【每日逻辑练习第二季【2-4】

balapupu · 发表于 2011-12-13 09:37:20

最近事儿多~~~不多说~~放题！！！
[精练]
1. According to the theory of continental drift, in
prehistoric times, many of today’s separate
continents were part of a single huge landmass. As
the plates on which this landmass rested began to
move, the mass broke apart, and ocean water filled
the newly created chasms. It is hypothesized, for
example, that South America was once joined on its
east coast with what is now the west coast of Africa.
Which one of the following discoveries, if it were
made, would most support the above hypothesis
about South America and Africa?
(A) A large band of ancient rock of a rare type
along the east coast of South America is of
the same type as a band on the west coast of
Africa.
(B) Many people today living in Brazil are
genetically quite similar to many western
Africans.
(C) The climates of western Africa and of the east
coast of South America resemble each other.
(D) Some of the oldest tribes of people living in
eastern South America speak languages
linguistically similar to various languages
spoken by certain western African peoples.
(E) Several species of plants found in western
Africa closely resemble plants growing in
South America.

【逻辑链】
21. (28114-!-item-!-188;#058&003832)

Film Director: It is true that certain characters and plot twists in my newly released film The Big Heist are strikingly similar to characters and plot twists in Thieves, a movie that came out last year. Based on these similarities, the film studio that produced Thieves is now accusing me of taking ideas from that film. The accusation is clearly without merit. All production work on The Big Heist was actually completed months before Thieves was released.

Which of the following, if true, provides the strongest support for the director's rejection of the accusation?

(A) Before Thieves began production, its script had been circulating for several years among various film studios, including the studio that produced The Big Heist.
(B) The characters and plot twists that are most similar in the two films have close parallels in many earlier films of the same genre.
(C) The film studio that produced Thieves seldom produces films in this genre.
(D) The director of Thieves worked with the director of The Big Heist on several earlier projects.
(E) The time it took to produce The Big Heist was considerably shorter than the time it took to produce Thieves.

22. (28162-!-item-!-188;#058&003858)

Herbicides allow cereal crops to be grown very efficiently, with virtually no competition from weeds. In Britain, partridge populations have been steadily decreasing since herbicide use became widespread. Some environmentalists claim that these birds, which live in and around cereal crop fields, are being poisoned by the herbicides. However, tests show no more than trace quantities of herbicides in partridges on herbicide-treated land. Therefore, something other than herbicide use must be responsible for the population decrease.

Which of the following, if true about Britain, most seriously weakens the argument?

(A) The elimination of certain weeds from cereal crop fields has reduced the population of the small insects that live on those weeds and that form a major part of partridge chicks' diet.
(B) Since partridges are valued as game birds, records of their population are more carefully kept than those for many other birds.
(C) Some of the weeds that are eliminated from cereal crop fields by herbicides are much smaller than the crop plants themselves and would have no negative effect on crop yield if they were allowed to grow.
(D) Birds other than partridges that live in or around cereal crop fields have also been suffering population declines.
(E) The toxins contained in herbicides typically used on cereal crops can be readily identified in the tissues of animals that have ingested them.

23. (28303-!-item-!-188;#058&003943)

A product that represents a clear technological advance over competing products can generally command a high price. Because technological advances tend to be quickly surpassed and companies want to make large profits while they still can, many companies charge the maximum possible price for such a product. But large profits on the new product will give competitors a strong incentive to quickly match the new product's capabilities. Consequently, the strategy to maximize overall profit from a new product is to charge less than the greatest possible price.

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

(A) The first is a consideration that has been raised to argue that a certain strategy is counterproductive; the second presents that strategy.
(B) The first is a consideration raised to support the strategy that the argument recommends; the second presents that strategy.
(C) The first is a consideration raised to explain the appeal of a certain strategy; the second presents that strategy.
(D) The first is an assumption, rejected by the argument, that has been used to justify a course of action; the second presents that course of action.
(E) The first is a consideration that has been used to justify pursuing a goal that the argument rejects; the second presents a course of action that has been adopted in pursuit of that goal.

