(C) Among computer buyers who bought a PXC computer to replace their existing computer, the proportion who were replacing a computer made by a competitor of PXC was greater last year than the previous year.---------------means more customers are attracted, but this does not guarantee higher profit
(D) The proportion of PXC computers bought by first-time computer buyers was smaller last year than the previous year.-------------CORRECT. even the number does not change, the profit margin increase, thus the profit becomes higher
(E) PXC's production costs for its computers were lower last year than they had been the previous year.--------profit margins do not change, thus means costs down, profits down

作者: meckyona 时间: 2013-9-27 22:56
好久没做题！！罪过！
Loggerhead turtles live and breed in distinct groups, of which some are in the Pacific Ocean and some are in the Atlantic. New evidence suggests that juvenile Pacific loggerheads that feed near the Baja Peninsula hatch in Japanese waters 10,000 kilometers away. Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from turtles at the Japanese nesting sites.
Which one of the following, if true, most seriously weakens the reasoning above?
B: L turtles live in PO and A
P: some feed in Japanese waters 10000 kilos away, most of their DNA samples match those taken from turtles at Japanese nesting sites

问削弱
A 没削弱
B irrelevant, 不是atlantic
C irrelevant
D 对，既然也符合AT的基因，那么就不能一次推断是pacific
E irrelevant

Twelve years ago and again five years ago, there were extended periods when the Darfir Republic's currency, the pundra, was weak:  its value was unusually low relative to the world's most stable currencies.  Both times a weak pundra made Darfir's manufactured products a bargain on world markets, and Darfir's exports were up substantially.  Now some politicians are saying that, in order to cause another similarly sized increase in exports, the government should allow the pundra to become weak again.
Which of the following, if true, provides the government with the strongest grounds to doubt that the politicians' recommendation, if followed, will achieve its aim?
B：there were 2 times that when pundra was weak, the exports were up
P: politicians thought that the pundra should be weak again
C so the exports will increase
问削弱，怎样可能是货币贬值但是出口并不会增加
A no
B 没有削弱
C 对
D 加强？
E irrelevant
health 和题目无关，
The population of Megacity, a sprawling metropolis in Remsland, has grown at a fairly steady rate for over a century.  A hundred years ago, poor sanitation in the city caused high mortality rates among the city's inhabitants, and what fueled the population increase was immigration from rural villages.  This immigration has continued and even increased.  Moreover, in recent decades, city sanitation has improved enormously.  Yet the city's population growth has not significantly accelerated.
Which of the following, if true, most helps to explain why the city's population growth rate has not changed?
Sanitation 环境卫生 mortality 死亡率
B：a place’s population has grow steadily, there was immigration and the city sanitation has improved. But the population hasn’t accelerated
求原因

A irrelevant
B make sense 对
C so what …
D 无法解释
E irrelevant!!

Plant scientists have used genetic engineering on seeds to produce crop plants that are highly resistant to insect damage.  Unfortunately, the seeds themselves are quite expensive, and the plants require more fertilizer and water to grow well than normal ones.  Thus, for most farmers the savings on pesticides would not compensate for the higher seed costs and the cost of additional fertilizer.  However, since consumer demand for grains, fruits, and vegetables grown without the use of pesticides continues to rise, the use of genetically engineered seeds of this kind is likely to become widespread.
In the argument given, the two portions in boldface play which of the following roles?
C
First-time computer buyers buying PXC home computers typically buy models that cost much less and have a smaller profit margin per computer than do PXC computers bought by people replacing their computers with more powerful models.  Last year PXC's profits from computer sales were substantially higher than the previous year, although about the same number of PXC computers were sold and the prices and profit margins for each computer model that PXC sells remained unchanged.
If the statements above are true, which of the following is most strongly supported by them?
明显是因为换更好电脑的人多了吧
A利润没变
B 好像也能说明
C 对
D no
E无法解释
这道题不应该错的，其实一开始都想对了，但是还是忽视了总量没变，其中一个有变化代表另一赚的多的量增加。

作者: 览物之情 时间: 2013-10-9 06:31
Background: Loggerhead turtles live and breed in distinct groups, of which some are in the Pacific Ocean and some are in the Atlantic.
Conclusion: New evidence suggests that juvenile Pacific loggerheads that feed near the Baja Peninsula hatch in Japanese waters 10,000 kilometers away.
Because: Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from turtles at the Japanese nesting sites.
Which one of the following, if true, most seriously weakens the reasoning above?
P: 95% of DNA same done not mean it is the same thing.
D
A) Nesting sites of loggerhead turtles have been found the Pacific coast of North America Several thousand kilometers north of the Baja peninsula.
(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers.
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant .
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles.———————— 所以可以是来自Aturtles.
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years. 无关

2 32s
Premise: Both times a weak pundra made Darfir's manufactured products a bargain on world markets, and Darfir's exports were up substantially.
Conclusion:Now some politicians are saying that, in order to cause another similarly sized increase in exports, the government should allow the pundra to become weak again.
Which of the following, if true, provides the government with the strongest grounds to doubt that the politicians' recommendation, if followed, will achieve its aim?
类比推理
P something happen in the past does not mean to be happen in the future because the circumstances are different.
B
(A) Several of the politicians now recommending that the pundra be allowed to become weak made that same recommendation before each of the last two periods of currency weakness.
(B) After several decades of operating well below peak capacity, Darfir's manufacturing sector is now operating at near-peak levels. Correct: things are different now
(C) The economy of a country experiencing a rise in exports will become healthier only if the country's currency is strong or the rise in exports is significant.
(D) Those countries whose manufactured products compete with Darfir's on the world market all currently have stable currencies.
(E) A sharp improvement in the efficiency of Darfir's manufacturing plants would make Darfir's products a bargain on world markets even without any weakening of the pundra relative to other currencies.
3 36s
Premise: This immigration has continued and even increased.  Moreover, in recent decades, city sanitation has improved enormously.  Y
Outcome: et the city's population growth has not significantly accelerated.
Which of the following, if true, most helps to explain why the city's population growth rate has not changed? or other direction
P immigrations increases, what about people move out? B
(A) Mortality rates that were associated with poor sanitation in Megacity a hundred years ago were orders of magnitude higher than are mortality rates associated with vehicular traffic, which is currently a major cause of death in the city.
(B) For several decades, Megacity, as distinct from the countryside, has had a steadily declining birth rate. Correct.
(C) Cities smaller than Megacity have also experienced sustained population growth.
(D) The great majority of immigrants to Remsland settle in Megacity, at least initially.
(E) Megacity has long offered better employment prospects than most rural areas.

4 34s 有点绕
Plant scientists have used genetic engineering on seeds to produce crop plants that are highly resistant to insect damage.  Unfortunately, the seeds themselves are quite expensive, and the plants require more fertilizer and water to grow well than normal ones.  Thus, for most farmers the savings on pesticides would not compensate for the higher seed costs and the cost of additional fertilizer.  However, since consumer demand for grains, fruits, and vegetables grown without the use of pesticides continues to rise, the use of genetically engineered seeds of this kind is likely to become widespread.
In the argument given, the two portions in boldface play which of the following roles?
P first part is evidence support thus….the second is a conclusion.
C
A) The first supplies a context for the argument; the second is the argument's main conclusion. First does not sound like a context for the argument.
(B) The first introduces a development that the argument predicts will have a certain outcome; the second is a state of affairs that the argument denies will be part of that outcome. --------Second is not what denies
(C) The first presents a development that the argument predicts will have a certain outcome; the second acknowledges a consideration that weighs against that prediction.--correct
(D) The first provides evidence to support a prediction that the argument seeks to defend; the second is that prediction.——---incorrect

(E) The first and the second each provide evidence to support the argument's main conclusion.-----------first does not seems to provide support

5 32s
Premise: First-time computer buyers buying PXC home computers typically buy models that cost much less and have a smaller profit margin per computer than do PXC computers bought by people replacing their computers with more powerful models.

Conclusion: Last year PXC's profits from computer sales were substantially higher than the previous year

If the statements above are true, which of the following is most strongly supported by them?
P most of the customers are second-time buyers.
D
A) PXC's competitors raised the prices on their computers last year, making PXC computers more attractive to first-time computer buyers.
(B) The number of people buying PXC computers who also bought PXC computer-related products, such as printers, was larger last year than the previous year.
(C) Among computer buyers who bought a PXC computer to replace their existing computer, the proportion who were replacing a computer made by a competitor of PXC was greater last year than the previous year.
(D) The proportion of PXC computers bought by first-time computer buyers was smaller last year than the previous year.------ Correct
(E) PXC's production costs for its computers were lower last year than they had been the previous year.

