Prep-43(33475-!-item-!-188;#058&006874)

答案是B (make a difference没有方向,怎么就加强了呢)

43.   (33475-!-item-!-188;#058&006874)

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?

 (Evidence1:以前的两部法,Evidence2:现在用一步法,比老办法贵 结论:用新办法你老办法好,好在长期经济实惠)

(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.(老涂层和新涂层比使飞机的承重能力不同-又没说怎么不同是好了还是坏了,怎么也看不出跟airline's long-term economic interest to purchase 有啥关系)

(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.

 make a difference to that airliner's load-bearing capacity

关键就在这里，这个差异就是造成经济利益不同的原因。涂层重，占了飞机过多载重分量，可以运输的货物或载的人少了，赚得钱不是就少了嘛。这个道理。