被联接机件不太厚,并能从联接两边进行装配时,可采用()联接。
A.螺栓
B.双头螺柱
C.螺钉
参考答案:A
— Where did Jim go yesterday?
— He ______ Guanzhou, but now he ______ back home. [ ]
A. goes to, has gone
B. went to, has been
C. has gone to, went
回顾历史,我们两国经济和文化的交流已经______了一千多年。 填入划横线部分最恰当的一项是( )。
A.联系
B.继续
C.延续
D.连续