两个逻辑题 不明白！

yzhao2xiaotong

• 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.
       
       The argument in the passage depends on which of the following     assumptions?
       
       (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.
  
• 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.
  

yzhao2xiaotong

benjaminsandro 发表于 2015-5-28 14:28
1. control the entry失败，推论应该是entry成功扩大，而题目的推论是批发价格降低。
缺失的是entry（体现 ...

Thank you!!!明白点了

benjaminsandro

1. control the entry失败，推论应该是entry成功扩大，而题目的推论是批发价格降低。
缺失的是entry（体现为“量”）和wholesale price之间的关系。
2. 试验表明A的某状态伴随B的某状态出现，结论是是A影响了B。
所以前提假设就是：不是B影响了A