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【题目】Nowadays computers _______ process difficult problems very quickly.

A.mustB.canC.needD.should

【答案】B

【解析】

句意:如今,计算机可以很快地处理困难的问题。

考查情态动词辨析。must必须,表示义务;can可以,表示能力;need需要,表示要求;should应该,表示义务,根据句意,这里表示计算机能很快地处理困难的问题,表示能力,故选B

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