当两个被连接件之一太厚，不宜制成通孔，且不需要经常拆卸时，往往采用( ) A．螺栓

成语“草木皆兵”和“风声鹤唳”出自于[ ]

A．官渡之战

B．赤壁之战

C．淝水之战

D．长平之战

Only in this way       get rid of this bad habit and I believe only     persuade him .

A．you can; you can

B．can you; can you

C．you can; can you

D．can you; you can

It has been announced recently that all the schools in our country ______ not have students attend school at weekends.[ ]

A. need  

B. may  

C. could  

D. shall

价格是由外贸业务员确定的，跟单员不需要进行价格确认。

不属于戒断综合征一般表现的是

A．幻觉或错觉

B．情绪改变

C．判断力增强

D．人格改变

E．失眠