题目内容

保单退保,保费应退还给

A. 被保险人
B. 投保人
C. 受益人

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螺纹梳刀适合加工大批量螺纹一次走刀完毕。

A. 对
B. 错

Without electronic computers, much of today's advanced technology _______.

A. haven't been achieved
B. wouldn't be achieved
C. hadn't been achieved
D. wouldn't have been achieved

Jane said to her husband, "Don't worry. There is no cause for ________ about our daughter's ability to manage herself."

A. care
B. concern
C. attention
D. love

The tap won't ________, and there is water all over the floor.

A. turn off
B. turn down
C. turn on
D. turn up

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