gwd3-40

yushuang5555

Q40:

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 No 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 If there are language centers on the left side of the brain, any serious stroke affecting that side of the brain damages at least one of them.

E It is impossible to determine which side of the brain contains a person’s language centers if the person has not suffered damage to either side of the brain.

Answer: D

郁闷，为什么b不对呢？？？可以帮忙分析下b选项吗？谢谢谢谢~~~~~

zhu_eagle

前提：伤(damage)-->弱(impairment)。假设题，承认文章事实。

结论：打(stroke)左边-->左边没弱-->语言点在右边。隐含了打左边-->左边必伤,即D项。

可以这样看，不管推理：(伤--弱)-->(打--弱), 假设了(打--伤)。

B项：没伤-->没弱。1、做题时这样想：这是伤与弱的关系，无关，文章假设了打与伤的关系。2、分析时这样想：A-->B可得B非-->A非，而不一定A非-->B非。于是没伤-->没弱,可得弱-->伤,而不一定伤-->弱，与前提伤-->弱矛盾。3、假若用取非削弱来看。取非B项，没伤-->弱，加上文章前提事实伤-->弱，就是伤不伤都弱，即伤跟弱没关系了，与前提伤-->弱矛盾。

一家之言，未必正确，仅供参考。关于分析时的想法，只是找个理由说服自己，做题时可能没什么用，我是觉得D太明显是答案了，于是B立马排除。

[此贴子已经被作者于2008-5-11 15:04:42编辑过]

yushuang5555

谢谢大侠热心的回答！！！！