LSAT-3-1-12

flywood

12. Leachate is a solutions, frequently highly contaminated, that develops when water permeates a landfill site, If and only if the landfill's capacity to hold liquids is exceeded does the leachates escape into the environment, generally in unpredictable quantities, A method must be found for disposing of leachate. Most landfill leachate is send directly to sewage treatment plants, but not all sewage plants are capable of handling the highly contaminated water.

Which one of the following can be inferred from the passage?

(A) The ability to predict the volume of escaping landfill leachate would help solve the disposal problem.

(B) (B)If any water permeates a landfill, leachate will escape into the environment.

(C) No sewage treatment plants are capable of handling leachate.

(D) Some landfill leachate is send to sewage treatment plants that are incapable of

handling it.

(E) If leachate does not escape from a landfill into the environment, then the landfill's capacity to hold liquids has not been exceeded.

E是逆否命题可以,D为什么不能成为答案?

valarie

D is only a possiblity. But can't be sure about it.

sherryly

以下是引用valarie在2004-8-15 5:37:00的发言：
D is only a possiblity. But can't be sure about it.

但题目中说“not all"可以对应some阿

请教。。。

happythree

D stress on an action. But "but not all sewage plants are capable of handling the highly contaminated water." is the result from experiment or in the lab.  For example, we know that some the rubbish can be recycled, but not all of them. So we need not send all the rubbish to the recycle bin.

It is my view , open to discuss.

dphxmg

You didn't figure out the posibility that leachate may have been directly sent to those sewage plants capable of disposing of it.

happythree

I mean some leachate is really sent to those sewage plants capable of disposing of it, but it is not sent to those incapable of handling that.

dphxmg

sorry, happythree: i didn't say that to you. I just wanted to explain why D is not the key.

happythree

It doesn't matter. We all fight for the clearness.

beautyup

UP!

I have the same question: why D isnt the right answer?

偶感觉D是“Most landfill leachate is send directly to sewage treatment plants, but not all sewage plants are capable of handling the highly contaminated water.” 推出“A method must be found for disposing of leachate.”的一个桥梁。为什么不正确呢？