2. 外语
  3. 21 . The program to control the entry of illegal drugs into the country was a failure in 19If the program had been successful, t

21 . The program to control the entry of illegal drugs into the country was a failure in 19If the program had been successful, t

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问题 21 . The program to control the entry of illegal drugs into the country was a failure in 19If the program had been successful, the wholesale price of most illegal drugs would not have dropped substantially in 19The argument in the passage depends on which of the following assumptions?
选项 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.
答案E
解析 要合理地从违法药物批发价的下降得出该计划失败这个结论，惟一必须正确的选项是(E)，正确答案，如果是由需求下降引起的价格下降，就没有理由怀疑有任何由进入该国的药物增加而引起的供给增加。其他选项由于对该争论没有影响，因此是错误的.违法药物的供给不一定下降[选项(A)]，零售价可以下降[选项(B)]，违法药物进入该国的速度可以上升到比国内生产更快的水平上[选项(C)]，违法药物不一定必须经历价格大幅上升的过程[选项(D)]。
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