Paint on a new airliner is usually applied in two stages: first, a coat of primer, and then a top coat. A new process requires no primer, but instead uses two layers of the same newly developed coating, with each layer of the new coating having the same thickness and weight as a traditional top coat. Using the new process instead of the old process increases the price of a new aircraft considerably. Which of the following, if true, most strongly indicates that it is in an airline's long-term economic interest to purchase new airliners painted using the new process rather than the old process? (A) Although most new airliners are still painted using the old process, aircraft manufacturers now offer a purchaser of any new airliner the option of having it painted using the new process instead. (B) A layer of primer on an airliner weighs more than a layer of the new coating would by an amount large enough to make a difference to that airliner's load-bearing capacity. (C) A single layer of the new coating provides the aluminum skin of the airliner with less protection against corrosion than does a layer of primer of the usual thickness. (D) Unlike the old process, the new process was originally invented for use on spacecraft, which are subject to extremes of temperature to which airliners are never exposed. (E) Because the new coating has a viscosity similar to that of a traditional top coat, aircraft manufacturers can apply it using the same equipment as is used for a traditional top coat. 答案是B 请问为什么是B啊？B不是直接削弱了原题条件：面漆和底漆一样重吗？这样也可以？ -- by 会员 didosun72 (2010/5/8 11:07:37)
Paint on a new airliner is usually applied in two stages: first, a coat of primer, and then a top coat. A new process requires no primer, but instead uses two layers of the same newly developed coating, with each layer of the new coating having the same thickness and weight as a traditional top coat. Using the new process instead of the old process increases the price of a new aircraft considerably.
（原文最后一句的意思是用新方法代替旧方法增加了新的飞机的价格）
Which of the following, if true, most strongly indicates that it is in an airline's long-term economic interest to purchase new airliners painted using the new process rather than the old process?
（问题问的是哪一个支持飞机的长期的经济利益去用新方法而不是旧方法）
(A) Although most new airliners are still painted using the old process, aircraft manufacturers now offer a purchaser of any new airliner the option of having it painted using the new process instead.
（A所讨论的问题是虽然新航班仍用旧方法，但制造商让新飞机的购买者购买新方法作为替换，简单的说就是说的是制造商让购买者做什么这方面的问题，但是制造商让购买者用新方法不一定新方法就能有经济利益，所以A不能让我们相信飞机的长期的经济利益去用新方法而不是旧方法，扔掉。）
(B) A layer of primer on an airliner weighs more than a layer of the new coating would by an amount large enough to make a difference to that airliner's load-bearing capacity.
（B所讨论的问题是一层的primer比一层的new coating重，会对航班的载重产生不同这方面的问题，简单的说B就是说旧方法的primer没有新方法的new coating好，并且会对航班的重量有影响。与A,C,D,E将比，将B代入原文后起码让我们能够相信一些：飞机的长期的经济利益是用新方法而不是旧方法这点。所以就只能选B了）
(C) A single layer of the new coating provides the aluminum skin of the airliner with less protection against corrosion than does a layer of primer of the usual thickness.
（C所讨论的问题是单层的新的coating比一层的primer对于皮肤的保护少这方面的问题，简单的说就是new coating比原来旧方法的primer在哪儿不好的问题，但原文是支持用新方法，且新方法比旧方法能带来经济利益的，所以C扔掉）
(D) Unlike the old process, the new process was originally invented for use on spacecraft, which are subject to extremes of temperature to which airliners are never exposed.
（D所讨论的问题是新的方法原来是做什么用的这方面的问题，原文没有说过，扔掉）
(E) Because the new coating has a viscosity similar to that of a traditional top coat, aircraft manufacturers can apply it using the same equipment as is used for a traditional top coat.
（E所讨论的问题是新方法和旧方法的v是一样的，所以用新方法和用旧方法一样这方面的问题。将E代入原文后没有增加旁观者对于：支持飞机的长期的经济利益去用新方法而不是旧方法的相信概率，所以E扔掉）
亲这道题我开始也做错了，后来是看着prep中的正确答案解释的。如果解释的不好请你见谅，实在能力有限。呵呵~
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发表于 2010-5-8 11:07:37
楼主
3q！！
多谢楼主