You should never base anything on a theory that _________ impractical in practice._刷题宝

题干

You should never base anything on a theory that _________ impractical in practice.

A：is proved

B：prove

C：prove

D：proved

上一题下一题 0.0难度选择题更新时间:2017-03-02 10:07:01

答案(点此获取答案解析）

C

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\frac{1}{2018}

的相反数为（）

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