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[逻辑小分队] 【每日逻辑练习第二季】【1-2】

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161#
发表于 2015-8-7 16:07:58 | 只看该作者
50’’
B: plastic rings threat animals
P: the plastic ring should make a change
C: the problem would be resolved
推理: the redesigned plastic ring still harm to animal
E: correct 应该选B
A: irrelative
B: i am not sure about this option, it is about the time? although the problem would not be solved immediately, it can be solved after several days???
C: irrelative
D: irrelative

41’’
B: tiger sharks attacked tourists, so it hurts T’s tourism industry
P: kill all tiger shark
C: it can rebuild tourism industry
推理:kill all tiger sharks would make a negative impact on tourism industry => people come to T city for seeing tiger shark?
A: correct??? i am not sure about that 正解:D
B: not relative
C: there are no obvious relationship between beaches and tiger shark
D: irrelative
E: not all means someone enjoy swimming, so this program still would have some effects. so it is strengthen


38’’
B: Ertland never import apple, because local people prefer local-grown apple
P: Koso cut down price to sell apple at Ertland
C: the plan will succeed
推理:people in Ertland do not care the price? the price of Ertland apple is very low?
E: correct => the apple price in E could lower than K’s apple price
A: strengthen
B: irrelative
C: irrelative
D: it can strengthen, because low quantity means high prices

62’’
P: a train station would move the entrance to another low-rent entrance, and the current one would rent to others
C: this plan can save money for the train Co.
推理:the answer could represent a fact to support the plan OR it can eliminate the weaken of the link
C: correct 又错了。。。应该选B
A: weaken
B: weaken
D: weaken
E: irrelative

25’’
P: PZ1000 has the fewest injuries rate in its class
C: PZ1000 has the fewest injuries rate among all cars
推断:PZ1000’s class =/ all cars, may be PZ1000’s class is one of the most dangerous car class?
C: correct, but i have a question that “more likening to be involved in accident” can represent the injuries rate is higher per accident? I think it is a little awkward, but anyway, it is the best option
A: slightly strengthen
B: irrelative
D: irrelative
E: irrelative

阅读有问题,选项理解有偏差,导致做错了
162#
发表于 2015-8-8 13:00:30 | 只看该作者
mark 一下第一题。还是对结论的中心点把握不清。
163#
发表于 2015-8-11 21:17:59 | 只看该作者
1. 35s
2. premise: old The plastic rings
pose a threat to wild animals, which often
become entangled in the discarded rings and
suffocate as a result.
all
beverage companies will soon use only those
rings consisting of a new plastic that
disintegrates after only three days’ exposure to
sunlight.
conclusion:Once we all complete the switchover
from the old to the new plastic rings, therefore,
the threat of suffocation that plastic rings pose
to wild animals will be eliminated.
3. the old rings still exist.
4. A. The conclusion is conditional:Once we all complete the switchover
from the old to the new plastic rings.
B. correct
C. irrelevant
D. plastic rings during shipping will not cause trash.
E. The conclusion focuses on suffocation.


1. 28s
2. Premises: Tiger sharks attack tourists.
   Tourism industry is the second in annual revenues.
Conclusion: In order to help the economy, therefore, the mayor of the island has proposed an ongoing program to kill any tiger sharks within a mile of the beaches.
3. killing sharks may also harm the first fishing industry.
4. A. doesn't affect the consequence
B. strengthen
C. strengthen
D. correct
E. irrelevant


1. 22s
2. The country of Ertland has never imported apples because consumers there generally prefer the unique texture of Ertland-grown apples.
by selling Kosolia-grown apples at half the price of local apples and promoting them as a nourishing, low-cost alternative.
conclusion: apple growers from Kosolia will promote their apples
3. people in Ertland care more about the unique texture than about costs.
4. A. strengthen, which makes Ertland apples not that special
B. irrelevant
C. Irrelevant
D. strengthen
E. correct



1. 28s
2. premise: moving the station's entrance from its current valuable Main Street location to a low-rent adjoining side street and then leasing the high-rent entrance space to retail businesses.
conclusion: the train company could easily pay for those and all other proposed renovations without negative impact on its tight budget.
3. removing from main street location will not affect number of people visiting the station or its profits.
4. A. weaken
B. correct
C. irrelevant
D. weaken
E. irrelevant


1.17s
2. premises: PZ 1000 has the fewest injuries per accident of any car in its class
conclusion: the PZ 1000 is one of the safest cars available today.
3. That whole class is risky
4. A. strengthen
B. irrelevant
C. correct
D. strengthen
E. irrelevant


