请教Prep逻辑 谢谢大家！！！

yanqing890427

24.    (29155-!-item-!-188;#058&003857)

Tiger beetles are such fast runners that they can capture virtually any nonflying insect.  However, when running toward an insect, the beetles intermittently stop, and then, a moment later, resume their attack.  erhaps they cannot maintain their pace and must pause for a moment's rest; but an alternative hypothesis is that while running tiger beetles are unable to process the resulting rapidly changing visual information, and so quickly go blind and stop.

Which of the following, if discovered in experiments using artificially moved prey insects, would support one of the two hypotheses and undermine the other?

(A) When a prey insect is moved directly toward a beetle that has been chasing it, the beetle immediately turns and runs away without its usual intermittent stopping.
(B) In pursuing a moving insect, the beetles usually respond immediately to changes in the insect's direction, and pause equally frequently whether the chase is up or down an incline.
(C) The beetles maintain a fixed time interval between pauses, although when an insect that had been stationary begins to flee, the beetle increases its speed after its next pause.
(D) If, when a beetle pauses, it has not gained on the insect it is pursuing, the beetle generally ends its pursuit.
(E) When an obstacle is suddenly introduced just in front of running beetles, the beetles sometimes stop immediately, but they never respond by running around the barrier.
答案是E 这道题 没有什么思路 谢谢大家帮帮我！！
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.
答案是B 为什么不选E？
32.    (31886-!-item-!-188;#058&005509)

State spokesperson:  Many businesspeople who have not been to our state believe that we have an inadequate road system.  Those people are mistaken, as is obvious from the fact that in each of the past six years, our state has spent more money per mile on road improvements than any other state.

Which of the following, if true, most seriously undermines the reasoning in the spokesperson's argument?

(A) In the spokesperson's state, spending on road improvements has been increasing more slowly over the past six years than it has in several other states.
(B) Adequacy of a state's road system is generally less important to a businessperson considering doing business there than is the availability of qualified employees.
(C) Over the past six years, numerous businesses have left the spokesperson's state, but about as many businesses have moved into the state.
(D) In general, the number of miles of road in a state's road system depends on both the area and the population of the state.
(E) Only states with seriously inadequate road systems need to spend large amounts of money on road improvements.
答案是E 为什么不选A？
34.    (31982-!-item-!-188;#058&005681)

For several years, per capita expenditure on prescription drugs in Voronia rose by fifteen percent or more annually.  In order to curb these dramatic increases, the ministry of health prohibited drug manufacturers from raising any of their products' prices.  Even though use of prescription drugs did not expand after this price freeze, per capita expenditure for prescription drugs continued to increase by a substantial percentage each year.

Which of the following, if true, most helps to explain why the ministry's action did not achieve its goal?

(A) After price increases were prohibited, drug manufacturers concentrated on producing new medications to replace existing products.
(B) The population of Voronia rose steadily throughout the period.
(C) Improvements in manufacturing processes enabled drug manufacturers to maintain high profit levels on drugs despite the price freeze.
(D) In addition to imposing a price freeze, the government encouraged doctors to prescribe generic versions of common drugs instead of the more expensive brand-name versions.
(E) After price increases were prohibited, some foreign manufacturers of expensive drugs ceased marketing them in Voronia.
为什么不选D？A哪里对呢？

demonlin

顶上来
同问 24 25题

edalee

34  B - "The population of Voronia rose steadily throughout the period."
--> Doesn't affect per capita expenditure

C - "Improvements in manufacturing processes enabled drug manufacturers to maintain high profit levels on drugs despite the price freeze."
--> price freeze doesn't lead to increase in per capita expenditure.

D - "In addition to imposing a price freeze, the government encouraged doctors to prescribe generic versions of common drugs instead of the more expensive brand-name versions."
--> policy will lead to reduced per capita expenditure

E - "After price increases were prohibited, some foreign manufacturers of expensive drugs ceased marketing them in Voronia."
--> policy will not increase per capita expenditure since the manufacturers will not be spending more money to promote the medications.

It leaves us with A:
"After price increases were prohibited, drug manufacturers concentrated on producing new medications to replace existing products.
--> by developing new patented drugs (which are usually more expensive -- assumption), and if the population finds the new drugs useful (another assumption), yes the per capita expenditure of medication will increase.

duanyintian

楼上最后一题的解释，绝对错。因为我们在做逻辑题目时不可能要像楼上那样有任何的ASSUMPTION.
真正的原因是，国家政府规定公司不能在公司的药物上加价，但是没有规定在新药物的价格啊。所以一旦新药物价格提高，那么它的人均消费量就自然而然的提高了。

sdcar2010

所以一旦新药物价格提高

This is an assumption, too.

winzero

我觉得楼主在相关性问题上可能理解得不怎么好。25题和32题其实选正确答案的关键就是相关性。
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.
argument：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. 这里说的是为了令到出口再出现增幅，政府应该让PUNDRA WEAK again。 而E说的是工厂效率的提高能够使产品更便宜，即使货币不贬值。 E说的是一种情况，不是讨论题目中要求的是否应该让PUNDRA WEAK again。
而32题

(A) In the spokesperson's state, spending on road improvements has been increasing more slowly over the past six years than it has in several other states.
增长变慢。相对于其他州。
our state has spent more money per mile on road improvements than any other state. 尽管增长变慢。但是该州还是花最多的钱在公路修筑上啊。。 。没有weaken argument。
E就可以了。 只有那些道路建设不足的州才需要更多投资进道路建设。直接就WEAKEN了。
本人一点愚见。 楼主可以多做题，多感悟相关性

gesteven

有意思的一题

政府规定药品不能提价，但是没有规定新药不能定高价

奶牛316

确实做出新药定个高价是可以达到题目要求的效果的，关键是这题其余选项都明显不能达到使per capita继续上升。
还有楼上的签名真牛逼！

醒醒Shine

the ministry of health prohibited drug manufacturers from raising any of their products' prices

政府都说了是any of their products' price，难道新药就不是这些公司的product了吗？这个gap实在太大

shjtSAIF

关于药的那一题我做的时候也有新药是不是也在政府限价的范围内的疑虑，但相对而言A是较佳的答案