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【GMAT逻辑CR】8818-OG16

浏览次数:17 日期:2017-05-17 15:19:54
Installing scrubbers in smokestacks and switching to cleaner-burning fuel are the two methods available to Northern Power for reducing harmful emissions from its plants. Scrubbers will reduce harmful emissions more than cleaner-burning fuels will. Therefore, by installing scrubbers, Northern Power will be doing the most that can be done to reduce harmful emissions from its plants. Which of the following is an assumption on. which the argument depends?

Installing scrubbers in smokestacks and switching to cleaner-burning fuel are the two methods available to Northern Power for reducing harmful emissions from its plants. Scrubbers will reduce harmful emissions more than cleaner-burning fuels will. Therefore, by installing scrubbers, Northern Power will be doing the most that can be done to reduce harmful emissions from its plants.

Which of the following is an assumption on. which the argument depends?

 A

Switching to cleaner-burning fuel will not be more expensive than installing scrubbers.

 B

Northern Power can choose from among various kinds of scrubbers, some of which are more effective than others.

 C

Northern Power is not necessarily committed to reducing harmful emissions from its plants.

 D

Harmful emissions from Northern Power's plants cannot be reduced more by using both methods together than by the installation of scrubbers alone.

 E

Aside from harmful emissions from the smokestacks of its plants, the activities of Northern Power do not cause significant air pollution.


【申友解析】


正确答案:D


题干:在烟囱上安装清洁器和转向使用清洁能源是NP公司减排的两种方案,清洁器比清洁能源效果更好,所以只要安装了清洁器,NP就在最大程度上实现了减排。
题目:下面哪一个选项是题目结论所依赖的假设条件。
分析:补充假设条件排除他因型正向逻辑,先考察否定句式选项。

选项A, 谈成本,无关属性,排除!

选项C,谈减排的必要性,无关属性,排除!

选项D,两种方式同时使用不会在更大程度上实现减排。取反验证,假设两种方式同时使用可以在更大程度上减排那么题干结论被推翻,正确!

选项E,ASIDE FROM HARMFUL EMISSION。。。直接排除!

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