164#
发表于 2015-8-27 11:04:55 | 只看该作者
1-2-1-weaken
1)计时:1.07速度是硬伤啊%>_<%
2)逻辑链:
-B
wild animals entangled in the discarded rings and suffocate
-P1
all companies will use the new rings
-P2
the new rings can disintegrate after three days' exposure to sunlight
-Conclusion
use the new plastic rings can eliminate the threat
3)推测Prephrase
原来的plastic rings一直存在,并没有消失;动物在这3天里就窒息死了;几乎不出太阳的地方,就不会降解;
4)选项分析:
A irrelevant,argument的时间前提是once we all complete the switchover
B bingo!
C irrelevant
D irrelevant,讨论的是丢掉之后,不是运输途中
E out of the scope,吃掉分解物致死是另一件事了
选B

1-2-2-weaken
1)计时:41.71
2)逻辑链:
-Backgrounds
sharks sometimes attack tourists.this hurt the second industry in this country
-Conclusion
in order to help the economy,propose an ongoing program to kill all tiger sharks within a mile of the beach
3)推测Prephrase
have negative effective on economy
4)选项分析:
A support
B irrelevant
C irrelevant
D right,虎鲨↓小鲨↑鱼↓不利于渔业,harm economy
E 只要有swimming和surfing的tourist are attacked buy ts,就会影响tourism,从而影响economy,所以irrelevant
选E 做错了
应该选D

1-2-3-weaken
1)计时:39.36
2)逻辑链:
-Backgrounds
local consumers prefer E-grown apples
-Plan
sell K-grown apples at half the price of local apples and promote K
3)推测Prephrase
质量不好,不fresh,consumer preference
4)选项分析:
A support
B irrelevant
C irrelevant
D support
E bingo!E-grown apples can reduce price too.
选E

1-2-4-strengthen
1)计时:38.45
2)逻辑链:
-B
main street location is valuable,side street is low-rent
-Plan
move the entrance from MS to SS and lease the entrance space to retail business
-Conclusion
easily pay for other proposes without tight budget
3)推测Prephrase
MS很热闹,租金高;SS租金低,成本低;strain station的needs是刚性的
4)选项分析:
A undermine,在M工作的人多于在S工作的,所以move entrance会减少take train的人数
B Bingo!无论entrance在哪里,take train的人数都不会减少
C irrelevant
D undermine
E irrelevant,时间不对
选B

1-2-5-weaken
1)计时:20.79
2)逻辑链:
-Premise
PZ 1000 has the fewest injuries per accident of any car in its class
-Conclusion
PZ 1000 is one of the safest cars available today
3)Prephrase
只局限于一个class里最低,还有很多其他的classes
4)选项分析:
A support
B 应该是support,卖得更多,平均事故率就会被拉低
C correct,PZ1000虽然在它的class里面最低,但是这个class总体的accident rate很高,就不能说明它是safest
D support
E irrelevant,本来con也限定了today
选B 错了
应该选C!!!
165#
发表于 2015-8-27 11:32:34 | 只看该作者
1. Beverage company representative: The plastic rings that hold six-packs of beverage cans together pose a threat to wild animals, which often become entangled in the discarded rings and suffocate as a result. Following our lead, all beverage companies will soon use only those rings consisting of a new plastic that disintegrates after only three days’ exposure to sunlight. Once we all complete the switchover from the old to the new plastic rings, therefore, the threat of suffocation that plastic rings pose to wild animals will be eliminated.
Which one of the following, if true, most seriously weakens the representative’s argument?  
--BIBLE WEAKEN NO.2
计时:33.76s
逻辑链:公司将旧的plastic ring换成新的可在三天内降解的PR就可以消除对PR对野生动物带来的(使野生动物可能因PR而窒息)
推测:三天之内也可能有动物因此窒息而死;只是饮料公司换了不能完全消除影响
(A) The switchover to the new plastic rings will
take at least two more years to complete. 无关 转换需要花两天和最终能不能消除威胁无关
(B) After the beverage companies have switched
over to the new plastic rings, a substantial
number of the old plastic rings will persist
in most aquatic and woodland environments.
(C) The new plastic rings are slightly less
expensive than the old rings.        无关 价格和效果无关
(D) The new plastic rings rarely disintegrate
during shipping of beverage six-packs
because most trucks that transport canned
beverages protect their cargo from sunlight. 无关,运输过程中能否降解和丢掉后能否降解无关
(E) The new plastic rings disintegrate into
substances that are harmful to aquatic
animals when ingested in substantial
quantities by them.  无关 文章讲的是消除窒息的影响


