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标题: OG13-1!!!! [打印本页]

作者: fsl619831 时间: 2013-9-22 10:46
标题: OG13-1!!!!
1.
Snowmaking machines work by spraying a mist that freezes immediately on contact with cold air. Because the sudden freezing kills bacteria, QuickFreeze is planning to market a wastewater purification system that works on the same principle. The process works only when temperatures are cold, however, so municipalities using it will still need to maintain a conventional system.
Which of the following, if true, provides the strongest grounds for a prediction that municipalities will buy QuickFreeze's purification system despite the need to maintain a conventional purification system as well?
(A) Bacteria are not the only impurities that must be removed from wastewater.
(B) Many municipalities have old wastewater purification systems that need to be replaced.
(C) Conventional wastewater purification systems have not been fully successful in killing bacteria at cold temperatures.
(D) During times of warm weather, when it is not in use, QuickFreeze's purification system requires relatively little maintenance.
(E) Places where the winters are cold rarely have a problem of water shortage.

我用排除法做最后是选的C，但是真的不太理解这个的意思，为什么Conventional wastewater purification systems 不能完全有效反而成了 municipalities will buy的支持呢？？？？
求解答！

作者: vertex顶点 时间: 2013-9-22 10:57
理解题干：P--MC premise是在低温度下这种system可以有效kill bacteria Main conclusion是：1.我们要买这种新的system 2.我们还要保持老的机器

文中哪个选项加强了原文的结论：即虽然还是要保持老机器，但QF依然要买新机器？
关注原文的问题：文章问的是你：为啥要买新机器？而不是问你：为啥要保持老机器？
C：老机器在低温的时候不能很好的杀菌
所以C就是加强买新机器的原因。因为新机器在低温杀菌有效，弥补了老机器的不足
这道题属于中等偏上难度的加强题了，因为文章的结论有2个部分，它让你加强的只有一个部分

作者: fsl619831 时间: 2013-9-22 12:46

vertex顶点发表于 2013-9-22 10:57
理解题干：P--MC premise是在低温度下这种system可以有效kill bacteria Main conclusion是：1.我们要买这 ...

谢谢！！！！！这个题真的比较晕啊

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