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问题 单项选择题

电动型主机遥控系统重起动的逻辑条件是（）。

①应急起动；

②倒车起动；

③第三次起动；

④换向过程中的起动；

⑤停车时间过长的起动；

⑥重复起动。

A.①②⑤

B.①③④

C.①③⑥

D.①④⑤

答案

参考答案：B

填空题

用所给词的适当形式填空。

1. It's very nice of you _____ (invite) me to the party.

2. It's cold outside. You'd better _____ (not take) off your coat.

3. He was pleased _____ (receive) the present.

4. How many _____ (act)in this play all together?

5. At last we decided _____ (set) off at once.

6. What we have to do first is _____ (find) a solution.

7. Let me _____ (do) it for you.

8. We must try _____ (live) together happily.

9. _____ you _____ (impress) by the play?

10. I think it's hard _____ (get) to the top of the high Mountain.
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问答题 简答题

测定尿比密有些什么方法?
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