Many Americans eat ________ as they actu...

Many Americans eat ________ as they actually need every day.

A. twice as much protein (蛋白质) B. twice protein as much

C. protein as much twice D. protein as twice much

A 【解析】试题分析：考查倍数的用法。句意：许多所摄入的蛋白质是他们所需要的二倍。倍数词＋as…as意为“是……多少倍”，故选A项。考点 : 考查倍数的用法

考点分析：

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