2.
Tiger sharks are common in the waters surrounding Tenare Island.  Usually tiger sharks feed on smaller sharks, but sometimes they have attacked tourists swimming and surfing at Tenare's beaches.  This has hurt Tenare's tourism industry, which is second only to its fishing industry in annual revenues.  In order to help the economy, therefore, the mayor of the island has proposed an ongoing program to kill any tiger sharks within a mile of the beaches.
Which of the following, if true, most strongly calls into question the likelihood that implementation of the mayor's proposal will have the desired consequence?
-- PREP07 CR1 NO.5
逻辑链:市长提出通过捕杀虎鲨来刺激帮助发展经济,因为这样可以保护旅游业
推测:保护了旅游业可能会伤害捕鱼业,从而伤害经济
(A) Even if not all the tiger sharks that come close to the beaches are killed, the existence of the program would reassure tourists. 加强 说明program好
(B) Business owners who depend on tourism are willing to pay most of the cost of implementing the program. 加强 还是赞成program
(C) Tourists come to Tenare Island for its beaches, even though the island features a number of other tourist attractions. 加强 游客常来这个海滩那么保护了游客就可以多很多收益
(D) The small sharks on which tiger sharks prey feed on fish that are commercially important to the island's fisheries. 正确 影响了捕鱼业即使旅游业好了经济还是会受到影响
(E) Not all tourists who come to Tenare Island enjoy swimming or surfing. 略削弱 但是不直接


3.
The country of Ertland has never imported apples in any significant quantity because consumers there generally prefer the unique texture of Ertland-grown apples.  Nevertheless, apple growers from Kosolia, a neighboring country, plan to sell their apples in Ertland by selling Kosolia-grown apples at half the price of local apples and promoting them as a nourishing, low-cost alternative.
Which of the following, if true, casts most doubt on the viability of the plan by Kosolia's apple growers to sell their apples in Ertland?
-- PREP07 CR1 NO.6
逻辑链:E这个地方的人喜欢吃自己本地的苹果所以很少大量从外地进苹果,但是K这个地方的人打算半价向E地方的人销售他们的苹果并且宣传他们的苹果富有营养。
推测:E卖苹果的人也减价了
(A) Most of the varieties of apples grown in Ertland were originally derived from common Kosolian varieties. 加强 说明两个地方的苹果差不多 K的还便宜当然会成功
(B) Consumers in Ertland tend to spend about the same proportion of their income on fresh fruits and vegetables as do consumers in Kosolia. 无关 花多少钱在蔬菜水果上不影响K的机会
(C) At times in the past, Ertland has exported significant quantities of apples to Kosolia. 无关 过去E向K出口和如今K向E出口无关
(D) Some varieties of apples grown in Kosolia can be harvested throughout most of the year, whereas the varieties grown in Ertland can be harvested only during two months of the year. 加强 K的苹果一年四季都有
(E) Profiles of Ertland-grown apples are high enough in Ertland that growers, wholesalers, and retailers there could easily afford to reduce the price at which these apples are sold. 正确


4.
As part of major renovations to Flowertown's Main Street train station, consultants to the train company proposed moving the station's entrance from its current valuable Main Street location to a low-rent adjoining side street and then leasing the high-rent entrance space to retail businesses.  In that way, the train company could easily pay for those and all other proposed renovations without negative impact on its tight budget.
Which of the following, if true, would most strongly support the consultants' proposal?
-- PREP07 CR1 NO.7
逻辑链:火车公司把他们的进站口移到一个较偏僻的便宜的地方然后把原来的地方租给商家就可以进行其他的革新而不用担心预算的问题
推测:换入口不会影响到火车站原来的业务收益
(A) More train commuters are employed in businesses located on Main Street than in businesses located on the adjoining side street. 削弱 影响到了本来的收益
(B) A reliable survey of Flowertown's commuters showed that virtually none of them would use the train any less frequently if the station's entrance were moved. 加强 不影响本来的收益
(C) The high-rent block of Flowertown's Main Street includes several buildings whose owners currently seek to replace long-standing tenants lost in recent months. 无关 讲的是其他的商家
(D) If the station's entrance were moved, the train company would need to begin costly renovations to its Main Street entrance space. 削弱 换入口还要增加一大笔开销
(E) Ridership on Flowertown trains declined only slightly from 1970 to 1985 while other train companies lost large numbers of commuters. 无关 没有提到换入口带来的影响


