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英语
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Computers can do a great deal of work in a short time,but a man can not do much by himself 这里为什
么要用computers 而不用computer，区别在哪里？
人气：283 ℃ 时间：2019-10-17 08:37:15
解答
恩,是泛指 要么用 a computer 要么用 computers 这种一般名词的单数一般是不能单独出现的,要么加个冠词 要么就用复数
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