问一道prep29，鱼的反应测地震。已经查贴，没有人问过

russellguo

To reduce the danger to life and property posed by major earthquakes, scientists have been investigating several techniques for giving advance warning of dangerous earthquakes.  Since catfish swim erratically before earthquakes, some investigators have proposed monitoring catfish to predict dangerous earthquakes.

Which of the following, if true, most seriously undermines the usefulness of the proposal?

 

(A) In Japan, which is subject to frequent earthquakes, the behavior of catfish has long been associated with earthquakes.

(B) Mechanical methods for detecting earthquakes have not proved effective.

(C) Tremors lead to the release of hydrogen sulfide gas into water, thereby causing various fish and shellfish to behave erratically.

(D) Careful construction can reduce the dangers posed by earthquakes.

(E) Even very slight, fleeting tremors cause catfish to swim erratically.

正确答案是E，我在C和E之间徘徊良久，无法排除C。

文中推理过程用鱼的反应来预测地震，那么C给出了个他因：鱼还可能对某种gas有反应，那不就是削弱了结论么？

E我觉得有点加强的意思啊，某鱼要是对小小的动静都有反映，对监测地震不就是更有效了么？

牛牛们点解啊～ 

 

maggiecookies

 我也做错了这道题, 现在我是这样理解的:

  E:原文都说啦catfish swim erratically before earthquakes...

现在答案是说, Even very slight, fleeting tremors cause catfish to swim erratically.

  这两个动作都是一样的... 那么怎么辨别是, earthquake 还是 every slight 的东西...

C: 可是, C 的前面你没看全:Tremor: 震动...-----我做的时候, 不认识这个单词, 和你异样选的C,

   震动-使气体增加0-   behave erratically......

    这可以是对原文的解释, 不可能是削弱的.

russellguo

明白啦！谢谢maggiecookies～