5.
Automobile Dealer's Advertisement:
The Highway Traffic Safety Institute reports that the PZ 1000 has the fewest injuries per accident of any car in its class.  This shows that the PZ 1000 is one of the safest cars available today.
Which of the following, if true, most seriously weakens the argument in the advertisement?
-- PREP07 CR1 NO.8
逻辑链:广告商说PZ在每次事故中的受伤人数比同等级的都少,所以他是如今最安全的车
推测:class本身的受伤率就是最高的
(A) The Highway Traffic Safety Institute report listed many cars in other classes that had more injuries per accident than did the PZ 1000. 加强
(B) In recent years many more PZ 1000s have been sold than have any other kind of car in its class. 无关 卖掉的多不多和是不是最安全的无关 可能是因为其他原因才买的
(C) Cars in the class to which the PZ 1000 belongs are more likely to be involved in accidents than are other types of cars. 正确
(D) The difference between the number of injuries per accident for the PZ 1000 and that for other cars in its class is quite pronounced. 加强
(E) The Highway Traffic Safety Institute issues reports only once a year. 无关 出报告的频率和是不是最安全的无关
166#
发表于 2015-8-27 15:13:08 | 只看该作者
#1 39
P:use rings consisting of new plastics that disintegrates after 3 days
C:threat of suffocation will be eliminated
Key words: SUFFOCATION eliminate; new and old rings.
Prephrase: what if animals entangle within 3 days? (additional: disadvantages in the new rings or in the previous ones.)

A: the price adjustment won’t make any difference on the new rings’ effectiveness
B: right answer. To weaken the argument, information must be given on why this switchover wont eliminate the suffocation. The negative effects caused by the previous rings can be a reason.
C: irrelevant, same with A
D: irrelevant, this answer doesn’t affect the conclusion since it doesn't address the threat of suffocation to animals.
E: an attractive choice. Pay attention to the additional condition, this message is not solid enough to undermine the author’s argument. (OVERLOOK THE SHELL GAME)

E from Bible:

The conclusion is specifically about suffocation, and E does not address suffocation. Instead, E is a shell game that attacks a conclusion that is similar but different than the actual conclusion. Remember, one of the rules for weakening arguments is to focus on the conclusion, and knowing the details of the conclusion is part of that focus.

#2 29s
P: Kill any tiger sharks within a mile of the beaches
C: the proposal will protect its economy
Prephrase: any other possibilities? Eg: kill sharks will harm the ecosystem?
Key words: protect economy; kill tiger sharks.
Choice: D

#3 30s
P: K tends to sell their apple at lower price
C: win E’s market share
Prephrase: E’s uniqueness or K’s disadvantages.
Key words: K won’t win market share in E
Choice: E

#4 30s
P: move the station to another street and save the costs for renovation
C: the plan wont have any negative impact on its tight budget
Prapharse: the validity of the plan (the change wont lead to ridership reduction)
Choice: B

