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地板

楼主 |
发表于 2010-10-23 13:58:49
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谢谢LS的两位大侠~~~懂了~~~~~~~~~~~~
还有一个题请教大家~
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?
(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. 【之说了difference,怎么说就primer不好呢?这句话都没咋看懂的说】 |
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