作者: w.melhere 时间: 2013-10-20 12:54
1. 30’ 不确定的做对了，看了解释很明白了呢
3.42‘ 又没有注意题里的 This immigration has continued and even increased. 错了。

作者: cecidefok 时间: 2013-10-29 16:27
精练题
问削弱
选D

25.
P:过去两次pundra weak的时候,dafir的出口业都好转
C:要再一次有similar sized的出口好转,就要使pundra变weak
问削弱
B.现在已经接近peak了,再weak,也打不到similar size的进步选B

26.
P:以前M城卫生条件不好,导致死亡率高,只能靠移民来增加人口
移民延续,而且卫生条件好转,但人口依然没有大幅增加
问原因
选B,出生率变少

27.
选C

28.
P

XC的利润大增,卖出数量,价格不变
问原因
选D

作者: yuehuasunday 时间: 2013-11-7 14:10
1.

Background: Loggerhead turtles live and breed in distinct groups, of which some are in the Pacific Ocean and some are in the Atlantic.

Premise: New evidence suggests that juvenile Pacific loggerheads that feed near the Baja Peninsula hatch in Japanese waters 10,000 kilometers away.

Conclusion: Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from turtles at the Japanese nesting sites.

(D) Correct

2.

Background: Twelve years ago and again five years ago, there were extended periods when the Darfir Republic's currency, the pundra, was weak:

Premise: Both times a weak pundra made Darfir's manufactured products a bargain on world markets, and Darfir's exports were up substantially.

Conclusion: in order to cause another similarly sized increase in exports, the government should allow the pundra to become weak again.

(B) Correct

3.

Background: The population of Megacity, a sprawling metropolis in Remsland, has grown at a fairly steady rate for over a century. A hundred years ago, poor sanitation in the city caused high mortality rates among the city's inhabitants, and what fueled the population increase was immigration from rural villages.

Premise: This immigration has continued and even increased. Moreover, in recent decades, city sanitation has improved enormously.

Conclusion: Yet the city's population growth has not significantly accelerated.

(B) Correct

4.

Background: Plant scientists have used genetic engineering on seeds to produce crop plants that are highly resistant to insect damage.

Premise: Unfortunately, the seeds themselves are quite expensive, and the plants require more fertilizer and water to grow well than normal ones.

Conclusion: However, since consumer demand for grains, fruits, and vegetables grown without the use of pesticides continues to rise, the use of genetically engineered seeds of this kind is likely to become widespread.

© Correct

5.

Background: First-time buyers buy cheap

Premise: second time buyers buy more expensive products

Conclusion: this year's profit is greater than last year's

(D) Correct
© unclear who made the first computer

作者: irenetopia 时间: 2013-11-20 15:17
Loggerhead turtles live and breed in distinct groups, of which some are in the Pacific Ocean and some are in the Atlantic. New evidence suggests that juvenile Pacific loggerheads that feed near the Baja Peninsula hatch in Japanese waters 10,000 kilometers away. Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from turtles at the Japanese nesting sites.
Which one of the following, if true, most seriously weakens the reasoning above?
逻辑链：LT生活和繁殖在不同的地方，一个在在太平洋，一个在大西洋
少年LT是在离日本附近的一个叫B的地方繁殖
因为95%的B的LT的DNA样本和在日本栖息的T是匹配的
问削弱：找样本不具有代表性或样本不充分

(A) Nesting sites of loggerhead turtles have been found the Pacific coast of North America Several thousand kilometers north of the Baja peninsula.
(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers.
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant.
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles.——bingo！和大西洋的也匹配就不能说明sample具有代表性了
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years.

【逻辑链】
25. 2:14
Twelve years ago and again five years ago, there were extended periods when the Darfir Republic's currency, the pundra, was weak:  its value was unusually low relative to the world's most stable currencies.  Both times a weak pundra made Darfir's manufactured products a bargain on world markets, and Darfir's exports were up substantially.  Now some politicians are saying that, in order to cause another similarly sized increase in exports, the government should allow the pundra to become weak again.
逻辑链：在12年轻和5年前，D国的货币P低于世界水平——D在国际市场可以讨价还价——这时D国的的EXPORT上升了
现在政治家们为了export有同样大小的上升，想要允许P再降。

问削弱：思路——削弱的话，就等于是假设P降低的时候，D的export不能再上升，直接影响export的是bargain，所以说要找一个选项表示P降低的时候，bargain已经不能和以前那样了。

Which of the following, if true, provides the government with the strongest grounds to doubt that the politicians' recommendation, if followed, will achieve its aim?
(A) Several of the politicians now recommending that the pundra be allowed to become weak made that same recommendation before each of the last two periods of currency weakness.——跟以前提过的没有联系
(B) After several decades of operating well below peak capacity, Darfir's manufacturing sector is now operating at near-peak levels.——bingo！已经对bargain没有什么影响了，所以E不能再上升了
(C) The economy of a country experiencing a rise in exports will become healthier only if the country's currency is strong or the rise in exports is significant.——说到了经济发展，无关
(D) Those countries whose manufactured products compete with Darfir's on the world market all currently have stable currencies.——和其他国家的比较，无关
(E) A sharp improvement in the efficiency of Darfir's manufacturing plants would make Darfir's products a bargain on world markets even without any weakening of the pundra relative to other currencies.——和减弱没有关系，问题削弱的是降低也打不成目标

(31045-!-item-!-188;#058&004365)
The population of Megacity, a sprawling metropolis in Remsland, has grown at a fairly steady rate for over a century.  A hundred years ago, poor sanitation in the city caused high mortality rates among the city's inhabitants, and what fueled the population increase was immigration from rural villages.  This immigration has continued and even increased.  Moreover, in recent decades, city sanitation has improved enormously.  Yet the city's population growth has not significantly accelerated.
逻辑链：100年轻，poor sanitation带来了搞mortality，不过大量的农村来的immigration加速了GR。
现在immigration还是增加，但是sanitation好了。但是人口增长率还是没有增长

问原因：思路：以前影响growth rate的是S负相关，I正相关
现在S变好了，I和原来一样在增长，GR应该也增加，但是GR没有明显增加。
S变少了，死亡率就低了，I增多了。那么应该是还有一个变化的改变了GR。跟S和I都不相关

Which of the following, if true, most helps to explain why the city's population growth rate has not changed?

(A) Mortality rates that were associated with poor sanitation in Megacity a hundred years ago were orders of magnitude higher than are mortality rates associated with vehicular traffic, which is currently a major cause of death in the city.——加强了既然S对GR的影响比T对GR的影响大，那么现在人口应该上升才是
(B) For several decades, Megacity, as distinct from the countryside, has had a steadily declining birth rate.——bingo！提到了十年，还有M面临的减少的下降率
(C) Cities smaller than Megacity have also experienced sustained population growth.——没有这个比较
(D) The great majority of immigrants to Remsland settle in Megacity, at least initially.——定居了人应该更多了
(E) Megacity has long offered better employment prospects than most rural areas——无关

50S
Plant scientists have used genetic engineering on seeds to produce crop plants that are highly resistant to insect damage.  Unfortunately, the seeds themselves are quite expensive, and the plants require more fertilizer and water to grow well than normal ones.  Thus, for most farmers the savings on pesticides would not compensate for the higher seed costs and the cost of additional fertilizer.  However, since consumer demand for grains, fruits, and vegetables grown without the use of pesticides continues to rise, the use of genetically engineered seeds of this kind is likely to become widespread.

In the argument given, the two portions in boldface play which of the following roles?
这题我错了！！！！！！为什么第二句话不是结论！！！！！！！为什么是C！！！！！
(A) The first supplies a context for the argument; the second is the argument's main conclusion.
(B) The first introduces a development that the argument predicts will have a certain outcome; the second is a state of affairs that the argument denies will be part of that outcome.
(C) The first presents a development that the argument predicts will have a certain outcome; the second acknowledges a consideration that weighs against that prediction.
(D) The first provides evidence to support a prediction that the argument seeks to defend; the second is that prediction.
(E) The first and the second each provide evidence to support the argument's main conclusion.

(31510-!-item-!-188;#058&004526)
First-time computer buyers buying PXC home computers typically buy models that cost much less and have a smaller profit margin per computer than do PXC computers bought by people replacing their computers with more powerful models.  Last year PXC's profits from computer sales were substantially higher than the previous year, although about the same number of PXC computers were sold and the prices and profit margins for each computer model that PXC sells remained unchanged.
If the statements above are true, which of the following is most strongly supported by them?

逻辑链：第一次买电脑的人对PXC来说利润小于和给电脑换more powerful models。今年它的销量和利润都增长了，但是电脑总数不变和价格都不变
思路：电脑总数=第一次+换的。利润=第一次+换的
利润和销量上升，销售总数不变，价格不变，只能是内部比例变化

(A) PXC's competitors raised the prices on their computers last year, making PXC computers more attractive to first-time computer buyers.
(B) The number of people buying PXC computers who also bought PXC computer-related products, such as printers, was larger last year than the previous year.
(C) Among computer buyers who bought a PXC computer to replace their existing computer, the proportion who were replacing a computer made by a competitor of PXC was greater last year than the previous year.
(D) The proportion of PXC computers bought by first-time computer buyers was smaller last year than the previous year.——bingo！第一次电脑少，换models的就多了！
(E) PXC's production costs for its computers were lower last year than they had been the previous year.