#5 20s
P: PZ 1000has fewest injuries rate in its class
C: PZ’s one of the safest cars available today
Prephrase: how about the comparison between PZ’s class and other classes?
Choice: C
167#
发表于 2015-11-17 00:31:58 | 只看该作者
精练题:
Explain:
C: the threat will be eliminated
P1(hidden): we all complete the switchover from the old to the new plastic rings
P2: all beverage companies use only those rings consisting of a new plastic
Background: The plastic rings that hold six-packs of beverage cans together pose a threat to wild animals
Weaken: 1. Some company will not use the ring consisting of new plastic;
2. The beverage company cannot complete the switchover.
3. The reaction product of disintegrate from new plastic will threat the animals.
这个做错了,选成了E,结论没有找全,放大了范围。
168#
发表于 2015-11-17 14:49:50 | 只看该作者
精练题:
Explain:
C: the threat will be eliminated结论不对,结论里面有修饰成分是不可以省略的,它表示范围,对选项至关重要
P1(hidden): we all complete the switchover from the old to the new plastic rings
P2: all beverage companies use only those rings consisting of a new plastic
Background: The plastic rings that hold six-packs of beverage cans together pose a threat to wild animals
Weaken: 1. Some company will not use the ring consisting of new plastic;
2. The beverage company cannot complete the switchover.
3. The reaction product of disintegrate from new plastic will threat the animals.
逻辑链:
2. Tiger sharks are common in the waters surrounding Tenare Island.(background)  Usually tiger sharks feed on smaller sharks, but sometimes they have attacked tourists swimming and surfing at Tenare's beaches.  This has hurt Tenare's tourism industry, which is second only to its fishing industry in annual revenues.(premise)  In order to help the economy,(hidden premise) therefore, the mayor of the island has proposed an ongoing program to kill any tiger sharks within a mile of the beaches.(conclusion)
Weaken: Tiger sharks are part of the food chain of fish industry; People come to see the tiger sharks; The number of people attacked by tiger sharks are not decreased after killing tiger sharks within a mile of the beaches.
3 The country of Ertland has never imported apples in any significant quantity because consumers there generally prefer the unique texture of Ertland-grown apples.(concession) Nevertheless, apple growers from Kosolia, a neighboring country, plan to sell their apples in Ertland(main conclusion) by selling Kosolia-grown apples at half the price of local apples and promoting them as a nourishing, low-cost alternative.(premise)
Weaken: People in Ertland buy apples considering texture more than price or nutrients; Ertland-grown apples sellers will decrease their prices, too; Nutrients cannot be distinguished through appearance.
4. As part of major renovations to Flowertown's Main Street train station, consultants to the train company proposed moving the station's entrance from its current valuable Main Street location to a low-rent adjoining side street and then leasing the high-rent entrance space to retail businesses.(premise)  In that way, the train company could easily pay for those and all other proposed renovations without negative impact on its tight budget.(main conclusion)
Support: the cost of moving station’s entrance will not have negative impact on tight budget.  Retail businesses are willing to lease the high-rent entrance.
5.Automobile Dealer's Advertisement:
The Highway Traffic Safety Institute reports that the PZ 1000 has the fewest injuries per accident of any car in its class. (premise)This shows that the PZ 1000 is one of the safest cars available today.(conclusion)
Weaken: safest=\=fewest injuries; Other cars besides PZ1000 do not cause injuries.

169#
发表于 2016-2-1 22:35:17 | 只看该作者
0.0是说每天的联系只有第一道题有解释么。
170#
发表于 2016-2-15 11:52:26 | 只看该作者
1. Beverage company representative: The plastic rings
that hold six-packs of beverage cans together
pose a threat to wild animals, which often
become entangled in the discarded rings and
suffocate as a result. Following our lead, all
beverage companies will soon use only those
rings consisting of a new plastic that
disintegrates after only three days’ exposure to
sunlight. Once we all complete the switchover
from the old to the new plastic rings, therefore,
the threat of suffocation that plastic rings pose
to wild animals will be eliminated.
Which one of the following, if true, most seriously
weakens the representative’s argument?  
--BIBLE WEAKEN NO.2


weaken
(A) The switchover to the new plastic rings will
take at least two more years to complete.
still can be done
(B) After the beverage companies have switched
over to the new plastic rings, a substantial
number of the old plastic rings will persist
in most aquatic and woodland environments.
suffocation仍热没被解决
(C) The new plastic rings are slightly less
expensive than the old rings.
strengthen the argument
(D) The new plastic rings rarely disintegrate
during shipping of beverage six-packs
because most trucks that transport canned
beverages protect their cargo from sunlight.
strengthen
(E) The new plastic rings disintegrate into
substances that are harmful to aquatic
animals when ingested in substantial
quantities by them.
right

EXPLANATION: However, the conclusion is
specifically about suffocation, and answer choice (E) does not address suffocation. Instead, answer choice (E) is a shell game that attacks a conclusion that is similar but different than the actual conclusion.
BG The plastic rings
that hold six-packs of beverage cans together
pose a threat to wild animals, which often
become entangled in the discarded rings and
suffocate as a result.
premise:Following our lead, all
beverage companies will soon use only those
rings consisting of a new plastic that
disintegrates after only three days’ exposure to
sunlight.
Once we all complete the switchover
from the old to the new plastic rings,

conclusion:the threat of suffocation that plastic rings pose
to wild animals will be eliminated.




2.


Tiger sharks are common in the waters surrounding Tenare Island.  Usually tiger sharks feed on smaller sharks, but sometimes they have attacked tourists swimming and surfing at Tenare's beaches.  This has hurt Tenare's tourism industry, which is second only to its fishing industry in annual revenues.  In order to help the economy, therefore, the mayor of the island has proposed an ongoing program to kill any tiger sharks within a mile of the beaches.


