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标题: OG2 GMAT究竟要不要常识啊?! [打印本页]

作者: ford424 时间: 2005-4-1 20:43
标题: OG2 GMAT究竟要不要常识啊?!
2. The average life expectancy for the United States population as a whole is 73.9 years, but children born in Hawaii will live an average of 77 years, and those born in Louisiana, 71.7 years. If a newlywed couple from Louisiana were to begin their family in Hawaii, therefore, their children would be expected to live longer than would be the case if the family remained in Louisiana.

Which of the following, if true, would most seriously weaken the conclusion drawn in the passage?

A. Insurance company statisticians do not believe that moving to Hawaii will significantly lengthen the average Louisianan’s life.

B. The governor of Louisiana has falsely alleged that statistics for his state are inaccurate.

C. The longevity ascribed to Hawaii’s current population is attributable mostly to genetically determined factors.

D. Thirty percent of all Louisianans can expect to live longer than 77 years. C

E. Most of the Hawaiian Islands have levels of air pollution well below the national average for the United States.

C is the best answer. This choice suggests that a significant proportion of Hawaii’s population is genetically predisposed to be long lived. Since Louisianans are not necessarily so predisposed, and since the Louisianans’ children will acquire their genetic characteristics from their parents, not from their birthplace, this choice presents a reason to doubt that Hawaiian born children of native Louisianans will have an increased life expectancy. Therefore, this choice is the best answer.

Because the conclusion concerns people born in Hawaii, not the average Louisianan, A does not weaken the conclusion. Because the governor’s allegation is false, it cannot affect the conclusion. D fails to weaken the conclusion because it is consistent with the information given and the conclusion about life expectancy. By suggesting that Hawaii’s environment is in one respect particularly healthy, E supports the conclusion.

这题相信大家都做过, 但是感觉这个genetic出来的相当莫名其妙,虽然答案可以选出来,但是感觉GMAT还是要具有很多常识啊?!

可是有的题目又怕常识一用就错,到底怎么把握呢?还是这题有什么别的玄机?!

请教大家了!

谢谢!!

作者: mindfree 时间: 2005-4-2 02:25
You need lots of common sense in CR. What is common sense? Water is not oil. I used one example before: worker will be happy if they get a raise in salary. In this question, the common sense is that genetic traits of human being will not be acquired by moving to one location.

作者: ford424 时间: 2005-4-2 09:26

thanks Mindfree.

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