24. (28903-!-item-!-188;#058&004064)

Although exposure to asbestos is the primary cause of mesothelioma, a slow-developing cancer, researchers believe that infection by the SV40 virus is a contributing cause, since in the United States 60 percent of tissue samples from mesotheliomas, but none from healthy tissue, contain SV40. SV40 is a monkey virus; however, in 1960 some polio vaccine was contaminated with the virus. Researchers hypothesize that this vaccine was the source of the virus found in mesotheliomas decades later.

Which of the following, if true, most strongly supports the researchers' hypothesis?

(A) SV40 is widely used as a research tool in cancer laboratories.
(B) Changes in the technique of manufacturing the vaccine now prevent contamination with SV40.
(C) Recently discovered samples of the vaccine dating from 1960 still show traces of the virus.
(D) In a small percentage of cases of mesothelioma, there is no history of exposure to asbestos.
(E) In Finland, where the polio vaccine was never contaminated, samples from mesotheliomas do not contain SV40.

balapupu · 发表于 2011-12-13 09:38:37

Strengthen Problem Set Answer Key
All answer keys in this book will indicate the source of the question by giving the month and year the
LSAT was originally administered, the Logical Reasoning section number, and the question number within
that section. Each LSAT has two Logical Reasoning sections, and so the Section 1 and Section 2
designators will refer to the first or second Logical Reasoning section in the test, not the physical section
number of the booklet.
Question #1. Strengthen. June 2003 LSAT, Section 1, #11. The correct answer choice is (A)
The theory discussed in the stimulus is a real scientific hypothesis, often called the “Pangaea Theory.”
Alfred Wegener, who has been the subject of other LSAT questions, theorized in 1915 that Pangaea was a
“supercontinent” composed of all landmasses. The theory is attractive because when the shape of today’s
continents is examined, the continents roughly fit together.
The question stem specifically asks you to strengthen the hypothesis that South America and Africa were
once joined. To do so, you must identify evidence about the landmasses, as this is the evidence that the
hypothesis in the stimulus relies upon.
Answer choice (A): This is the correct answer, and this is the only answer that addresses the land. By tying
the rock strata of each continent together, the answer supports the idea that there was once a physical
connection between the two continents. A high percentage of test takers correctly identify this answer.
Answer choice (B): This answer addresses people, not land. As with the earlier turtle question, the genetic
similarity could be the result of humans from different areas sharing a large amount of DNA.
Answer choice (C): The similarity of climates does not help establish that the landmasses were once
connected. For example, the similarity could be the result of both continents largely straddling the equator.
Answer choice (D): The language of the people does not mean the continents were connected. Australians
and Americans share the same language, but this is because both areas were populated in modern times by
English-speaking people from Britain.
Answer choice (E): The resemblance of plants in both areas does not suggest or strengthen the idea that
the continents were joined. Plant similarities could be the result of climate, or perhaps of man-made
propagation efforts.

逻辑链：21. B 22. A 23. C 24. E

fox0923 · 发表于 2011-12-13 10:12:50

占位第一个~~bala辛苦了，bala加油！------------------------------------------------------------
精练------------------38s--------------------support
P: The continents are separated, and the ocean water filled in after breaking to chasms.
C: It's hypothesized that the south Africa was joined the east coast with what is now the west Africa.
Prephrase: South Africa was separated continent and formed a chasm.

Analysis:
(A) A large band of ancient rock of a rare type
along the east coast of South America is of
the same type as a band on the west coast of
Africa.-------------------------------------------------------------the similarity of rocks between types of east coast and west coast helps to support the conclusion because this evidence shows the geographic similarity.
(B) Many people today living in Brazil are
genetically quite similar to many western
Africans.----------------------------------------------------------genetically similar can be caused by various reasons, such as ancestors travelled from western Africans to Brazil.
(C) The climates of western Africa and of the east
coast of South America resemble each other.--------------the climates are the same doesn't help to support the conclusion.
(D) Some of the oldest tribes of people living in
eastern South America speak languages
linguistically similar to various languages
spoken by certain western African peoples.------------------language speaking doesn't explain the join of continents.
(E) Several species of plants found in western
Africa closely resemble plants growing in
South America.-----------------------------------------------------plants are resembled with each other can be caused by geography or climates.

balapupu · 发表于 2011-12-13 11:29:57

哈哈~~~应该的啦~~~恩~~·一起加油~~

1.【34s】
P：In old times, the separate continents were gathered to become a one land-->than the separate land begin to move, the large land broke apart? the example of SA once joined with the Africa.
Support: those two places have the same animal species.
A