作者: goodluck22 时间: 2014-3-2 12:12
Background: live and breed in distinct group
Premise: feed  Baja and hatch in Japaness water
Conclusion: 90 dna Baja match dna in japan
Prephrase: there are loggerhead turtles in Japan
A. Irrelevant nesting site
B. Another background
C. Irrelevant
D. Correct prove that they all share high percent of dna
E. Commercial is Irrelevant

Background: DR currency was weak 20 and 5 years ago
Premise: Weak currency made D export increase
Conclusion: to weak again -> increase export
Prephrase: weak again will not increase export
A. background of the politicians
B. Correct . weak again will not increase the export
C. Do not discuss healthier
D. Support
E. Efficiency is not discuss here.

Background: Megacity population has grown at a fairy steady rate
Premise: 100 years ago, poor sanitation cause high mortality rate
Population was increase by immigration from rural.  And the immigration continued to increase
Conclusion: population growth has not accelerated Birth do not increase.
Prephrase:  factor cause lots of people die
A. Didn’t explain
B. Correct
C. Do not explain
D. Still did not explain why not accelerated
E. Only explain why people will go to megacity

Premise:  Unfortunately, the seeds themselves are quite expensive, and the plants require more fertilizer and water to grow well than normal ones.
However, since consumer demand for grains, fruits, and vegetables grown without the use of pesticides continues to rise, the use of genetically engineered seeds of this kind is likely to become widespread.
ANSWER: c

Premise: profit margin: Replace people > first .  same number and each model profit remain
Conclusion : last year profit was higher
Prephrase: replace > first
A. weaken
B. out of scope it is talk about computer sales
C. Irrelevant
D. Correct
E. Profit same

作者: cyndichiang 时间: 2014-4-6 14:13
精练题：1'35''看不懂

逻辑链是猜的：premise:95%of the DNA of Baja turtles match those J turtles
Conclusion:juvenile Pacific loggerheads that feed near the Baja Peninsula hatch in Japanese waters 10,000 kilometers away.
感觉suggests后面紧跟的应该是结论，而且应该是基因控制生物吧，基因在前。。= =真心没看懂
Preprase: 感觉应该跟95%DNA有关

(A) Nesting sites of loggerhead turtles have been found the Pacific coast of North America Several thousand kilometers north of the Baja peninsula.-----irrelevant,没说到DNA，感觉只是在强调结论，没有解释前提和结论关系
(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers.-----irrelevant,感觉只是在反驳结论是错的，没有说明前提和结论之间的关系
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant.----removing from the number of hatching from the number of sit?解释没看明白
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles.---correct,所有的乌龟DNA匹配都为95%，由因导致与结论相悖的结果，不需要hatch in J
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years. -----irrelevant,水族馆是否能成功养育A L与文章推理过程无关

逻辑链：
2.34‘’
premise: weak currency →bargain in world market→export↑
conclusion:in order to cause another similarly sized increase in exports,government plan to make currency weak again.
prephrase: 实地全等（把作文的搬上来了）：过去有效不代表现在有效
            它因：不是因为低汇率导致的出口增加，是一个必要条件，但反过来说不一定，出口增加不一定要降低汇率
            方案副作用：降低汇率导致其他问题是方案不可行

3.39‘’
BG:poor sanitation in the city caused high mortality rates among the city's inhabitants, and what fueled the population increase was immigration from rural villages
Premise: the immigration has continued and city sanitation has improved enormously.
Conclusion:Yet the city's population growth has not significantly accelerated.
Q:explain:
prephrase: 解释要涉及两方面：说出两这共性并解释discrepancy,移民和好的卫生应该会使人口增加，但是某一部分population既不是移民也不受卫生条件的影响。。（我在说什么。。- -混乱了。。）

4.37''
作者against的一条逻辑链：
BG:  Plant scientists have used genetic engineering on seeds to produce crop plants that are highly resistant to insect damage.
premise:cost of these special seeds is much more than normal ones
Conclusion: the savings on pesticides would not compensate for the higher seed costs and the cost of additional fertilizer---means it is not necessary for farmers to plant genetic seeds
削弱结论的它因的逻辑链：
premise: consumers require plants without the use of pesticides continues to rise
Conclusion: the genetic engineering seeds are necessary.

5.38''
BG: Contrast:cost and profit margin:First-time computer buyers buying PXC home < PXC computers bought by people replacing their computers with more powerful models.
premise:the same number of PXC computers were sold and the prices and profit margins for each computer model that PXC sells remained unchanged last year
conclusion: Last year PXC's profits from computer sales were substantially higher than the previous year
Q:support
prephrase: 这题看懂了还蛮简单的：应该是那么背景中说到的，替代旧的PXC买家比一手买家多了嘛。。

作者: simonleo 时间: 2014-4-30 14:27
DEBCD
1.
Time:38s
P:95% of the DNA samples taken from the Baja turtles match those taken from turtles at the Japanese nesting sites.
C:juvenile pacific loggerheads that feed nearthe Baja Peninsula hatch in Japanese waters 10000 kilimeters away.
Pre:削弱。物种的基因本来就都基本上相同。

(A) Nesting sites of loggerhead turtles have been found the Pacific coast of North America Several thousand kilometers north of the Baja peninsula. 近一些，但是原文是说基因相近的原因导致的结论。所以无法削弱。
(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers. 无关考虑的不是距离
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant. 无关
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles. 正解，说明了DNA不能作为判断依据。
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years. 无关

2
Time:1:17 像currency这种词总是不能很敏感很确定的反映出它的意思，想去联系实际去理解这种现象耗时就长需要加快。
P:Both times a weak currency made Darfir's manufactured products a bargain on world markets and exports were up substantially.
C:in order to cause another similarly sized increase in exports, the govern should allow the pundra to become weak again.
Pre:C-->E:pundra weak-->exports increase.
(A) Several of the politicians now recommending that the pundra be allowed to become weak made that same recommendation before each of the last two periods of currency weakness. 不能削弱前两次的export确实增加了
(B) After several decades of operating well below peak capacity, Darfir's manufacturing sector is now operating at near-peak levels.无关前两次也不知道manufactur的情况
(C) The economy of a country experiencing a rise in exports will become healthier only if the country's currency is strong or the rise in exports is significant. shell game 没有要考虑economy的情况你说它的一个坏处，但是我要考虑的只是能不能增加exports
(D) Those countries whose manufactured products compete with Darfir's on the world market all currently have stable currencies. 从一定程度上看来增强了原建议。
(E) A sharp improvement in the efficiency of Darfir's manufacturing plants would make Darfir's products a bargain on world markets even without any weakening of the pundra relative to other currencies. 正解，给出他因削弱，还有其他情况可以导致export增加啊，不一定要靠pundra weak嘛
题目问话形式是 doubt that the politicians' recommendation will achieve its aim. 即要说明它不能achieve its aim。这么看来E也不好，因为似乎不能说明另外那种方法不能achieve。所以不确定选什么。

if the situation were to trigger much larger demand for the products, then the companies would also have to be able to make more of the products in order to satisfy that increased demand.

B means that they’re already making almost as much as they can today. In addition, they were not making anywhere near as much as they could 12 years ago and 5 years ago. That’s a change from the last two times when exports went up a lot. Does that change actually matter? If they can only make a little more product, will they be able to fill the demand if it goes up a lot? This one’s looking like it could weaken the situation.
理解方向出错了，题目中说 manufactured products 可以bargain 所以出口增多。该题目中B选项，说以前生产的产品都是低于饱和值的，即可以生产更多，那么当currency low的时候，就可以出口；现在能生产的products已经达到一个饱和值，low的时候，你能生产的都已经出口了，不能生产更多则不能增加出口。
原文argument针对的是politation说的货币贬值，增加出口。问削弱这个方案的。
B中强调生产在peak level即即便贬值，产能也不能达到更多出口。
出口要考虑两个因素，1.有没有市场。2.产能跟不跟的上。

3.
Time：34s
P:several years ago, the sanitation is bad which cause high mortality rates among city's inhabitants.
immigration from rural villages fueled the population increase.
C-P:immigration has continued and even increased and city sanitation has improved enormously, yet population growth has not significatly accelerated.
Pre:solve the paradox.也许有人从城市迁出到rural地区。
(A) Mortality rates that were associated with poor sanitation in Megacity a hundred years ago were orders of magnitude higher than are mortality rates associated with vehicular traffic, which is currently a major cause of death in the city. 无法解释， magnitute higher 说明了虽然现在车祸会导致人死亡但是死亡数量比起以前卫生导致的要少得多则应该增加很多才对
(B) For several decades, Megacity, as distinct from the countryside, has had a steadily declining birth rate. 正解，死亡率下降可以说明人口减少变慢但是不能保证人口就会迅速增加，如果只有immigration一个增长因素，死亡率变不变化没有影响则当然人口不会明显增加
(C) Cities smaller than Megacity have also experienced sustained population growth.无关
(D) The great majority of immigrants to Remsland settle in Megacity, at least initially.不能解释
(E) Megacity has long offered better employment prospects than most rural areas.不能解释

