请教大全-8-13

peiyangzhe

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.

13. 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.

ans: E，我不明白E为什么是假设呢？如果取非，也不能否定这个结论啊？？？

谢谢。

sweatfly

怎么就排除了他因了？

paopaodong

供求决定价格，如果需求的减少不是导致降价的唯一原因，则一定是供给太多了，那就可以理解了.

peiyangzhe

If the program had been successful, the wholesale price of

most illegal drugs would not have dropped substantially in 1987
==>The program to control the entry of illegal drugs into the

country was a failure in 1987.
对吗？
如果是这样的话，assumption 应该是对结论的，而不是对论据的，对吗？

而答案却是对论据的，是不是有问题？

谢谢。

detectiveyang

assumption对结论是什么意思? assumption本身是结论的必要条件.

你找到的原文的逻辑关系是正确的. 正如renprince和cranberry所说, 此

题是典型的排除它因类型. 如果有其它原因对结论有绝对的影响, 那么原

文对program的结论不成立. 简单的例子: .我节食失败了. 因为如果我节

食成功, 我就不会更胖了. 这里就忽略了一个问题, 其错误在于: 节食很

可能只是减肥的一个必要条件, 而原文把它作为充分条件. 即节食-->减肥

==>非减肥-->节食失败. 所以要使原文结论成立, 必须假设节食为充分条

件,既没有其它因素对减肥起作用. 如果问weaken, 那可以是体内激素失调

造成了更胖, 既节食和极素平衡同为必要条件.

你要记住此类题型, 有了感觉以后根本无须考虑很多, ETS送分给你.