You_______that mistake；you were too care_爱下问搜题

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问题选择题

You_______that mistake；you were too careless．

A．should not make

B．should not have made

C．ought not have made

D．must not have made

答案

B

单项选择题

日常生活中照明电路的接法为（）。

A.星形四线制；

B.星形三线制；

C.三角形三线制；

D.可以是三线制，也可以是四线制。

问答题简答题

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