汇川伺服与台达哪个好:英语选择题

来源:百度文库 编辑:神马品牌网 时间:2024/05/10 06:23:08
Everyone has to work very carefully because there ( ) any mistakes in it .
A.must not be B.must not have
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应该选A!
因为是there be 句型!
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B

B