老题新问PREP 07 43纠结很久的，实在理解不了答案

月谪仙

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

答案选B 我在BE中纠结。主要是题目说原来喷漆有两个步骤，一个prime，一个top coat，而新技术可以不用prime而用两层新coat来代替，这里我不明白新技术究竟是不用prime也不用旧的top coat只用两层新coating还是说只是把prime用两层新coating代替了，top coat还是要用的···因为原文是A new process requires no primer, but instead uses two layers of the same newly developed coating，所以我偏向还是要用top coat的，那这样B中就出现问题，因为B 比的是一层新coating和prime而不是两层，所以应该是不能选的···同时E因为可以共用equipment就不用买新的，不是也是节约了钱么？？求助各位大牛为什么应该理解成是prime和top coat 一起被两层新coating替代了？究竟原文那里有这个意思在呢？？无比感谢啊！！！

HarrisZheng

E没有节约钱吧 不管要不要买新设备 新技术本身是比老技术贵的

B 从另一个方面来解释 尽管喷漆这方便新技术贵 但是新技术使飞机变轻 从而可以多装东西/人

补充一下 旧技术：一层prime然后一层coat  
               新技术： 直接两层coat

月谪仙

谢谢楼上回复~现在不选E我明白了···但是还是不懂为什么新技术可以理解成就是两层coat 文中instead of的不是prime么？求指导！！！！

月谪仙

UP UP 求解释一下啊···始终看不懂为什么是两层coat···明明说的是 requires no primer, but instead uses two layers of the same newly developed coating，难道instead的内容不是primer而是prime和top coat？？为什么呢？？？

crazyanswer

instead use ... 的主语是A new process, 所以与之对应的是old process

hlhlhlt

这题开始我也选了E，我觉得楼主把问题领会错了，an airline's long-term economic interest to purchase，问题问的是航空公司出于长期经济效益考虑为毛要买新技术喷刷的飞机？E是说飞机生产商

题目的意思是以前飞机刷两遍漆，a coat of primer （A）, and then a top coat（B）。现在新方法是不涂A+B，涂C*2遍，每个C重量=B，注意这里没有A了，隐含的条件就是AB重量有差，继而AC重量有差。

正确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。
A重量>C，这个差大到影响airliner的运载力了，继而直接关系航空公司的经济效益blabla

大盆Daniel

hlhlhlt 发表于 2012-11-1 12:47
这题开始我也选了E，我觉得楼主把问题领会错了，an airline's long-term economic interest to purchase， ...

其他都看懂了，就是隐含的AB质量有差还是没有理解。能再解释下吗？谢谢！

edifier1990

哪位大神能给我分析一下B选项的句子结构，感觉一个句子有两个谓语了，weighs和would，。。。疑惑啊

江北一散人

hlhlhlt 发表于 2012-11-1 12:47
这题开始我也选了E，我觉得楼主把问题领会错了，an airline's long-term economic interest to purchase， ...

"with each layer of the new coating having the same thickness and weight as a traditional top coat",这里说新涂层是两块一样重，且和传统表面的外漆一样重，也就意味着原来的底漆和外漆不一样重，你可以这么想，要是原来的底漆外漆一样重，为什么不说weight as the traditional primer and the traditional top coat呢？为什么要特意强调“having the same thickness”呢？