【每日逻辑练习第三季】【1-7】

torisea

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 off 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.


Accordingto the Tristate Transportation Authority, making certain improvements to themain commuter rail line would increase ridership dramatically.  The authority plans to finance theseimprovements over the course of five years by raising automobile tolls on thetwo highway bridges along the route the rail line serves.  Although the proposed improvements are indeedneeded, the authority's plan for securing the necessary funds should berejected because it would unfairly force drivers to absorb the entire cost ofsomething from which they receive no benefit.


Whichof the following, if true, would cast the most doubt on the effectiveness ofthe authority's plan to finance the proposed improvements by increasing bridgetolls?

(A)Before the authority increases tolls on any of the area bridges, it is requiredby law to hold public hearings at which objections to the proposed increase canbe raised.
(B)Whenever bridge tolls are increased, the authority must pay a privatecontractor to adjust the automated toll-collecting machines.
(C)Between the time a proposed toll increase is announced and the time theincrease is actually put into effect, many commuters buy more tokens than usualto postpone the effects of the increase.
(D)When tolls were last increased on the two bridges in question, almost 20percent of the regular commuter traffic switched to a slightly longeralternative route that has since been improved.
(E)The chairman of the authority is a member of the Tristate Automobile Club thathas registered strong opposition to the proposed toll increase.


Cropscan be traded on the futures market before they are harvested.  If a poor corn harvest is predicted, pricesof corn futures rise; if a bountiful corn harvest is predicted, prices of cornfutures fall.  This morningmeteorologists are predicting much-needed rain for the corn-growing regionstarting tomorrow.  Therefore, sinceadequate moisture is essential for the current crop's survival, prices of cornfutures will fall sharply today.

Which of the following, if true, most weakens theargument above?

(A)Corn that does not receive adequate moisture during its critical pollinationstage will not produce a bountiful harvest.
(B)Futures prices for corn have been fluctuating more dramatically this seasonthan last season.
(C)The rain that meteorologists predicted for tomorrow is expected to extend wellbeyond the corn-growing region.
(D)Agriculture experts announced today that a disease that has devastated some ofthe corn crop will spread widely before the end of the growing season.
(E)Most people who trade in corn futures rarely take physical possession of thecorn they trade.




CompaniesO and P each have the same number of employees who work the same number ofhours per week.  According to recordsmaintained by each company, the employees of Company O had fewer job-relatedaccidents last year than did the employees of Company P.  Therefore, employees of Company O are lesslikely to have job-related accidents than are employees of Company P.

Which of the following, if true, would most weaken theconclusion?

(A)The employees of Company P lost more time at work due to job-related accidentsthan did the employees of Company O.
(B)Company P considered more types of accidents to be job-related than did CompanyO.
(C)The employees of Company P were sick more often than were the employees ofCompany O.
(D)Several employees of Company O each had more than one job-related accident.
(E)The majority of job-related accidents at Company O involved a single machine.

Adrug that is highly effective in treating many types of infection can, atpresent, be obtained only from the bark of the ibora, a tree that is quite rarein the wild.  It takes the bark of 5,000trees to make one kilogram of the drug. It follows, therefore, that continued production of the drug mustinevitably lead to the ibora's extinction.

Whichof the following, if true, most seriously weakens the argument above?

(A)The drug made from ibora bark is dispensed to doctors from a central authority.
(B)The drug made from ibora bark is expensive to produce.
(C)The leaves of the ibora are used in a number of medical products.
(D)The ibora can be propagated from cuttings and grown under cultivation.
(E)The ibora generally grows in largely inaccessible places.

torisea

Question #2. October 2002 LSAT, Section #2, #15. bible解释白色隐藏在下方
The correct answer choice is (D)
The argument uses the premise that Baja turtles and Japanese turtles share ninety-five percent of their
DNA to conclude that Baja turtles hatch in Japanese waters 10,000 kilometers away. This sounds like
convincing statistical evidence unless you realize that many organisms share DNA. For example, humans
and chimpanzees share about 98% of their DNA (we share about 75% of our DNA with dogs, for that
matter). Since Baja and Japanese turtles come from the same species, it is not surprising that they would
share a high percentage of their DNA. Regardless of whether or not you saw this connection, you should
have been skeptical of the reference to juvenile turtles travelling 10,000 kilometers. Such a lengthy trip by
a juvenile animal is unlikely, and calls into question the soundness of the argument.
Answer choice (A): This answer does not impact the argument because no details—DNA or otherwise—
are given about the turtles at these nesting sites off the Pacific coast of North America.
Answer choice (B): The fact that Atlantic turtles have nesting and feeding sites no more than 5,000
kilometers apart does not attack the argument because the argument is about Baja turtles.
Answer choice (C): This answer attempts to weaken the argument by inducing you to conclude that if the
Japanese hatchlings are declining but Baja sites are constant, then the Baja sites cannot be supplied by the
Japanese hatchlings. But, the answer choice moves from the number of hatchlings to the number of sites.
Even with a declining number of hatchlings, the number of sites could remain constant, albeit with fewer
turtles at each. Because of this possibility, the answer does not undermine the argument.
Answer choice (D): This is the correct answer. The answer shows that all turtles in the argument have the
same ninety-five percent DNA, meaning that the Baja turtles did not have to take the 10,000 kilometer trip.
Answer choice (E): The breeding between species was not an issue in the stimulus.

