Leachate is a solution,frequently highly contaminated,that developed when water permeates a landfill site. If and only if the landfill's capacity to hold liquids is exceeded does the leachate escape into the envirnment, 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. (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 enviroment. (c)no sewage treatment plants are capable of handlingleachate (d)some landfill leachate is sent 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. 答案e。 我不明白d哪错了。记得以前做四六级时，infer的内容在题干上是不能直接说的，d是不是直接说了？
忘了贴问题了吧 Which one of the following can be inferred from the passage? A 无关信息 volume? B 无关因果 any water permeates --->L'll escape into environment C 与原文因果不一致 not all ...capable --???--> No....is capable 部分否定-->全部否定 D 与原文因果不一致 not all ...capable ---???--> ....plants that are incapable of handling it.部分否定-->全部否定 E 正确 if a then b a---->b only if a then b b---->a if and only if a then b 则 a<---->b AB互为充分必要条件
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发表于 2004-1-10 10:56:00
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