A) A large band of ancient rock of a rare type
along the east coast of South America is of
the same type as a band on the west coast of
Africa.-->R
(B) Many people today living in Brazil are
genetically quite similar to many western
Africans.-->”many”->wrong, and there is no evidence to prove that time human already exist.
(C) The climates of western Africa and of the east
coast of South America resemble each other.-->there are many other factors to influence the climate.
(D) Some of the oldest tribes of people living in
eastern South America speak languages
linguistically similar to various languages
spoken by certain western African peoples.-->”some“--wrong, same as B
(E) Several species of plants found in western
Africa closely resemble plants growing in
South America.-->”several”--worng.

南瓜0729 · 发表于 2011-12-13 11:56:46

1.45s
P:according to continental drift theory, the continents nowadays were a single one.
then it broke and water filled.
C:southern American and west Africa were from a same mass.
P(support): unique and same things exist in both parts.
A
A bingo
B people are similar错 irrelevant
C climate错 irrelevant
D tribes错同B
E plants错

21.47s
p：characters and plots in T and B are similar. So the studio accuse me of take the idea of T
C: this is ridiculous，because B was completed before T
p(support):sth can prove that B doesn't cope the idea.
B
A weaken
B bingo
C cannot support
D cannot support
E irrelevant

22.45s
P：they use herbicide and then they found the decline of birds.
sub-C: some people claim that herbicide kills the birds.
P: tests show no more than trace herbicide.
C

ther things are responsible for the decrease of birds.
P(weaken): it is herbicide that poisons birds.
D---->A D选项无关~ 想到原来做过的一道题和D选项很像不过有定语的看到D就激动了一下
A support
B support
C irrelevant
D bingo
E support现在读题怎么那么慢！！！

LIAOYA · 发表于 2011-12-13 17:28:55

怎么看不到选项

zz42050524 · 发表于 2011-12-13 18:55:39

这道之前逻辑链做了，，，今天偷懒下

xeyyxzty · 发表于 2011-12-13 21:40:50

哎~今天不想做呀~坚持吧1.
B: According to the theory of continental drift, in prehistoric times, many of today’s separate continents were part of a single huge landmass. As the plates on which this landmass rested began to move, the mass broke apart, and ocean water filled the newly created chasms.
P:???
C:that South America was once joined on its east coast with what is now the west coast of Africa.
creatures are almost same on the two continents along the coast line
(A) A large band of ancient rock of a rare type along the east coast of South America is of the same type as a band on the west coast of Africa.
--right
(B) Many people today living in Brazil are genetically quite similar to many western Africans.
--irrelevant
(C) The climates of western Africa and of the east coast of South America resemble each other.
--irrelevant
(D) Some of the oldest tribes of people living in eastern South America speak languages linguistically similar to various languages spoken by certain western African peoples.
--prehistoric times--irrelevant
(E) Several species of plants found in western Africa closely resemble plants growing in South America.