4.
Time:38s
p1:Unfortunately, the seeds themselves are quite expensive, and the plants require more fertilizer and water to grow well than normal ones.
c1:for most farmers the savings on pesticides would not compensate for the higher seed costs and the cost of additional fertilizer.
c-p:since consumer demand for grains, fruits, and vegetables grown without the use of pesticides continues to rise
c-c:the use of genetically engineered seeds of this kind is likely to become widespread.
pre:第一句是一个原因，可能会反驳arg的结论；第二句是一个可以支持结论的前提和arg的结论。
(A) The first supplies a context for the argument; the second is the argument's main conclusion.第一句不算是提供背景
(B) The first introduces a development that the argument predicts will have a certain outcome; the second is a state of affairs that the argument denies will be part of that outcome.错这个affairs不是他和argument denies的
(C) The first presents a development that the argument predicts will have a certain outcome; the second acknowledges a consideration that weighs against that prediction. 正解
(D) The first provides evidence to support a prediction that the argument seeks to defend; the second is that prediction.第一个不是要defend的
(E) The first and the second each provide evidence to support the argument's main conclusion. 错

5.
Time：47s
P:1.first-time computer buyers buy models which are cheaper and have a smaller profit margin per computer than buyers who replave their computers with more powerful models.
2.last year profit from computer sales were higher than the previous year, same number of computers were sold and the price and profit margins for each model remained unchanged.
Pre: must be true，销售数量相等，各种机型价格、利润都没变化，但总收入增加。可以推出老顾客买的数量比以往多。
(A) PXC's competitors raised the prices on their computers last year, making PXC computers more attractive to first-time computer buyers. 无关信息
(B) The number of people buying PXC computers who also bought PXC computer-related products, such as printers, was larger last year than the previous year.得不出
(C) Among computer buyers who bought a PXC computer to replace their existing computer, the proportion who were replacing a computer made by a competitor of PXC was greater last year than the previous year. competitor 是新信息
(D) The proportion of PXC computers bought by first-time computer buyers was smaller last year than the previous year.正解新顾客少则第二次购买顾客多，则总收入增加
(E) PXC's production costs for its computers were lower last year than they had been the previous year.错价格和利润都没变则进价也没变。

作者: 采药去 时间: 2014-10-23 15:04
C--->选D premise and conclusion 都搞反了
C
B
C
D

实习上班理由今天就暂时不写了

作者: spencerchan 时间: 2015-8-12 15:20
50’’ 第一遍没看懂，又看了一遍，哎。。
P: 95% DNA samples taken from the Baja turtles match those taken from turtles at the Japanese nesting sites
C: Juvenile Pacific loggerheads that feed near the Baja Peninsula hatch in Japanese waters
Prep: The same sample =/ hatch in the same place
D: CORRECT
A: WEAKEN??, I am not sure
B: Strengthen
C: Irrelevant
E: Irrelevant

45’’
P: In order to increase export size
C: The government should make currency go weak
Prep: Making currency go weak would lead serious issues
C: CORRECT
A: Irrelevant
B: Irrelevant
D: Irrelevant
E: This option provides other way, but it does not weaken the politician’s recommendation

1’09’’
P: Sanitation improved and the immigration has continued
C: The city’s population growth has not significant accelerated
Prep: Old people died?
B: CORRECT
A: Weaken? Frankly, I cannot understand the meaning…
C: Irrelevant
D: Immigration has continued increase, so people immigrate to other cities includes in the amount
E: Irrelevant

47”
B: Scientists plan to produce a high resistant crop plants
P: The cost to grow the new crop is higher than pesticide cost
P: BUT, customer prefer the new crop
C: The new crop would be wide used
C: CORRECT

44’’
B: The first buying customers prefer lower profit margin computer than the customers replace their computer
P: This year’s profit is higher than last year
P: same number of computer was sold and the profit margin and the price of each computer did not change
Prep: More people buy computers for replacing
D: CORRECT
A: Weaken
B: Irrelevant
C: Irrelevant
E: Profit margin does not change

不能第一遍读懂题干很致命，或者就是选项理解错误，继续加油～

作者: MIA926 时间: 2015-8-31 16:41
CR小分队20150831-7
Loggerhead turtles live and breed in distinct groups, of which some are in the Pacific Ocean and some are in the Atlantic. New evidence suggests that juvenile Pacific loggerheads that feed near the Baja Peninsula hatch in Japanese waters 10,000 kilometers away. Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from turtles at the Japanese nesting sites.
Which one of the following, if true, most seriously weakens the reasoning above?
计时：26.34s
逻辑链：90% of the DNA samples of B turtles match those of the Japanese ones——》 B turtle hatch in Japanese water.
(A) Nesting sites of loggerhead turtles have been found the Pacific coast of North America Several thousand kilometers north of the Baja peninsula. 无关
(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers. 无关
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant. 无关
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles. 正确
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years. 无关

【逻辑链】
25. (30261-!-item-!-188;#058&004144)
Twelve years ago and again five years ago, there were extended periods when the Darfir Republic's currency, the pundra, was weak:  its value was unusually low relative to the world's most stable currencies.  Both times a weak pundra made Darfir's manufactured products a bargain on world markets, and Darfir's exports were up substantially.  Now some politicians are saying that, in order to cause another similarly sized increase in exports, the government should allow the pundra to become weak again.
逻辑链：以前weak currency increase sales of product——》to increase exports should let the currency become weak again.
方案：政策实施会有其他不良的后果；类比推理结果不对，以前和现在情况有所不同；
Which of the following, if true, provides the government with the strongest grounds to doubt that the politicians' recommendation, if followed, will achieve its aim?
(A) Several of the politicians now recommending that the pundra be allowed to become weak made that same recommendation before each of the last two periods of currency weakness. 加强
(B) After several decades of operating well below peak capacity, Darfir's manufacturing sector is now operating at near-peak levels. 正确
(C) The economy of a country experiencing a rise in exports will become healthier only if the country's currency is strong or the rise in exports is significant. 无关economy
(D) Those countries whose manufactured products compete with Darfir's on the world market all currently have stable currencies. 无关
(E) A sharp improvement in the efficiency of Darfir's manufacturing plants would make Darfir's products a bargain on world markets even without any weakening of the pundra relative to other currencies. 无关提到了其他方法但没有讲到这个政策为什么不好

26. (31045-!-item-!-188;#058&004365)
The population of Megacity, a sprawling metropolis in Remsland, has grown at a fairly steady rate for over a century.  A hundred years ago, poor sanitation in the city caused high mortality rates among the city's inhabitants, and what fueled the population increase was immigration from rural villages.  This immigration has continued and even increased.  Moreover, in recent decades, city sanitation has improved enormously.  Yet the city's population growth has not significantly accelerated.
逻辑链：以前poor sanitation caused high mortality rates, immigration fueled the population increase——》now more immigration and better sanitation but population growth has not accelerated
Which of the following, if true, most helps to explain why the city's population growth rate has not changed?
(A) Mortality rates that were associated with poor sanitation in Megacity a hundred years ago were orders of magnitude higher than are mortality rates associated with vehicular traffic, which is currently a major cause of death in the city. 算是增强吧…
(B) For several decades, Megacity, as distinct from the countryside, has had a steadily declining birth rate. 正确生的少了虽然死的也少了移民的也增加了但是略抵消了所以不加速
(C) Cities smaller than Megacity have also experienced sustained population growth. 无关
(D) The great majority of immigrants to Remsland settle in Megacity, at least initially. 无关
(E) Megacity has long offered better employment prospects than most rural areas. 无关

27. (31231-!-item-!-188;#058&004411)
Plant scientists have used genetic engineering on seeds to produce crop plants that are highly resistant to insect damage.  Unfortunately, the seeds themselves are quite expensive, and the plants require more fertilizer and water to grow well than normal ones.  Thus, for most farmers the savings on pesticides would not compensate for the higher seed costs and the cost of additional fertilizer.  However, since consumer demand for grains, fruits, and vegetables grown without the use of pesticides continues to rise, the use of genetically engineered seeds of this kind is likely to become widespread.
In the argument given, the two portions in boldface play which of the following roles?
(A) The first supplies a context for the argument; the second is the argument's main conclusion. 正确
(B) The first introduces a development that the argument predicts will have a certain outcome; the second is a state of affairs that the argument denies will be part of that outcome. 错
(C) The first presents a development that the argument predicts will have a certain outcome; the second acknowledges a consideration that weighs against that prediction. 错
(D) The first provides evidence to support a prediction that the argument seeks to defend; the second is that prediction. 错
(E) The first and the second each provide evidence to support the argument's main conclusion. 错

