问道洛基！明天就要考了！急求教！

傻熊有傻福

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.

我知道E更好，想问C为什么不对，我觉得也可以啊~

chasingM7

C) irrelevent / support the conclusion actually.

you want to find a new premise that tells you that the behavior of catfish cannot be used as a good warning.
C talks nothing about catfish. so it is out!

even C says various fish, including catfish if u like, behave erratically. it actually supports the conclusion rite?

qy0001

题目的逻辑是因为地震会引起某某鱼behave erratically， 所以可以用这种鱼去预测地震
C应该是无关选项呀
LZ是认为其它鱼behave erratically会导致观测不清楚么   但是这个不属于文中逻辑的一部分呀

傻熊有傻福

C) irrelevent / support the conclusion actually.

you want to find a new premise that tells you that the behavior of catfish cannot be used as a good warning.
C talks nothing about catfish. so it is out!

even C says various fish, including catfish if u like, behave erratically. it actually supports the conclusion rite?

-- by 会员 chasingM7 (2011/8/24 11:36:17)

but I wonder if various fish,including catfish, behave erratically,then catfish cannot be used as a sign of earthquake prediction by scientist,so weaken~

傻熊有傻福

顶啊！

qy0001

楼主上面那个解释   因为其他鱼behave erratically而不能预测地震 不能   直接   weaken结论   因为你还需要假设当所有鱼behave
erratically的时候  会导致观测不清楚    而这个假设文中没提  也不一定正确
而E就直接weaken了

傻熊有傻福

楼主上面那个解释   因为其他鱼behave erratically而不能预测地震 不能   直接   weaken结论   因为你还需要假设当所有鱼behave
erratically的时候  会导致观测不清楚    而这个假设文中没提  也不一定正确
而E就直接weaken了

-- by 会员 qy0001 (2011/8/24 11:50:02)

嗯嗯，也对~呵呵，很感谢大家啊！

qy0001

楼主好运！

傻熊有傻福

谢谢！