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daier · 发表于 2010-8-5 09:46:48

Q40. p1-cr43.(33475-!-item-!-188;#058&006874)

Paint on a new airliner is usually applied in two stages:first, a coat of primer（底漆）, 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?

(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.

答案：B
B我看不懂啊，谁能解释一下啊

daier · 发表于 2010-8-5 14:47:01

顶起来

小伊YSY · 发表于 2010-8-12 02:02:51

up！

phoenix89 · 发表于 2010-8-12 02:23:19

(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.

旧的（A layer of primer）要比新的（a layer of the new coating ）重，（若换成新的），差额的这部分可以增加客机的载客量。

载客量大了，收入增多，长期效益就出来了：）

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