Which of the following, if true, most strongly calls into question the likelihood that implementation of the mayor's proposal will have the desired consequence?
-- PREP07 CR1 NO.5

(A) Even if not all the tiger sharks that come close to the beaches are killed, the existence of the program would reassure tourists.
(B) Business owners who depend on tourism are willing to pay most of the cost of implementing the program.
strengthen

(C) Tourists come to Tenare Island for its beaches, even though the island features a number of other tourist attractions.

(D) The small sharks on which tiger sharks prey feed on fish that are commercially important to the island's fisheries.

Tiger shark↓→small shark↑→fish↓→hurt the economy

(E) Not all tourists who come to Tenare Island enjoy swimming or surfing.
right  irrelevant



BG:
Tiger sharks are common in the waters surrounding Tenare Island.  Usually tiger sharks feed on smaller sharks, but sometimes they have attacked tourists swimming and surfing at Tenare's beaches.  This has hurt Tenare's tourism industry, which is second only to its fishing industry in annual revenues

C : the mayor of the island has proposed an ongoing program to kill any tiger sharks within a mile of the beaches.

PREMISE:  In order to help the economy
3.


The country of Ertland has never imported apples in any significant quantity because consumers there generally prefer the unique texture of Ertland-grown apples.  Nevertheless, apple growers from Kosolia, a neighboring country, plan to sell their apples in Ertland by selling Kosolia-grown apples at half the price of local apples and promoting them as a nourishing, low-cost alternative.


Which of the following, if true, casts most doubt on the viability of the plan by Kosolia's apple growers to sell their apples in Ertland?
-- PREP07 CR1 NO.6

(A) Most of the varieties of apples grown in Ertland were originally derived from common Kosolian varieties.
(B) Consumers in Ertland tend to spend about the same proportion of their income on fresh fruits and vegetables as do consumers in Kosolia.
(C) At times in the past, Ertland has exported significant quantities of apples to Kosolia.
(D) Some varieties of apples grown in Kosolia can be harvested throughout most of the year, whereas the varieties grown in Ertland can be harvested only during two months of the year.
(E) Profiles of Ertland-grown apples are high enough in Ertland that growers, wholesalers, and retailers there could easily afford to reduce the price at which these apples are sold.
E

4.


As part of major renovations to Flowertown's Main Street train station, consultants to the train company proposed moving the station's entrance from its current valuable Main Street location to a low-rent adjoining side street and then leasing the high-rent entrance space to retail businesses.  In that way, the train company could easily pay for those and all other proposed renovations without negative impact on its tight budget.

premise moving the station's entrance from its current valuable Main Street location to a low-rent adjoining side street and then leasing the high-rent entrance space to retail businesses.

conclusion the train company could easily pay for those and all other proposed renovations without negative impact on its tight budget.

Which of the following, if true, would most strongly support the consultants' proposal?
-- PREP07 CR1 NO.7

More train commuters are employed in businesses located on Main Street than in businesses located on the adjoining side street.  weaken
(B) A reliable survey of Flowertown's commuters showed that virtually none of them would use the train any less frequently if the station's entrance were moved.
right

(C) The high-rent block of Flowertown's Main Street includes several buildings whose owners currently seek to replace long-standing tenants lost in recent months.

(D) If the station's entrance were moved, the train company would need to begin costly renovations to its Main Street entrance space.
(E) Ridership on Flowertown trains declined only slightly from 1970 to 1985 while other train companies lost large numbers of commuters.


5.


Automobile Dealer's Advertisement:


The Highway Traffic Safety Institute reports that the PZ 1000 has the fewest injuries per accident of any car in its class.  This shows that the PZ 1000 is one of the safest cars available today.


Which of the following, if true, most seriously weakens the argument in the advertisement?


-- PREP07 CR1 NO.8

(A) The Highway Traffic Safety Institute report listed many cars in other classes that had more injuries per accident than did the PZ 1000.
(B) In recent years many more PZ 1000s have been sold than have any other kind of car in its class. strengthen
(C) Cars in the class to which the PZ 1000 belongs are more likely to be involved in accidents than are other types of cars.
right  weaken了结论 pz不一定是最saftey的car
(D) The difference between the number of injuries per accident for the PZ 1000 and that for other cars in its class is quite pronounced.
(E) The Highway Traffic Safety Institute issues reports only once a year.
right  错误!reports的真实性?
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