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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.

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

By suggesting that Hawaii’s environment is in one respect particularly healthy, E supports the conclusion.

答案E OG 解释 是 SUPPORT 可是它是不是 ASSUMPTION 呢，我是不是可以通过 取非的 方法来判断。既若取非后，原命题还成立就是 SUPPORT 若不成立就是 ASSUMPTION 。

可是这个句子怎么取非，??

我的意思是象 SOME ,ANY , MOST,...这些词在取非时是不是也要变？？？

在线等待。。。。。。

不好意思，没明白你的问题，你到底是问假设题如何取非，还是问这道题目的答案是否等同假设？

加强题的答案有时候可能是假设，削弱题的答案有时候可能是将默认的假设断桥。但是这不是唯一的答案方向。从GWD看，这种简单的答案已经越来越少了，尤其是加强，基本没有假设类的答案了。

置顶的精华贴里有lawyer的系列文章，详细说明了各类题型的解法，以及还有一篇《假设题如何取非》的文章，请参考。

【系统学习】─ ─ 复习方法、分类总结、精华讨论  [ 2]