【求助】CXD两道assumption题目--新手

Cometrue2009

1. A researcher discovered that people who have low levels of immune-system activity tend to score much olwer 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.

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

b. Mental illness is similar to phusical disease in its effects on body system.

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

d. Mental illness does not cause people's immune-system activit to decrease.

e. Psychological treatment of mental illness in not as effective as is medical treatment.

这道题给出的答案是D，想知道详解为什么。

2. The program to control the entry of illegal drugs into the country was a failure in 1987. If the program had been successful, the wholesale price of most illegal drugs would not have dropped substantially in 1987.

a. The supply of illegal drugs dropped substantially in 1987.

b. The price paid for most illegal drugs by the average consumer did not drop substantially in 1987.

c. Domestic production of illegal drugs increased at a higher rate than did the entry of such drugs into the country.

d. The wholesale price of a few illegal drugs increased substantially in 1987.

e. A drop in demand for most illegal drugs in 1987 was not the sole cause of the drop in their wholesale price.

望高人指点，主要是这种题目怎样来分析。万分感激~~~~~~~

Cometrue2009

自己果然是新手啊，今天做了OG才发现这两道题是ＯＧ上的，而且１１版还有详解～～嘿嘿，再次自嘲一下啦～～～