28. (31510-!-item-!-188;#058&004526)
First-time computer buyers buying PXC home computers typically buy models that cost much less and have a smaller profit margin per computer than do PXC computers bought by people replacing their computers with more powerful models.  Last year PXC's profits from computer sales were substantially higher than the previous year, although about the same number of PXC computers were sold and the prices and profit margins for each computer model that PXC sells remained unchanged.
逻辑链：第一次买电脑的人的利润比替换电脑的人的低； profit增加，但是数量和价格和每台电脑的边际利润没变
If the statements above are true, which of the following is most strongly supported by them?
(A) PXC's competitors raised the prices on their computers last year, making PXC computers more attractive to first-time computer buyers.无关
(B) The number of people buying PXC computers who also bought PXC computer-related products, such as printers, was larger last year than the previous year. 反前提
(C) Among computer buyers who bought a PXC computer to replace their existing computer, the proportion who were replacing a computer made by a competitor of PXC was greater last year than the previous year. 无关
(D) The proportion of PXC computers bought by first-time computer buyers was smaller last year than the previous year. 正确
(E) PXC's production costs for its computers were lower last year than they had been the previous year. 反前提

作者: 啊云苏苏 时间: 2015-9-5 20:11
1-7-1-weaken
1)计时：36.97（看懂了，可找不到逻辑关系）
分析：原来我逻辑链都搞错了。。。
P-BT和JT有95%的dna相似
C-BT在超级远的地方hatch
gap-很多生物的dna都很相似；juvenile怎么能游10000km这么远
逻辑链整清楚就明白为什么选D了
A irrelevant
B irrelevant
C irrelevant
D bingo！
E irrelevant

1-7-2-weaken
1)计时：58.93
2）逻辑链：
-P
两次P大幅度贬值，产品价格↓，D国出口↑
-C
为了↑D国出口，应该再让P贬值
3）Prephrase
重点该放在，即便货币贬值商品价格下降，在国际市场上也没有竞争力
4)选项分析：
A irrelevant
B（right，生产部门已经到顶峰了，货币再怎么贬值，export也没有多少上升空间了）
C irrelvant
D support
E（是个推测，不是事实，不能用来攻击结论）
选B

1-7-3-explain
1)计时：44.98
2）逻辑链：
-B
近百年P稳定增长
百年前，PS导致了↑MR，I导致了P↑
-P
I在持续↑，PS也变好了，但P没有多多少
3）Prephrase
人口老龄化；也有很多人搬走；经历了战争；出生率下降
4)选项分析：
A 不懂。。。
B bingo！
C irrelevant
D opposite
E irrelevant

1-7-4-boldface
1)计时：43.97
2）逻辑链：
-P1
EE的cost很高
-P2
noP'D↑，EE可能会普及
3）Prephrase
1是一个事实，2是可以忽略1的原因
4)选项分析：
A no
B no
C yes
D no
E no

1-7-5-support
1)计时：36.57
2）逻辑链：
-B
第一次买的人会买成本比较低的型号，利润也比较少；换电脑的人就会买更好的型号，利润也更高
-C
PXC's profits from computer sales↑，但数量，价格，PM都没变
-gap
那是什么促使利润↑？第一次买的人少了，换电脑的人多了
4)选项分析：
A opposite，销量没变
B 讨论的是电脑的利润
C irrelevant
D（right，总销量没变，但换电脑的人多了，第一次买的人少了）
E（边际利润没变，所以成本没变）
第一句话要读懂！！！

作者: kexiner 时间: 2016-2-19 11:13
1-7
【精练】
Loggerhead turtles live and breed in distinct groups, of which some are in the Pacific Ocean and some are in the Atlantic. New evidence suggests that juvenile Pacific loggerheads that feed near the Baja Peninsula hatch in Japanese waters 10,000 kilometers away. Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from turtles at the Japanese nesting sites.
Which one of the following, if true, most seriously weakens the reasoning above?
逻辑链： L乌龟live和breed在不同的group，一些在P洋，一些在大西洋。新证据显示juvenile的P乌龟feed靠近BAJA 半岛，在J洋中孵化。 95%DNA样本与在J nesting 地点的乌龟符合。
结论：New evidence suggests that juvenile Pacific loggerheads that feed near the Baja Peninsula hatch in Japanese waters 10,000 kilometers away.
weaken

Nesting sites of loggerhead turtles have been found the Pacific coast of North America Several thousand kilometers north of the Baja peninsula.

(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers.
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant.
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles.
同样与A洋的吻合说明不是在P洋的？
RIGHT
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years.
【逻辑链】
25. (30261-!-item-!-188;#058&004144)
Twelve years ago and again five years ago, there were extended periods when the Darfir Republic's currency, the pundra, was weak: its value was unusually low relative to the world's most stable currencies. Both times a weak pundra made Darfir's manufactured products a bargain on world markets, and Darfir's exports were up substantially. Now some politicians are saying that, in order to cause another similarly sized increase in exports, the government should allow the pundra to become weak again.
逻辑链：20年前，当D国的汇率 PUNDRA很低时，它的价值不寻常的低于世界上最稳定的货币。当时，D国产的东西很值得买在世界市场上，andD国的出口量也很大。现在，一些政客说，为了导致相同的效果增大出口，政府应当允许货币p再次贬值。

Which of the following, if true, provides the government with the strongest grounds to doubt that the politicians' recommendation, if followed, will achieve its aim?
Several of the politicians now recommending that the pundra be allowed to become weak made that same recommendation before each of the last two periods of currency weakness.
与lats periods currency weakness无关
(B) After several decades of operating well below peak capacity, Darfir's manufacturing sector is now operating at near-peak levels.
operating无关
--there is no space to have a increase in export--weaken--right
(C) The economy of a country experiencing a rise in exports will become healthier only if the country's currency is strong or the rise in exports is significant.

(D) Those countries whose manufactured products compete with Darfir's on the world market all currently have stable currencies.
其他国家无关
(E) A sharp improvement in the efficiency of Darfir's manufacturing plants would make Darfir's products a bargain on world markets even without any weakening of the pundra relative to other currencies.
right
--a improvement in the efficiency--irrelevant
26. (31045-!-item-!-188;#058&004365)
The population of Megacity, a sprawling metropolis in Remsland, has grown at a fairly steady rate for over a century. A hundred years ago, poor sanitation in the city caused high mortality rates among the city's inhabitants, and what fueled the population increase was immigration from rural villages. This immigration has continued and even increased. Moreover, in recent decades, city sanitation has improved enormously. Yet the city's population growth has not significantly accelerated.
Which of the following, if true, most helps to explain why the city's population growth rate has not changed?
M城市的人口，一直以很慢的增长速度生长。 100年前，poor卫生导致了高死亡率，导致了人口增长的是迁移到了rural villiages。这种迁移一直在继续。而且，在最近几十年，城市卫生提高了很多。然而城市人口增长率没有显著提升。
Mortality rates that were associated with poor sanitation in Megacity a hundred years ago were orders of magnitude higher than are mortality rates associated with vehicular traffic, which is currently a major cause of death in the city.
right
we should pay attention to the word ‘currently’, however, in the original text, it is ‘recent decades’
(B) For several decades, Megacity, as distinct from the countryside, has had a steadily declining birth rate.
这种decline不一定大于增长
Correct
(C) Cities smaller than Megacity have also experienced sustained population growth.
其他小城市无法对比
(D) The great majority of immigrants to Remsland settle in Megacity, at least initially.

(E) Megacity has long offered better employment prospects than most rural areas.
27. (31231-!-item-!-188;#058&004411)
Plant scientists have used genetic engineering on seeds to produce crop plants that are highly resistant to insect damage. Unfortunately, the seeds themselves are quite expensive, and the plants require more fertilizer and water to grow well than normal ones. Thus, for most farmers the savings on pesticides would not compensate for the higher seed costs and the cost of additional fertilizer. However, since consumer demand for grains, fruits, and vegetables grown without the use of pesticides continues to rise, the use of genetically engineered seeds of this kind is likely to become widespread.
In the argument given, the two portions in boldface play which of the following roles?

The first supplies a context for the argument; the second is the argument's main conclusion.

(B) The first introduces a development that the argument predicts will have a certain outcome; the second is a state of affairs that the argument denies will be part of that outcome.
(C) The first presents a development that the argument predicts will have a certain outcome; the second acknowledges a consideration that weighs against that prediction.
right
(D) The first provides evidence to support a prediction that the argument seeks to defend; the second is that prediction.
(E) The first and the second each provide evidence to support the argument's main conclusion.

28. (31510-!-item-!-188;#058&004526)
First-time computer buyers buying PXC home computers typically buy models that cost much less and have a smaller profit margin per computer than do PXC computers bought by people replacing their computers with more powerful models. Last year PXC's profits from computer sales were substantially higher than the previous year, although about the same number of PXC computers were sold and the prices and profit margins for each computer model that PXC sells remained unchanged.
If the statements above are true, which of the following is most strongly supported by them?
逻辑链：第一次购买电脑的买家买P电脑时倾向于买那些花费少和比更小的边际利润的model
卖出的数量一样的价格和边际利润也都相同
PXC's competitors raised the prices on their computers last year, making PXC computers more attractive to first-time computer buyers.

(B) The number of people buying PXC computers who also bought PXC computer-related products, such as printers, was larger last year than the previous year.
文中说computer的profit提高没有提及printer
(C) Among computer buyers who bought a PXC computer to replace their existing computer, the proportion who were replacing a computer made by a competitor of PXC was greater last year than the previous year.

