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标题: [求助]og11的这题怎么理解呢？ [打印本页]

作者: happypoor88 时间: 2007-8-1 10:01
标题: [求助]og11的这题怎么理解呢？

A researcher discovered that people who have low levels of immune-system activity tend to score much lower on tests of mental health than do people with normal or high immune-system activity. The researcher concluded from this experiment that the immune system protects against mental illness as well as against physical disease

The researcher’s conclusion depends on which of the following assumptions?

A. High immune-system activity protects against mental illness better than normal immune-system activity does.

B. Mental illness is similar to physical disease in its effects on body systems.

C. People with high immune-system activity cannot develop mental illness.

D. Mental illness does not cause people’s immune-system activity to decrease.

E. Psychological treatment of mental illness is not as effective as is medical treatment.

这题为什么选择D呢？这类ASSUMPTION题没有逻辑链断层，新东方老师说是找出否定任何有可能削弱原文结论的意见，因为原文作者认为自己的推理完全正确，那么D选项取非后应该是Mental illness 会引起immune-system activity 下降，那怎么削弱了原文了呢？

作者: tommytang 时间: 2007-8-1 10:24

这题的conclusion是immune system protects against mental illness as well as against physical disease,根据的事实是immune system低的人在测试mental health中的得分低于正常或高immune system的人，所以这题认为是low immune system导致mental health降低的。对选项D取非后则是mental illness导致immune system下降，和题目中的推理正好因果颠倒，所以是消弱了原文。

作者: happypoor88 时间: 2007-8-1 10:55

哦～～～懂了，因果倒置，十分感谢tommytang，真是好人！

作者: binfenliu 时间: 2007-8-5 23:55
谢谢,这个题,我也挺迷惑.

作者: CShadow 时间: 2007-8-6 00:26
感觉在GMAT很多题目与这题很像。就是在问assumption的题中，题干中A－＞B，而选项中B－＞A，那么一般这个选项就是正确答案了。

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