corneliaflower

啊  已经有人发了  我还说今天要不要值最后一班呢~

和小分队走过第二季真的很开心
希望大家都能按时交作业 少让daisy操心 哈哈

最后祝大家都能携7归

daisyの小夢想

啊  已经有人发了  我还说今天要不要值最后一班呢~

和小分队走过第二季真的很开心
希望大家都能按时交作业 少让daisy操心 哈哈

最后祝大家都能携7归

-- by 会员 corneliaflower (2012/2/28 19:38:10)

撒花谢谢 可爱的花儿荣升荣誉更新成员哈哈哈~~

子弹青春

高七七

1.
B: LT—distinct groups—some Pacific, some Atlantic
P: juvenile Pacific L—feed near Baja, hatch in Japan 1000 away.
C: weaken
Choose: D

2.
B: according to TTA, making main commuter rail line would increase ridership
P: plan by raising automobile tools on 2 highway bridges
C:  securing funds should be reject—force drivers to absorb cost which they no benefit.
Choose D

3.
B: Crops can be trade before harvested.
P: poor corn harvest predicted--$ increased; bountiful crop predicted--$ fall
 Rain
C: rain—adequate--$ fall
Choose: A

4.
B: O& employee work same hour/week
P: O had few job accidents than P(record maintained)
C: O are less likely to have job accident than P
Choose  B  

5.
B: a drug--(from bark of ibora-rare) --highly effect many infection can
P: take the bark of 5000 trees—make 1kg drug
C: Drug lead ibora's extinction
Choose: D

cherry1102

2.Premise: TTA说提高rail line可以增加乘坐的人数。TTA通过提高两个地方的过路费finance这个计划
Conclusion：此funds计划不可实施因为司机承担了所有的cost
思路：增加过路费对司机没影响，去走别的路了     D

3.Premise：谷物可在丰收之前就开始卖。预计产量小，价钱就高。预计产量大，价钱就低。
Conclusion：气象学家说明天有谷物需要的雨，所以明天谷物价钱低
思路：不知道现在谷物的状态是否需要水捏。。     A


4.Premise：P和O有相等的人数和工作小时。O比P的accident少
Conclusion：O的员工比P的员工发生accident几率小
思路：排除法做的。。    B


5.Premise：一种治疗传染的药需要I的树皮，5000棵树做1kg
Conclusion：用树做药导致树的灭亡
思路：剪枝神马的有利树的生长     D

livdl

31s
B l turtle live and breed in pacific or atlantic region
P because 95 % dna samples taken from Japanese was B turtle
C l turtle hatch in Japanese water
思路 样本的不确定性无代表性 可能某段时期在J 海的B 特别多 不代表一直很多
B
此题没读懂啊刚开始
原来讲的是L 这种乌龟在不同的地方进食和生活

56s
B making improvements would make increase in ridership
P the authority plans to add tolls to make more money for the improvement
C this plan is not effective because it’s unfair to drivers
A

48s
B 预测会丰收 价格下降 预测会减产 价格上升
P 预测明天雨会很多
C 雨多导致丰收 今天价格会下降
如果雨水过多导致减产呢？
或者今天价格与明天的价格有什么关系呢？
D

48s
B 两个公司每周员工工作时间一样 员工人数一样
P O 公司的员工去年比P 公司的员工犯错误的数量少
C o 公司的员工比p 更不可能犯错误

去年的数据不代表整体 如果o 公司犯错误的总是那么几个人呢？
D


23s
B 一种物质可以做药 但是只能从树上取
P 因为每棵树能提取的量很小
C 继续生产这种药会造成此种树的灭绝
如果将这种树引入人工培养呢
D

xunjiejie5

1
背景：一种乌龟很有特点，在太平洋和大西洋。
前提：新的证据显示在半岛的乌龟在距离日本1000的海里产卵
结论：95%的样本是来自日本的。
预测：别的因素导致95%的样本来自日本的结论不成立。

2.
背景：TTA将要修建主要通道
前提：为了修建主要通道，收费上将会提高。
结论：不会成功，因为没有好处
预测：能成功，因为将会减少成本
A 无关 B 无关C 无关D正确E无关

3.
背景：能预测玉米的收成
前提：如果玉米的收成好的，价格下降；玉米收成不好，价格上升
结论：预测有雨是玉米很需要的，因此能够收成很好，所以玉米价格下降
预测：别的原因导致玉米收成不好，价格上升。
A 只说了一个原因，没有说结果
B 无关 C无关 Ｄ　Ｅ无关

4.
背景：O和P有相同的员工数，相同的工作时间
前提：O的工伤少于P的工伤
结论：O的员工不太可能有工伤。
预测：因为别的什么原因，使O员工的工伤较少
A 加强 B加强 C无关 D 无关 E

5
背景：一种药对各种传染都很有效，但是只能从一种树上来。
前提：5000棵树---造药
结论：树灭绝
预测：出现了别情况和方法，树没有灭绝
A 无关  B 无关 C leaves 这里讨论的是树  D   Ｅ无关

蛋疼的小鸟