求助 og048

cissie0128

48. 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. D

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

48.

The researcher concludes from the association of low immune-system activity with low mental-health sores that, in effect, immune system activity can inhibit mental illness. If, contrary to D, mental illness can depress immune-system activity, the association mentioned does not support the researcher’s conclusion. So D must be assumed.

这里是在取非么，对d选项取非后是心理疾病会引起免疫系统下降，和原文有什么矛盾的呢？

dreamchaserdan

呵呵，今天刚好看到这道题。我的理解如下：

这是个因果型结论，OG的解释认为low levels of immune-system activity和lower test score of mental health同时存在，所以认为结论这两者有因果关系，而且是前者引起后者。作为assumption题的答案D，应该是否认因果倒置的可能性，也就是说不是后者引起前者。如果将这个答案取非，的确是后者引起前者，题目中的结论就是错误的。

cissie0128

差不多了，谢谢哦