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GRE阅读逻辑题训练(64)

2017-04-03 09:15:00来源:新东方在线整理

  为了帮助大家练习GRE阅读逻辑题,新东方在线GRE频道为大家带来GRE阅读逻辑题训练(64)一文,希望对大家GRE备考有所帮助。更多精彩尽请关注新东方在线GRE频道!

  Because the process of freezing food consumes energy, many people keep their electric freezers half-empty, using them only to store commercially frozen foods. Yet freezers that are half-empty often consume more energy than they would if they were kept fully stocked.

  Which of the following, if true, contributes most to an explanation of the apparent discrepancy described above?

  A:A given volume of air in a freezer requires much more energy to be maintained at a temperature below freezing than does an identical volume of frozen food.

  B:The more often a freezer’s door is opened, the more energy is required to maintain that freezer’s normal temperature.

  C:When unfrozen foods are placed in a freezer, the average temperature of a given volume of air inside that freezer rises temporarily.

  D:A person who normally maintains a half-empty freezer can cut energy costs considerably by using a freezer that is 50 percent smaller.

  E:An electric freezer can operate efficiently only if chilled air is free to circulate within the freezing compartment.

  最佳解析:本题目的为解释为什么“半空的电冰箱比全满的电冰箱更消耗能量”。显然本题涉及的是energy的多少,则energy是关键词。半空的电冰箱中是空气,而全满相对而言空气较少,(A)抓住了这一区别解释了现象,说明空气维持在冰点以下比食品更消耗能量。所以(A)is correct。(B)无法说明为什么半空更消耗能量。(C)和(E)仅仅说明电冰箱运作时的一些情况。(D)虽然涉及了半空的电冰箱,它只是得出一个节约能量的方法,没有解释上面所说的为什么半空更消耗能量

  答案:A

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