(D) The proportion of PXC computers bought by first-time computer buyers was smaller last year than the previous year.
right 总量不变其中的成分含量变化
(E) PXC's production costs for its computers were lower last year than they had been the previous year.
The price and profit margin do not change

作者: Geranium_Bayy 时间: 2016-3-26 18:42

Loggerheadturtles live and breed in distinct groups, of which some are in the PacificOcean and some are in the Atlantic. New evidence suggests that juvenile Pacificloggerheads that feed near the Baja Peninsula hatch in Japanese waters 10,000kilometers away. Ninety-five percent of the DNA samples taken from the Bajaturtles match those taken from turtles at the Japanese nesting sites.

Which one of thefollowing, if true, most seriously weakens the reasoning above?

Background information: LT live in distinct groups.

Premise: LT hatch in Japanese waters & 95% DNAmatch that

Conclusion: LT live in Japanese waters

Weaken: the statistics of 95% can’t say anything./other places also as same as or even larger than 95% DNA match.

(A) Nestingsites of loggerhead turtles have been found the Pacific coast of North AmericaSeveral thousand kilometers north of the Baja peninsula. Irrelevant

(B) The distancebetween nesting sites and feeding sites of Atlantic loggerhead turtles is lessthan 5,000 kilometers. Irrelevant

(C) Loggerheadhatchlings in Japanese waters have been declining in number for the last decadewhile the number of nesting sites near the Baja peninsula has remainedconstant. Irrelevant

(D) Ninety-fivepercent of the DNA samples taken from the Baja turtles match those taken fromAtlantic loggerhead turtles. Correct

(E) Commercialaquariums have been successfully breeding Atlantic loggerheads with Pacificloggerheads for the last five years. Irrelevant

25.(30261-!-item-!-188;#058&004144)

Twelve years agoand again five years ago, there were extended periods when the DarfirRepublic's currency, the pundra, was weak: its value was unusually low relative to the world's most stable currencies. Both times a weak pundra made Darfir'smanufactured products a bargain on world markets, and Darfir's exports were upsubstantially. Now some politicians aresaying that, in order to cause another similarly sized increase in exports, thegovernment should allow the pundra to become weak again.

Background: the currency of D country was weaken twice and during these period itsexport went well.

Premise: the weaken currency results in the boom export.

Conclusion: In order to cause another similar increasein export, the government should allow its currency to become weaken again.

Weaken: 1、there areother factors that cause such an increase. And the weaken currency is an accidentalevent

2、there is a dramatic change over theglobal economical environment, and the weaken currency is not useful any more.

3、there is no room for manufacture todevelop.

Which of thefollowing, if true, provides the government with the strongest grounds to doubtthat the politicians' recommendation, if followed, will achieve its aim?

(A) Several ofthe politicians now recommending that the pundra be allowed to become weak madethat same recommendation before each of the last two periods of currencyweakness. Strengthen

(B) After several decades ofoperating well below peak capacity, Darfir's manufacturing sector is nowoperating at near-peak levels. Correct,the manufacturing sector is at peak, even though the government weak thecurrency, there is no more extra increase.

(C) The economyof a country experiencing a rise in exports will become healthier only if thecountry's currency is strong or the rise in exports is significant. Irrelevant, we do not talk aboutthe healthy economy.

(D) Thosecountries whose manufactured products compete with Darfir's on the world marketall currently have stable currencies. Irrelevantcomparison

(E) A sharpimprovement in the efficiency of Darfir's manufacturing plants would makeDarfir's products a bargain on world markets even without any weakening of thepundra relative to other currencies. We stilldon’t know what will happen if P is weaken.

26.(31045-!-item-!-188;#058&004365)

The populationof Megacity, a sprawling metropolis in Remsland, has grown at a fairly steadyrate for over a century. A hundred yearsago, poor sanitation in the city caused high mortality rates among the city'sinhabitants, and what fueled the population increase was immigration from ruralvillages. This immigration has continuedand even increased. Moreover, in recentdecades, city sanitation has improved enormously. Yet the city's population growth has notsignificantly accelerated.

Which of thefollowing, if true, most helps to explain why the city's population growth ratehas not changed?

Background information: the mortality in the countryand immigration from rural areas compensated its declining people. And theimmigration people is continued to increase.

Premise: the total population will increaseeventually

Conclusion: the city’s population has not increased.

Explanation: there are other factors affect thepopulation, such as birth rate.

(A) Mortalityrates that were associated with poor sanitation in Megacity a hundred years agowere orders of magnitude higher than are mortality rates associated withvehicular traffic, which is currently a major cause of death in the city.Irrelevant, we do not talk about the cause oftraffic.

(B) For several decades,Megacity, as distinct from the countryside, has had a steadily declining birthrate. Correct.

(C) Citiessmaller than Megacity have also experienced sustained population growth. Irrelevant comparison & strengthen

(D) The greatmajority of immigrants to Remsland settle in Megacity, at least initially. Beyond scope

(E) Megacity haslong offered better employment prospects than most rural areas. We do not talk about employment.

27.(31231-!-item-!-188;#058&004411)

Plant scientists have used genetic engineeringon seeds to produce crop plants that are highly resistant to insect damage. Unfortunately,the seeds themselves are quite expensive, and the plants require morefertilizer and water to grow well than normal ones. Thus, for most farmers thesavings on pesticides would not compensate for the higher seed costs and thecost of additional fertilizer. However,since consumer demand for grains, fruits, and vegetables grown without the useof pesticides continues to rise, the use of genetically engineered seeds ofthis kind is likely to become widespread.

In the argumentgiven, the two portions in boldface play which of the following roles?

(A) The firstsupplies a context for the argument; the second is the argument's mainconclusion.

(B) The firstintroduces a development that the argument predicts will have a certainoutcome; the second is a state ofaffairs that the argument denies will be part of that outcome.

(C) The first presents adevelopment that the argument predicts will have a certain outcome; the secondacknowledges a consideration that weighs against that prediction.

(D) The firstprovides evidence to support a prediction that the argument seeks to defend;the second is that prediction.

(E) The firstand the second each provideevidence to support the argument's main conclusion.

28.(31510-!-item-!-188;#058&004526)

First-timecomputer buyers buying PXC home computers typically buy models that cost muchless and have a smaller profit margin per computer than do PXC computers boughtby people replacing their computers with more powerful models. Last year PXC's profits from computersales were substantiallyhigher than the previous year, although about the same number of PXCcomputers were sold and the prices and profit margins for each computer modelthat PXC sells remained unchanged.

If thestatements above are true, which of the following is most strongly supported bythem?

Background: first-time computer buyers buy computer modelscheaper than those who want to replace the computer. 2、theprofit is larger than previous year. 3、there areno change in the number , the price, and the profit of computers.

(A) PXC's competitors raised the prices ontheir computers last year, making PXC computers more attractive to first-timecomputer buyers. We don’t know the outcome of the option:making PXC more attractive. If this is true, then the numberof computers sole by PXC last year should increase.

(B) The numberof people buying PXC computers who also bought PXC computer-related products,such as printers, was larger last year than the previous year. We don’ttalk about computer-related products. Also, they can buy it last year andprevious year, whatever.

(C) Amongcomputer buyers who bought a PXC computer to replace their existing computer,the proportion who were replacing a computer made by a competitor of PXC wasgreater last year than the previous year. We don’tknow the exact number.

(D) The proportion of PXCcomputers bought by first-time computer buyers was smaller last year than theprevious year. First-time users buylow-price models for PXC computers, while people who replace their computerswill buy high-price models. correct

(E) PXC'sproduction costs for its computers were lower last year than they had been theprevious year.

作者: hedyail 时间: 2016-8-13 11:58
D7 错2对3，放下速度后，准确率有所提升，不过boldface题看答案后还是有点不太懂

精炼
BG:Some of L live in P,others in A
PRE:95% of DNA samples taken from Baja L match those L at Japanese nesting sites
CON:juvenile PL hatch in Japan
WEAKEN

(A) Nesting sites of loggerhead turtles have been found the Pacific coast of North America Several thousand kilometers north of the Baja peninsula. - not related
(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers. - not related, it is about AL
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant. - about hatchling,not related
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles. - 如果都匹配的话，可能就跟Japan没关系了？
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years. -not realted
T 58s
D

逻辑链
T1 40s
PRE:12 years and 5 years ago, the currency of P was weak. And both times exports were up.
CON:the value should be weak in order to cause increase in exports
猜想：other factors push exports; have some drawbacks when the value go down
E B有点像，ACD无关 b

T2 30s
BG:100 years ago, the city has poor sanitation and higher mortality rates. City increases its poplutaion by immigration of rural people.
PRE:Now better sanitation system and increased immigration
CON:The city's population remain the same growht rate
猜想:local people move to other cities
EXPLAIN
B CDE排除，A迷惑，但不说明死亡率下降

T3 40s
PRE:the seed can help produce crop plants that are resistant to insect damage. But the seed and further fertilizer and water are expensive. Farmers seldonm buy.
PRE:consumer want plants without the use of pesticides
CON:Use of seeds will become widespread
BOLDFACE
A c

