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陌下清风 · 发表于 2010-8-26 13:06:02

The brains of identical twins are genetically identical. When only one of a pair of identical twins is a schizophrenic(精神分裂症), certain areas of the affected twin’s brain are smaller than corresponding areas in the brain of the unaffected twin. No such differences are found when neither twin is schizophrenic. Therefore, this discovery provides definitive evidence that schizophrenia is caused by damage to the physical structure of the brain.
If the statements on which the conclusion above is based are all true, each of the following could be true EXCEPT:

If the statements on which the conclusion above is based are all true, each of the following could be true EXCEPT:
(A) People who lack a genetic susceptibility(脆弱)for the disease will not develop schizophrenia
(B) Medications can control most of the symptoms of schizophrenics share many of the characteristics found in those of people without the disorder
(C) The brains of schizophrenics share many of the characteristics found in those of people without the disorder
(D) It will eventually be possible to determine whether or not someone will develop schizophrenia on the basis of genetic information alone
(E) Brain abnormalities associated with schizophrenia are the result of childhood viral infections that inhibit the development of brain cells

答案为D，但是A呢？是因为D选项中alone导致他错误吗？望指教，谢谢~~~

jinnling · 发表于 2010-8-26 18:06:46

这道题的答案是D么，怎么我的资料上是C啊

heygika · 发表于 2010-8-26 18:54:03

这种题,答案是和原文矛盾的.

错误的答案有两个特征: 从原文推出是对的;不知对错的.

题目说identical twins的brains是genetically identical,而其中一个有schizophrenia,另一个又没有,所以单从genetic information是不能确定一个人是否schizophrenia的.
而D说: on the basis of genetic information alone..显然错了..

A. 不能从文中信息推出是否正确.

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