GMAT申友逻辑CR题库-【OG20-P569-634题】Snowmaking machines work by spraying a mist that freezes immediately on contact with cold air. Because the sudden freezing kills-OG16-真题答案解析

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CR544-556题

【OG20-P569-634题】

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.

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答案：

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； C选项正确； 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。