T4 1:11min
PRE:First-time buyers buy cheaper PXC models, which have smaller profit margin.
PRE

ast year PXC profit is higher, although same number were sold and price unchanged
Support
D

作者: AstridHua 时间: 2017-7-28 17:29
向各位大神提个问题
第28题我第一次做的时候选了d，但是再研究逻辑链的时候觉得d有点问题。
题目中说about the same number of PXC computers were sold and the prices and profit margins for each computer model that PXC sells remained unchanged，如果d选项正确，那么买smaller profit margin models 的少于powerful models（which assumed to be"higher profit margin models), 则在电脑售价相同，数量相同的情况下，总的profit margin会提高啊，d选项不就和原文给出的premise不相符了么？
求解！谢谢大神！

作者: 宋痂岛__ 时间: 2017-12-9 13:01
BBBCD
第一题做错了

作者: May97 时间: 2018-1-20 09:15
T: 25s
Loggerhead turtles live and breed in distinct groups, of which some are in the Pacific Ocean and some are in the Atlantic. --->background
New evidence suggests that juvenile Pacific loggerheads that feed near the Baja Peninsula hatch in Japanese waters 10,000 kilometers away. --->conclusion
Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from turtles at the Japanese nesting sites.--->Premise
Weaken: Baja turtules are not loggerheads
(A) Nesting sites of loggerhead turtles have been found the Pacific coast of North America Several thousand kilometers north of the Baja peninsula.--->irreverent.在其他地方存在nesting sites, 不代表loggerheads 不在日本 hatch
(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers.--->irreverent
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant.--->直接说了loggerhend hatch in Japanese
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles.--->Correct
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five years. --->irreverent

25. T: 44s
Twelve years ago and again five years ago, there were extended periods when the Darfir Republic's currency, the pundra, was weak:  its value was unusually low relative to the world's most stable currencies.--->background
Both times a weak pundra made Darfir's manufactured products a bargain on world markets, and Darfir's exports were up substantially. --->premise
Now some politicians are saying that, in order to cause another similarly sized increase in exports, the government should allow the pundra to become weak again.--->conclusion
Weaken:
(A) Several of the politicians now recommending that the pundra be allowed to become weak made that same recommendation before each of the last two periods of currency weakness.--->irreverent
(B) After several decades of operating well below peak capacity, Darfir's manufacturing sector is now operating at near-peak levels.--->correct
(C) The economy of a country experiencing a rise in exports will become healthier only if the country's currency is strong or the rise in exports is significant.--->irreverent
(D) Those countries whose manufactured products compete with Darfir's on the world market all currently have stable currencies.--->support
(E) A sharp improvement in the efficiency of Darfir's manufacturing plants would make Darfir's products a bargain on world markets even without any weakening of the pundra relative to other currencies.--->irreverent

26. T: 34s
The population of Megacity, a sprawling metropolis in Remsland, has grown at a fairly steady rate for over a century. --->background
A hundred years ago, poor sanitation in the city caused high mortality rates among the city's inhabitants, and what fueled the population increase was immigration from rural villages.--->premise
This immigration has continued and even increased.  Moreover, in recent decades, city sanitation has improved enormously.--->premise
Yet the city's population growth has not significantly accelerated.--->conclusion
EP:
(A) Mortality rates that were associated with poor sanitation in Megacity a hundred years ago were orders of magnitude higher than are mortality rates associated with vehicular traffic, which is currently a major cause of death in the city.--->correct
(B) For several decades, Megacity, as distinct from the countryside, has had a steadily declining birth rate.--->即使出生率低人口依然会增加
(C) Cities smaller than Megacity have also experienced sustained population growth.--->irreverent
(D) The great majority of immigrants to Remsland settle in Megacity, at least initially.--->weaken
(E) Megacity has long offered better employment prospects than most rural areas.--->weaken

27. T:40s
Plant scientists have used genetic engineering on seeds to produce crop plants that are highly resistant to insect damage.  Unfortunately, the seeds themselves are quite expensive, and the plants require more fertilizer and water to grow well than normal ones.  Thus, for most farmers the savings on pesticides would not compensate for the higher seed costs and the cost of additional fertilizer.  However, since consumer demand for grains, fruits, and vegetables grown without the use of pesticides continues to rise, the use of genetically engineered seeds of this kind is likely to become widespread.
BF:
(A) The first supplies a context for the argument; the second is the argument's main conclusion.--->correct
(B) The first introduces a development that the argument predicts will have a certain outcome; the second is a state of affairs that the argument denies will be part of that outcome.
(C) The first presents a development that the argument predicts will have a certain outcome; the second acknowledges a consideration that weighs against that prediction.
(D) The first provides evidence to support a prediction that the argument seeks to defend; the second is that prediction.--->the first doesn't support the second
(E) The first and the second each provide evidence to support the argument's main conclusion.--->the second shi conclusion

28. T: 39s
First-time computer buyers buying PXC home computers typically buy models that cost much less and have a smaller profit margin per computer than do PXC computers bought by people replacing their computers with more powerful models.
Last year PXC's profits from computer sales were substantially higher than the previous year, although about the same number of PXC computers were sold and the prices and profit margins for each computer model that PXC sells remained unchanged.
(A) PXC's competitors raised the prices on their computers last year, making PXC computers more attractive to first-time computer buyers.--->number changes
(B) The number of people buying PXC computers who also bought PXC computer-related products, such as printers, was larger last year than the previous year.--->correct
(C) Among computer buyers who bought a PXC computer to replace their existing computer, the proportion who were replacing a computer made by a competitor of PXC was greater last year than the previous year.--->number changes
(D) The proportion of PXC computers bought by first-time computer buyers was smaller last year than the previous year.--->irreverent
(E) PXC's production costs for its computers were lower last year than they had been the previous year.--->profit margins change

作者: echo-LUO 时间: 2018-9-15 22:27
1. 精炼: WEAKEN
Background Information: a kind of turtles live and breed in different groups at somewhere in pacific & atlantic
Premise:95% DNA taken in Baja peninsula match those turtles at japanese nesting sites
Conclusion: juvenile turtles feed near Baja hatch in Japanese waters

(A) Nesting sites of loggerhead turtles have been found the Pacific coast of North America Several thousand kilometers north of the Baja peninsula.
(B) The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers.
(C) Loggerhead hatchlings in Japanese waters have been declining in number for the last decade while the number of nesting sites near the Baja peninsula has remained constant.
(D) Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles.
(E) Commercial aquariums have been successfully breeding Atlantic loggerheads with Pacific loggerheads for the last five
选择：D Since the DNA can match turtles in Atlantic, we can also say juvenile turtles feed in Baja hatch in Atlantic. effectively weaken the conclusion above

逻辑链：
25. WEAKEN
Background Information: there are 2 period in Darfir Republic's history when the currency was weak, which led to the increase of Darfir's exports.
Premise: aim at increasing the exports again
conclusion: the government should allow the currency to become weak again.
猜想：1）两短历史时期的特殊条件；2）今时不同往日，降低汇率可能并不会提高出口；3）现在的出口量已经很高，无法再高了
(B) After several decades of operating well below peak capacity, Darfir's manufacturing sector is now operating at near-peak levels.
选项：B this answer shows that Darfir cannot manufacture more products for export, so it can not achieve the aim hoping weak currency can increase exports.

26.
background information: in the past, although poor sanitation in M caused high mortality rates, immigration form rural village fuel the population
premise: today, the sanitation has been improved and immigration is still incresing
conclusion: In recent decades, the city's population has not significantly accelerated
猜想：不仅有流入和本地增长，可能因为经济原因或政策，很多本地人口外流
(B) For several decades, Megacity, as distinct from the countryside, has had a steadily declining birth rate.
选项：B this is the only choice which can explain why the population stay steadily.

