比较题求助

vichain · 发表于 2011-8-6 10:11:05

American productivity is declining in relation to Europe's; the energy expended per unit of production in the United States is................
as much as twice that expended in West Germany
as much as twice that of West Germany's expenditure
为什么选第一个？

Tobelogical · 发表于 2011-8-6 10:29:58

平行性～

比较题求助

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