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【GMAT逻辑CR】 -8770 OG16

浏览次数:117 日期:2017-05-08 15:01:02
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?

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.


申友解析:


正确答案是:C


题干:先讲低温杀菌消毒原理,接着说QF公司的净水系统是基于同样的原理,同时考虑到该系统只能在低温环境下工作,所以市政部门仍然需要维持传统净水系统。
题目:下面哪个选项为“市政部门在维护传统净水系统的同时会购买QF的净水系统”这个预测提供了最强有力的论据。
分析:题干和问题中的关键对象是QF的净水系统,关键属性是低温条件下可杀菌消毒。题目考察的逻辑方向是补充型引入他因正向逻辑,所以答案的逻辑方向一定是讲QF净水系统的正面属性同时要考虑到维持旧系统的必要性。
A选项引入无关对象;
B选项同样讨论无关对象,仅仅考虑到旧系统需要被更换无法说明是否需要采购QF的新产品;
D选项:一方面提到天气炎热的情况下无法使用新系统,一方面讨论QF系统在空闲时维护成本很低;
E无关对象的无关属性。

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