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问题 单项选择题

镗削薄壁工件时，在粗镗以后，精镗以前要使工件充分变形后再重新夹紧、重新校正（），以防精镗后工件变形。

A.定位基准面

B.夹紧工件的夹紧点

C.原始坐标基准点

D.粗镗时各找正基准点

答案

参考答案：C

单项选择题

急性头痛的病程常在

A．2周内

B．3个月内

C．1年

D．大于3个月

E．半个月
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听力题

词汇。

小题1:There is an ______ of oil paintings in the museum. (exhibit)

小题2:It often ________(吸收) power from others.

小题3:Robots can help Mum do the _______(干洗衣服) when there are dirty clothes.

小题4:The robot has three long arms ________(连接) to its chest.

小题5:For a moment he was completely ______ (knock) over by the news of his friend’s death.

小题6:Before I got home yesterday, my shirt _______ (iron) by my wife.

小题7:The contribution that Einstein made to modern physics is _______(独一无二的).

小题8:The machine is ________ (旋转) out of control.

小题9:Now Daniel’s father is one of the youngest ________ (教授) in his university.

小题10:There was only one girl __________ (服务) customers.
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