我也找不到答案的题 NN们帮忙看一下

呼啸700 · 发表于 2011-4-12 09:34:20

3.

For most people, the left half of the brain controls linguistic capabilities, but some people have their language centers in the right half.When a language center of the brain is damaged, for example by a stroke, linguistic capabilities are impaired in some way.Therefore, people who have suffered a serious stroke on the left side of the brain without suffering any such impairment must have their language centers in the right half.

Which of the following is an assumption on which the reasoning in the argument above depends?

A.Certain part of a person’s brain that is damaged by a stroke ever recovers.

B.Impairment of linguistic capabilities does not occur in people who have not suffered any damage to any language center of the brain.

C.Strokes tend to impair linguistic capabilities more severely than does any other cause of damage to language centers in the brain.

D.Even though there are language centers on the left side of the brain, any stroke affecting that side of the brain doesn’t damage either side of them.（我选的答案）

E. It is possible to determine which side of the brain contains a person’s language centers if the person has suffered damage to either side of the brain.

我也找不到答案的题 NN们帮忙看一下

sdcar2010 · 发表于 2011-4-12 10:03:27

To find a necessary assumption, use negation.

If you negate D, then you get : if there are language centers on the left side of the brain, any serious stroke affecting that side of the brain DOES NOT damage at least one of them. If that is the case, the conclusion is wrong because people who suffer strokes on the left but still can talk could have language centers on the left side.

ruirui_hsu · 发表于 2011-7-20 19:13:14

这个题目的的BE选项怎么解释？我完全看不懂B到底在说什么。
不过我就选了B 其他额都被我排除了。包括D。。。。。

我也找不到答案的题 NN们帮忙看一下

所属分类: GMAT考试

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