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gmatedwina · 发表于 2005-8-23 17:56:00

21. Historian: We can learn about the medical history of individuals through chemical analysis of their hair. It is likely, for example, that Isaac Newton’s psychological problems were due to mercury poisoning; traces of mercury were found in his hair. Analysis is now being done on a lock of Beethoven’s hair. Although no convincing argument has shown that Beethoven ever had a venereal disease, some people hypothesize that venereal disease caused his deafness. Since mercury was commonly ingested in Beethoven’s time to treat venereal disease, if researchers find a trace of mercury in his hair, we can conclude that this hypothesis is correct.

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

(A) None of the mercury introduced into the body can be eliminated.

(B) Some people in Beethoven’s time did not ingest mercury.

(C) Mercury is an effective treatment for venereal disease.

(D) Mercury poisoning can cause deafness in people with venereal disease.

(E) Beethoven suffered from psychological problems of the same severity as Newton’s.

24. The interstitial nucleus, a subregion 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 who 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 who 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.

47. High school students who feel that they are not succeeding in school often drop out before graduating and go to work. Last year, however, the city’s high school dropout rate was significantly lower than the previous year’s rate. This is encouraging evidence that the program instituted two years ago to improve the morale of high school students has begun to take effect to reduce dropouts.

Which one of the following, if true about the last year, most seriously weakens the argument?

(A) There was a recession that caused a high level or unemployment in the city.

(B) The morale of students who dropped out of high school had been low even before they reached high school.

(C) As in the preceding year, more high school students remained in school than dropped out.

(D) High schools in the city established placement offices to assist their graduates in obtaining employment.

(E) The antidropout program was primarily aimed at improving students’ morale in those high schools with the highest dropout rates.

53. When investigators discovered that the director of a local charity had repeatedly overstated the number of people his charity had helped, the director accepted responsibility for the deception. However, the investigators claims that journalists were as much to blame as the director was for inflating the charity’s reputation, since they had naively accepted what the director told them, and simply reported as fact the numbers he gave them.

Which one of the following principles, if valid, most helps to justify the investigators’ claim

(A) Anyone who works for a charitable organization is obliged to be completely honest about the activities of that organization.

(B) Anyone who knowingly aids a liar by trying to conceal the truth from others is also a liar.

(C) Anyone who presents as factual a story that turns out to be untrue without first attempting to verify that story is no less responsible for the consequences of that story than anyone else is.

(D) Anyone who lies in order to advance his or her own career is more deserving of blame than someone who lies in order to promote a good cause.

(E) Anyone who accepts responsibility for a wrongful act that he or she committed is less deserving of blame than someone who tries to conceal his or her own wrongdoing.

请教~~~

懒猫必胜 · 发表于 2005-8-24 04:04:00

24. The interstitial nucleus, a subregion 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?

前提1：A(The interstitial nucleus)是大脑中某部分B(hypothalamus)的一个分区，通常雄猫的A都比雌猫的小。

前提2：凡死于某病X的雄猫，其A部位变得跟雌猫体内的A一样大。

结论：A的大小决定雄猫是否会感染X病。

E选项的意思：X病是Y病的一种，现已知大脑中的B部分跟Y病都没有关系。这就表示，A跟X病也没有关系。这就好比说：水果跟肺部病变没有关系，所以桃子不会引起肺气肿

47. High school students who feel that they are not succeeding in school often drop out before graduating and go to work. Last year, however, the city’s high school dropout rate was significantly lower than the previous year’s rate. This is encouraging evidence that the program instituted two years ago to improve the morale of high school students has begun to take effect to reduce dropouts.

前提1：通常感觉自己在学校表现不好的高中生都会在毕业前辍学转而去工作。

前提2：去年市里高中的辍学率比前一年显著降低

结论：两年前开始的一个提高高中生道德水准的项目开始起作用了。

A是最好的答案：去年的经济萧条引起了很高的失业率。所以想辍学的高中生没工作可以只好继续呆在学校，并不是那个PROGRAM在起作用。

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