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.
明白为什么选D.
但是对于C.将其取非后原文结论也不成立。为什么C不对?
C取非:
C. People with high immune-system activity can develop mental illness.
免疫系统高的人都得mental illness说明免疫系统不能抵抗mental illness。(原文取非)
思路那里错了?现在正为取非糊涂着。。。
xdjm们救救我!谢谢!:)
[此贴子已经被作者于2006-3-31 21:40:41编辑过] |