--uncertain--C->E
预测错了
Answer choice (A): This is the correct answer, and this is the only answer that addresses the land. By tying the rock strata of each continent together, the answer supports the idea that there was once a physical connection between the two continents. A high percentage of test takers correctly identify this answer.
Answer choice (D): The language of the people does not mean the continents were connected. Australians and Americans share the same language, but this is because both areas were populated in modern times by English-speaking people from Britain.
2.B: It is true that certain characters and plot twists in my newly released film The Big Heist are strikingly similar to characters and plot twists in Thieves, a movie that came out last year.
P: Based on these similarities, the film studio that produced Thieves is now accusing me of taking ideas from that film. +All production work on The Big Heist was actually completed months before Thieves was released.+???
C:The accusation is clearly without merit.
(A) Before Thieves began production, its script had been circulating for several years among various film studios, including the studio that produced The Big Heist.
--weaken
(B) The characters and plot twists that are most similar in the two films have close parallels in many earlier films of the same genre.
--irrelevant--right--这个是指这个导演之前的同类电影吧？
(C) The film studio that produced Thieves seldom produces films in this genre.
--irrelevant
(D) The director of Thieves worked with the director of The Big Heist on several earlier projects.
--support--right
(E) The time it took to produce The Big Heist was considerably shorter than the time it took to produce Thieves.
--irrelevant
3.
B:Herbicides allow cereal crops to be grown very efficiently, with virtually no competition from weeds. In Britain, partridge populations have been steadily decreasing since herbicide use became widespread. Some environmentalists claim that these birds, which live in and around cereal crop fields, are being poisoned by the herbicides.
P: tests show no more than trace quantities of herbicides in partridges on herbicide-treated land.
C: something other than herbicide use must be responsible for the population decrease.
maybe the birds feed on weeds
(A) The elimination of certain weeds from cereal crop fields has reduced the population of the small insects that live on those weeds and that form a major part of partridge chicks' diet.
--right
(B) Since partridges are valued as game birds, records of their population are more carefully kept than those for many other birds.
--support
(C) Some of the weeds that are eliminated from cereal crop fields by herbicides are much smaller than the crop plants themselves and would have no negative effect on crop yield if they were allowed to grow.
--irrelevant
(D) Birds other than partridges that live in or around cereal crop fields have also been suffering population declines.
--irrelevant
(E) The toxins contained in herbicides typically used on cereal crops can be readily identified in the tissues of animals that have ingested them.
--irrelevant
4.A product that represents a clear technological advance over competing products can generally command a high price. Because technological advances tend to be quickly surpassed and companies want to make large profits while they still can, many companies charge the maximum possible price for such a product. But large profits on the new product will give competitors a strong incentive to quickly match the new product's capabilities. Consequently, the strategy to maximize overall profit from a new product is to charge less than the greatest possible price.
In the argument above, the two portions in boldface play which of the following roles?
(A) The first is a consideration that has been raised to argue that a certain strategy is counterproductive; the second presents that strategy.
(B) The first is a consideration raised to support the strategy that the argument recommends; the second presents that strategy.
(C) The first is a consideration raised to explain the appeal of a certain strategy; the second presents that strategy.
--right
(D) The first is an assumption, rejected by the argument, that has been used to justify a course of action; the second presents that course of action.
(E) The first is a consideration that has been used to justify pursuing a goal that the argument rejects; the second presents a course of action that has been adopted in pursuit of that goal.
5.
B: SV40 is a monkey virus
P:Although exposure to asbestos is the primary cause of mesothelioma, a slow-developing cancer, researchers believe that infection by the SV40 virus is a contributing cause, since in the United States 60 percent of tissue samples from mesotheliomas, but none from healthy tissue, contain SV40. in 1960 some polio vaccine was contaminated with the virus.
C:Researchers hypothesize that this vaccine was the source of the virus found in mesotheliomas decades later.
the patients are mostly over 40
(A) SV40 is widely used as a research tool in cancer laboratories.
--irrelevant, or weaken
(B) Changes in the technique of manufacturing the vaccine now prevent contamination with SV40.
--irrelevant
(C) Recently discovered samples of the vaccine dating from 1960 still show traces of the virus.
--irrelevant
(D) In a small percentage of cases of mesothelioma, there is no history of exposure to asbestos.
--slightly support
(E) In Finland, where the polio vaccine was never contaminated, samples from mesotheliomas do not contain SV40.
--support

fox0923 · 发表于 2011-12-13 23:23:44

怎么看不到选项

-- by 会员 LIAOYA (2011/12/13 17:28:55)

选项就用鼠标在下面drag一下就有了，选项是隐藏的白色字体。

风无衣 · 发表于 2011-12-14 11:35:51

【精炼2-4】
support_51s
premise:give a brief introduction of theory of continental drift
conclusion:South America was joined on its east coast with what is now the west coast of Africa.

(A) A large band of ancient rock of a rare type
along the east coast of South America is of
the same type as a band on the west coast of
Africa.——correct.fits the theory. this is the only answer that addresses the land
(B) Many people today living in Brazil are
genetically quite similar to many western
Africans.——maybe immigration
(C) The climates of western Africa and of the east
coast of South America resemble each other.——has no effect
(D) Some of the oldest tribes of people living in
eastern South America speak languages
linguistically similar to various languages
spoken by certain western African peoples.——has no effect
(E) Several species of plants found in western
Africa closely resemble plants growing in
South America.——has no effect

[逻辑小分队] 【每日逻辑练习第二季【2-4】

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