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feifei-91

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楼主
发表于 2005-7-19 00:11:00 | 只看该作者

feifei-91


91. Leachate is a solution, frequently highly contaminated, that develops when water permeates a landifill’s site. If and only if the landfill’s capacity to hold liquids is exceeded does the leachate escape into the environment, generally in unpredictable quantities. A method must be found for disposing of leachate. Most landfill leachate is sent 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.        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 sent to sewage treatment plants that are incapable of handling it. 4


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



为什么D选项 错误?谢谢!

沙发
 楼主| 发表于 2005-7-22 12:41:00 | 只看该作者
NN都去吃草了吗?哎。。。
板凳
发表于 2005-8-8 02:13:00 | 只看该作者

我不是nn,我选的也是d


总觉得解释里的说法是错的,e的方向推反了

地板
发表于 2007-8-22 17:43:00 | 只看该作者

赞成D.

E并不是逆否命题,解释不对.

5#
发表于 2007-8-23 17:22:00 | 只看该作者

The passage dosen't mention that it will send some landfill leachate that is not capable of handle the polluntion, D involve some new items,so it is wrong, and e is correct because "If and only if the landfill’s capacity to hold liquids is exceeded does the leachate escape into the environment"

6#
发表于 2008-7-3 19:46:00 | 只看该作者
up
7#
发表于 2008-7-3 19:57:00 | 只看该作者
up
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