[求助]真奇怪？LSAT-12-2-23，LSAT-12-2-24

ztlbox

注意到一个奇怪的现象，大家讨论lsat题，基本集中在前10套题，后面的题跳跃程度比前10套的大，我的假设是大家经过前面的洗礼，从10套题开始正确率大幅提高，以至于只有零星问题可问。嗬嗬... 可是我做后面的题还是有很多疑问，希望大家多帮忙呦。谢谢个先。

23. A group of scientists studying calcium metabolism in laboratory rats discovered that removing the rats' parathyroid glands resulted in the rats' having substantially lower than normal levels of calcium in their blood. This discovery led the scientists to hypothesize that the function of the parathyroid gland is to regulate the level of calcium in the blood by raising that level when it falls below the normal range. In a further experiment, the scientists removed not only the parathyroid gland but also the adrenal gland from rats. They made the surprising discovery that the level of calcium in the rats' blood decreased much less sharply than when the parathyroid gland alone was removed.

Which one of the following, if true, explains the surprising discovery in a way most consistent with the scientists’ hypothesis?

{A) The adrenal gland acts to lower the level of calcium in the blood.

(B) The adrenal gland and the parathyroid gland play the same role in regulating calcium blood levels.

(C) The absence of a parathyroid gland causes the adrenal gland to increase the level of calcium in the blood.

(D) lf the adrenal gland, and no other gland, of a rat were removed, the rat's calcium level would remain stable.

(E) The only function of the parathyroid gland is to regulate the level of calcium in the blood

答案是a，我不太理解，题目中说割掉adrenal gland 这个东东以后，“the level of calcium in the rats' blood decreased much less sharply than when the parathyroid gland alone was removed”，说明它的作用是rise the level of calcium in the rats' blood ,A 为什么会是正确的呢？我选的是b, why not?

24. Since Mayor Drabble always repays her political debts as soon as possible, she will almost certainly appoint Lee to be the new head of the arts commission. Lee has wanted that job for a long time, and Drabble owes Lee a lot for his support in the last election.

Which one of the following is an assumption on which the argument depends?

(A) Mayor Drabble has no political debt that is both of longer standing than the one she owes to Lee and could as suitably be repaid by an appointment to be the new head of the arts commission.

(B) There is no one to whom Mayor Drabble owes a greater political debt for support in the last election than the political debt she owes to Lee.

(C) Lee is the only person to whom Mayor Drabble owes a political debt who would be willing to accept an appointment from her as the new head of the arts commission.

(D) Whether Lee is qualified to head the arts commission is irrelevant to Mayor Drabble's decision.

(E) The only way that Mayor Drabble can adequately repay her political debt to Lee is by appointing him to head the arts commission.

以前讨论见 http://forum.chasedream.com/dispbbs.asp?boardID=24&ID=6310&page=49

这道题问假设，给出的答案基本上是排除他因

A 排除了由其他人更有资格的情况，正确

B不是正确答案，因为它没提关于结论中的 the new head of the arts commission，所以不对

C派出了由其他任何这家伙有同样资格和意愿的人，正确

D不考虑她是否合格，也是一种他因，非他因，正确

E the only way... 说明只有这一种办法还债，更加地排除了他因。正确

一道题我可以发现四个正确答案，很是郁闷，多帮忙啊。感激不尽！

lawyer_1

23。关键对the level of calcium in the rats' blood decreased much less sharply than when the parathyroid gland alone was removed.这句话的理解。它的意思是钙的减少没那末SHARP（没那末快）。much less 修饰sharply,再一起修饰decreased。既然没有单独去掉P那末快，说明P和A的作用是相反的。原文说P是RISE，那末A当然是LOWER

24。都派出他因，但A是最绝对的。

C错。LEE不必是ONLY person。可以有由另一个满足C的情况，但MD照样任命LEE而不违反原文，只要MD欠他的政治债短于LEE（原文还债是AS SOON AS POSSIBLE）

D应为无关项。将它取非。即LEE的资格与这职位有关。它不能否定结论。只是可能影响结论。注意ASSUMPTION 的选项取非必须能否定结论。

E。ADEQUATELY这个词就已经是OUT OF SCOPE了。能否充分还债与原文无关

[此贴子已经被作者于2004-7-10 0:06:58编辑过]

ztlbox

23题的关键在于as soon as possible吗？好难把握呀。 lawyer_1兄，还有一事想问，在假设题中，排除他因应怎样理解？是只要排除一个它因就行还是必须排除所有他因？

直道题我的理解是，都是他因，但要排除一个最直接的他因，也就是说它因也是有优先级的，不知这样理解对不对，如果是这样，判断哪个最优的依据又是什么呢？

lawyer_1

当然必须排除所有他因。但这句话的理解是相对的

ztlbox

结果呢？你的逻辑最后怎么样，我也觉得作lsat挺打击自信的。

和nn们比有差距呀

ztlbox

wcao, 这么牛，早说嘛。对你们这些760，780的牛人two thumbs up! 高山仰止呀。

lawyer_1

这才是真正的NN。