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题库 / Prep2007E1-CR-61
Which of the following best completes the passage below?
At a recent conference on environmental threats to the North Sea, most participating countries favored uniform controls on the quality of effluents, whether or not specific environmental damage could be attributed to a particular source of effluent. What must, of course, be shown, in order to avoid excessively restrictive controls, is that __________.
any uniform controls that are adopted are likely to be implemented without delay
any substance to be made subject to controls can actually cause environmental damage
the countries favoring uniform controls are those generating the largest quantities of effluents
all of any given pollutant that is to be controlled actually reaches the North Sea at present
environmental damage already inflicted on the North Sea is reversible
stimulus：会议的目的是保护北海不被污染，措施是采取统一的控制办法控制污染物排放，题目是避免过度限制
做题前predict一下可能的选项： 避免过度限制=该限制的还是得限制+不需要限制的不要被限制，那可能选项是限制了不需要被限制的污染物。
先用排除法排出ace，a中delay跟题目无关；c跟是不是主要污染国无关，只要有污染就需要限制；e已经发生的和即将采取的措施无关
剩下bd，用取非的办法：
取非b： 控制的排放物中，不是所有都会造成污染，符合predict，如果不会造成污染就没有控制的必要
取非d选项：目前不是所有的污染物都会汇入北海，也就是说有些会污染北海的物质暂时不会汇入，但最终可能会汇入，那并没有完全限制住以后会汇入的可能性
对比bd，选b更能达到有效控制污染物但是又不会过度控制的效果
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