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问题 单项选择题

E1信道的数据速率是______，其中每个话音信道的数据速率是______。

A．1.544Mbps

B．2.048Mbps

C．6.312Mbps

D．44.736Mbps

答案

参考答案：B

填空题

用所给单词的适当形式填空。

1. I love places where the people are really _____ (friend).

2. I want to go there, because I like _____ (excite) vacations.

3. Could you please _____ (give) me some _____ (suggest)for vacation spots?

4. Would you like _____ (drink) some orange juice?

5. You look tired, why not _____ (have) a short rest?

6. His brother is considering _____ (study) abroad.

7. Do you plan on _____ (stay) overnight here?

8. Most private cars _____ (not allow) in downtown Singapore.

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单项选择题

测取示功图时，下列做法不正确的是：（）。

A.安装示功器前要打开示功阀吹出其中积炭

B.要画出大气压力线

C.为使示功图清楚针尖应在示功图纸上多画几个循环

D.测完示功图应在图纸上标记缸号
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