7. 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[url=] the immune system protects against mental illness as well as against physical disease.[/url] [c1] The researcher's conclusion depends on which of the following assumptions? [url=] (Al[/url] [c2] High immune-system activity protects against mental illness better than normal immune system activity does.[url=] ([/url] 8l[c3] Mental illness is similar to physical disease in its effects on body systems. (C) People with [url=]high immune-system[/url] activity cannot develop mental illness. [url=] (Dl [/url] [c5] Mental illness does not cause people's immune system activity to decrease. [url=] (El [/url] [c6] Psychological treatment of mental illness is not as effective as is medical treatment.
这道题目应该选哪个，为什么应该选那个选项呢 | 
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发表于 2014-6-19 16:28:20
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