[求助]费费逻辑24，29，45，请大家帮助我一下

janejane1009 · 发表于 2007-8-12 17:02:00

24. The interstitial nucleus, a sub-region of the brain’s hypothalamus, is typically smaller for male cats than for female cats. A neurobiologist performed autopsies on male cats who died from disease X, a disease affecting no more than .05 percent of male cats, and found that these male cats had interstitial nuclei that were as large as those generally found in female cats. Thus, the size of the interstitial nucleus determines whether or not male cats can contract disease X.

Which one of the following statements, if true, most seriously weakens the argument?

A. No female cats have been known to contract disease X, which is a subtype of disease Y.

B. Many male cats that contract disease X also contract disease Z, the cause of which is unknown.

C. the interstitial nuclei of female cats who contact disease X are larger than those of female cats who do not contract disease X.

D. Of 1,000 autopsies on male cats that did not contract disease X, 5 revealed interstitial nuclei larger than those of the average male cat.

E. The hypothalamus is known not to be causally linked to disease Y, and disease X is a subtype of disease Y.

答案是E，可以理解，但是D为什么不对呢？

是因为文中说的 whether or not male cats can contract disease X. 并没有表示一定大就一定会得的意思？

29. The price of a full-fare(全票价) coach ticket from Toronto to Dallas on Breezeway Airlines is the same today as it was a year ago, if inflation is taken into account by calculating prices in constant dollars. However, today 90 percent of the Toronto-to-Dallas coach tickets that Breezeway sells are discount tickets and only 10 percent are full-fare tickets, whereas a year ago half were discount tickets and half were full-fare tickets. Therefore, on average, people pay less today in constant dollars for a Breezeway Toronto-to-Dallas coach ticket than they did a year ago.

Which one of the following, if assumed, would allow the conclusion above to be properly drawn?

(A) A Toronto-to-Dallas full-fare coach ticket on Breezeway Airlines provides ticket-holders with a lower level of service today than such a ticket provided a year ago.

(B) A Toronto-to-Dallas discount coach ticket on Breezeway Airlines costs about the same in constant dollars as they did a year ago.

(C) All full-fare coach tickets on Breezeway Airlines cost the same in constant dollars as they did a year ago.

(D) The average number of coach passengers per flight that Breezeway Airlines carries from Toronto to Dallas today is higher than the average number per flight a year ago.

(E) The criteria that Breezeway Airlines uses for permitting passengers to buy discount coach

答案选B，我没有怎么弄懂文章意思，if inflation is taken into account by calculating prices in constant dollars是什么意思？

考虑了通货膨胀之后的实际价格吗？即一年前100元，现在200元，但因为通过膨胀了100％，所以实际价格不变的意思吗？

那么B，C选项怎么判断？

原价不变和打折后不变，有什么区别？

45. Commissioner: Budget forecasters project a revenue shortfall of a billion dollars in the coming fiscal year.
Since there is no feasible way to increase the available funds, our only choice is to decrease expenditures. The plan before you outlines feasible cuts that would yield savings of a billion dollars over the coming fiscal year. We will be able to solve the problem we face, therefore, only if we adopt this plan.

This reasoning in the commissioner’s argument is flawed because this argument

A. relies on information that is far from certain

B. confuses being an adequate solution with being a required solution

C. inappropriately relies on the opinions of experts

D. inappropriately employs language that is vague

E. takes for granted that there is no way to increase available funds

答案选B

宝典上的分析为：

思路：年度财务预算下一财年收入不足量one billion dollars，由于没有feasible way增加可得资金，只有削减开支。因而只是做了一个如何之间节省10亿美金的计划，it is just a required solution but not adequate maybe.

而我觉得意思刚好相反，是一个adequate solution, 但不是required solution(必须）。 only if 后面表示必要条件

请大家帮忙分析一下，十分感激！！

[此贴子已经被作者于2007-8-12 17:03:03编辑过]

wslinfeng · 发表于 2007-8-12 23:56:00