27.
background information: farmers refused to use seeds that are improved to survive without pesticides
because they require higher cost.
premise: but theses days, people prefer grains, fruits, and vegetables grown without the use of pesticides
conclusion: therefore, more farmers will be willing to use improved seeds
1 boldface: Unfortunately, the seeds themselves are quite expensive, and the plants require more fertilizer and water to grow well than normal ones. [ explanation for not using those expensive seeds ]
2 boldface: However, since consumer demand for grains, fruits, and vegetables grown without the use of pesticides continues to rise, the use of genetically engineered seeds of this kind is likely to become widespread. [ conclusion ]
(A) The first supplies a context for the argument; the second is the argument's main conclusion.
选项：A the first boldface is part of the background information, the second boldface is what this context what to illustrate
正确答案：C
(C) The first presents a development that the argument predicts will have a certain outcome; the second acknowledges a consideration that weighs against that prediction.
选错原因：忽略了文中非常重要的一句话“ Thus, for most farmers the savings on pesticides would not compensate for the higher seed costs and the cost of additional fertilizer.”，这是第一个boldface得出的预测，但是后面另一个原因推翻了这个预测，给出了相反的预测。所以答案应该是C。
A选项错误的原因，第一个boldface支持的prediction并不是conclusion的argument

28.
background information: first-time buyers cost less and have smaller profit margin per computer than those non-first-time buyers
premise: profits grow but the sales volume and profit margin did't increase.
猜想：配件销售
(B) The number of people buying PXC computers who also bought PXC computer-related products, such as printers, was larger last year than the previous year.
选项：B
正确选项：D
(D) The proportion of PXC computers bought by first-time computer buyers was smaller last year than the previous year.
错选原因：这种题目要在文中找支持。因为第一次购买的price和margin profic低，所以第一次买的人少了，不是第一次的人就多了，profits increase
B选项是我自己想出来的文中没有支持的，但配件能卖多少？配件的利润高不高？这些都不确定

作者: 喜皮 时间: 2018-12-10 19:40
1.--->44s
premise：because the gene of the turtles who are taken back from the Japanese Ocean is 95% similar to the turtle taken from the island.
conlusion:The longhead turtle hatch back to Japanese ocean in 1000km
bg:some info about the turtles.
prephrase:【mix up correlation and causation】weaken--->the result is not true/other reasons why 95% similarity/accidental thing
在这道题应该怀疑数据的可靠性，根据常识，大多数种类的基因是共通的。（这里是他因）
Airrelevent
Birrelevent
Cright
Dirrelvent
Eirrelevent
C选项偷换概念，将numbers、quantity换成了sites
D说第三种龟也跟他们有相同程度相似的基因

作者: 喜皮 时间: 2018-12-10 20:26
感觉我是思路错了，有时候想的太复杂，其实最重要的还是读懂premise和conclusion再从题干上切入，不拐弯抹角直接针对conclusion（weaken、support）
2.--->46s
(A) Several of the politicians now recommending that the pundra be allowed to become weak made that same recommendation before each of the last two periods of currency weakness.
(B) After several decades of operating well below peak capacity, Darfir's manufacturing sector is now operating at near-peak levels.
(C) The economy of a country experiencing a rise in exports will become healthier only if the country's currency is strong or the rise in exports is significant.
(D) Those countries whose manufactured products compete with Darfir's on the world market all currently have stable currencies.
(E) A sharp improvement in the efficiency of Darfir's manufacturing plants would make Darfir's products a bargain on world markets even without any weakening of the pundra relative to other currencies.
E
- (e) irrelevant: the question asks us to undermine the politician's suggestion, not to suggest an alternative.不是提另一种选择方案
（c）is concerned with the effects of a rise in exports, and really has nothing to do with the cause of that rise. therefore, we can't tell whether it will have anything to do with the original aim of the recommendation.与题目要求不符
OA:B就算是weak again也没法加大出口量，因为生产能力有限。

3.--->29s
A) Mortality rates that were associated with poor sanitation in Megacity a hundred years ago were orders of magnitude higher than are mortality rates associated with vehicular traffic, which is currently a major cause of death in the city.
(B) For several decades, Megacity, as distinct from the countryside, has had a steadily declining birth rate.
(C) Cities smaller than Megacity have also experienced sustained population growth.
(D) The great majority of immigrants to Remsland settle in Megacity, at least initially.
(E) Megacity has long offered better employment prospects than most rural areas.

A
OA:B
now, SPECIFY what a correct answer needs to do:
A correct answer must work AGAINST population growth.虽然这里是explain题，但是可以用weaken的思路！！

basically, there are only three possibilities in the whole universe:
1/ More people are leaving (the passage mentions only immigration, not emigration);
2/ Not as many people are being born;
3/ More people are dying for some NEW reason.

(it's not ALWAYS possible to come up with such exact specifications... but, IF YOU CAN, you always should!)

once you have this, you can take one glance at choice A and say 'hmm, that's something that works TOWARD population growth.'
i.e., you want 'black', and A is 'white'.

4.--->28s
A) The first supplies a context for the argument; the second is the argument's main conclusion.
(B) The first introduces a development that the argument predicts will have a certain outcome; the second is a state of affairs that the argument denies will be part of that outcome.
(C) The first presents a development that the argument predicts will have a certain outcome; the second acknowledges a consideration that weighs against that prediction.
(D) The first provides evidence to support a prediction that the argument seeks to defend; the second is that prediction.
(E) The first and the second each provide evidence to support the argument's main conclusion.

C

5.--->45s
(A) PXC's competitors raised the prices on their computers last year, making PXC computers more attractive to first-time computer buyers.
(B) The number of people buying PXC computers who also bought PXC computer-related products, such as printers, was larger last year than the previous year.
(C) Among computer buyers who bought a PXC computer to replace their existing computer, the proportion who were replacing a computer made by a competitor of PXC was greater last year than the previous year.
(D) The proportion of PXC computers bought by first-time computer buyers was smaller last year than the previous year.
(E) PXC's production costs for its computers were lower last year than they had been the previous year.

A
OA:D
遗漏了题目第一句First-time computer buyers buying PXC home computers typically buy models that cost much less and have a smaller profit margin per computer than do PXC computers bought by people replacing their computers with more powerful models.背景也很重要啊！！！而且这个还是must be true题……题干也没看清

作者: 云栈 时间: 2019-10-26 05:30
1. 42s
B：L乌龟居住在P或者A
P：B的乌龟的95%的DNA和日本海的一样
C：在B生长的的青年乌龟是在10000km外的日本海附近孵化的
推测：A的DNA也有95%和B的一样
选项分析：D
A: 乌龟在别的地方被发现与结论无关
B：A的乌龟的习性和B的无关
C: 可能B不光有日本海的乌龟还有别的地方的乌龟，但不能说明日本的乌龟没跑到B去
D: 证明B和A的乌龟也很像，也可能是从A跑来的不是从日本海
E: 无关

2. 40s
B：12年钱和5年前D的钱价值分别变低。
P：这两次变低都使得D的出口量增加
C：如果想使得D的出口增加就要降低他们的钱的价值
推测：因果关系颠倒了；证明即使钱变week，出口也不会增加
选项分析:B

3. 40s
B：M的人口稳步增长。 100年前因为卫生问题，这里的人口死亡里很高，后来周边村子的人移居到这里。
P：人口在持续增长，卫生状况也变好了
P: 然而人口增长速度没有变高
推测：村子里的人已经适应了卫生条件差的环境，卫生条件不会影响他们的死亡率，也不会影响增长率；出生率降低
选项分析：B

4. 50s
P: 科学家在crop的种子上用基因工程可以highly抵抗害虫
P: 然而这种种子和所需的肥料都很贵
P：农民从杀虫剂上省的钱还不够买种子和种子肥料
P：然而对于不用杀虫剂长大的植物的需求量变高，这种基因种子的使用将会被推广
第一部分讲了这个种子的缺点，用来反驳conclusion；第二部分support conclusion and conclusion
选项分析：C

5．50s
B：第一次买电脑的人一般会买比换电脑的人买的便宜并且利润低的电脑
P：去年电脑的利润比前一年明显高。价格没变，数量变化不大
推测：换电脑的人比第一次买电脑的多
选项分析：D

作者: Lincy123 时间: 2020-4-23 00:15

P：95%的B乌龟的DNA和日本海域的乌龟相符

C：太平洋的B乌龟在日本海域产卵

果因推理，找他因削弱。

A）乌龟的窝在太平洋。无关

B）吃的地方和产卵地方距离5000.无关

C）日本水域产卵数量降低。B岛保持不变。无关

D）95%的B乌龟的DNA和Atlantic的乌龟相符。Correct

E） A和P可以一起breed

P：weak pundra

C：D国的出口量增长

削弱pundra和出口量的关系：找出口增长的他因

A）让pundra weak的政治家过去几年也提出相同意见。无关

B） D国的制造业已经达到巅峰 – 待定

因为已经达到巅峰了，就算weak货币，也无法增加出口

C）只有当货币强或者出口增长显著的情况下，出口经济增长才更健康。增强

D）跟D国竞争制造业的其他国家都有稳定的货币。无关

E） D国制造业的高效率也可以增长出口量。Correct

错误，因为不能削弱货币的作用

城市卫生改善了很多，城市人口这几十年没有显著增长

Gap：可能有卫生之外的他因、城市居民搬走等

A）交通事故是致死原因 correct

选项强调的是currently，但是结论是decades

B）乡下出生率低。和城市无关

看错了，是城市出生率低，correct

C）比M城小的也有这个问题。无关

D）大量移民进入城市 – 重复原题，增强

E）城市比农村工作好 – 无关

B1:转基因种子很贵，需要更多肥料和水

B2:因为需求多，转基因种子很可能大量使用 – 作者论据+观点

B1和B2是对立的

A） B1是b2的背景，错

B）第二个是作者否认的，错

C） Correct

D）变成b1支持b2了，错

E）两个都是论据，错

PXC电脑的售价、毛利和数量不变

去年PXC的销售利润比前几年都高

Gap：毛利不变说明与价格和成本无关，可能非首次购买的人增加

A）竞争对手涨价。无关，因为销售数量不变

B）买电脑周边的变多了。无关，题目讨论电脑

C）替换竞争对手的电脑的人的比例增加。无关

D）第一次购买的人比例减少。Correct

E）成本降低，无关。

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