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问题 问答题 简答题

请简述ISUP消息与SIP消息之间的映射关系。

答案

参考答案：

I.AM=INVITE

A.CM=180RINGING

A.NM=200OK

R.EL=BYE

R.LC=200OK

填空题

用适当的介词或副词填空。

1. Though Zhang Guoli is a bit ill, he goes to work instead ______ staying at home.

2. The parents allowed their children to stay ______for their favorite program.

3. It is necessary to clean______ your desk every day.

4. —Mom, I think I'm well enough to go back to school.

    —Not really, my dear. You'd better stay ______ home for another day.

5. I think teenagers should be allowed to go______ with their friends on weekends.
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单项选择题

对三国鼎立到隋朝重新统一全国这段历史时期的政局，叙述正确的是( )。 ①只有西晋有过短暂的统一 ②大多数时间是多个 * * 分立、南北对峙的复杂政局 ③西晋、北魏、东晋都有过短暂的统一 ④除三国分立以外，其他时间基本上处于统一状态

A．①②③

B．①②

C．②③④

D．①③④
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