悬架一般由（）、（）和（）三部分组成，它们的作用分别是（）、（）和（）。
参考答案：弹性元件；减振器；导向机构；缓冲；减振；导向
用括号内所给词的适当形式填空。
1．Two minutes ago, the woman _________ (ask).
2．It's your turn _________ (give) a talk now.
3．She _________ (hurt) her leg when she fell off her bike.
4．Last term, he _________ (start) _________ (teach) himself English.
5．I like talking to people and _________ (write) stories.
电石库周围( )m以内不得有明火。
A．5
B．7
C．9
D．10
