天山-9-40

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 damanged, for example by a stroke, linguistic capabilities are impaired in some way,. there fore, 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 liguistic 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 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.

Ans: D

Why A is not right?

终于找到了

http://forum.chasedream.com/dispbbs.asp?BoardID=24&ID=45213

我觉得A对, 题干说左脑受创,但语言能力无损,所以语言中枢在右脑. A说左脑受创以后不会恢复. 如果恢复了就判断不了语言中枢在右脑了.

可是D也有道理. 是由when a language center of the brain is damanged, for example by a stroke, linguistic capabilities are impaired in some way,.这里判断的.

不知道我的思路哪里有问题, 有人帮忙解答么?

Up!

ask for help!

Nobody pays attention to me . upset.....

where is lawyer?

I read through all the content discussed about this problem. But no discussion is related to choice A.

Anyway , thanks for your reply.

我试着用我有限的逻辑知识解释一下A吧，A的意思是说大脑的左边和右边在受到中风后都不能恢复。8楼的理解可能是因为不能恢复，所以左脑损伤了，就一定导致语言能力下降，所以如果语言能力没下降，language centers就一定在右脑。而这样的假设中又含了一个假设，中风至少损害了一个language center，也正是D所讲的。用取非验证一下：

A取非，左右都能恢复（如果不是100%恢复，是不是还有有impair?)

D取非：没有损伤任何一个language center，languages centers可能还在左脑，虚弱结论。

我觉得应该特别注意文中的a language center和language centers单复数问题和for example....的迷惑。

不足之处，请指教。

A不对因为是OUT OF SCOPE.

坏后是否恢复不是讨论范畴,

A项说大脑恢复不恢复和语言功能没有直接关系,首先大脑坏了语言系统也不一定坏,恢复了语言系统也不一定好.

其次恢复与否是以后的事,如果中风以后有DAMAGE语言功能,但后来又恢复了,其实还是有DAMAGE,

所以不是假设