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题库 / GMATLA-CR-16
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 brains 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?
No part of a person's brain that is damaged by a stroke never recovers
Impairment of linguistic capabilities does not occur in people who have not suffered any damage to any language center of the brain.
Strokes tend to impair linguistic capabilities more severely than does any other cause of damage to language centers in the brain.
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.
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
题目中的结论是，如果左脑中风而没有影响语言能力的人---前提，那么这个人就是右脑控制语言能力。所以假设应该就是，左脑的中风一定会伤害左脑或者右脑的功能，才会有右脑的事，否则左脑没坏，还关右脑什么事啊。。。这种题的假设就是应该使前提条件有意义
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