数字中继接口包括A接口和B接口。其中B接口是PCM二次群接口，其接

搜题请搜索小程序“爱下问搜题”

问题单项选择题

数字中继接口包括A接口和B接口。其中B接口是PCM二次群接口，其接口速率为（）。

A.128kb/s

B.64kb/s

C.2048kb/s

D.8448kb/s

答案

参考答案：D

填空题

单词拼写

1. She (提醒)__________me that I hadn't written to mother.

2. We have (相似的)__________experiences, but your end result is quite different.

3. Liu Huan is a (著名的)___________singer.

4. The (运输)__________of goods by air is very expensive.

5. There is no such car in the (环境)____________area.

6. As is known, it takes years to (掌握)___________a new language.

7. Why is the driver (闪光)_____________his lights at me?

8. The flowers died for (缺乏)____________of water.

9. Everyone who enters the chemical factory must wear a (面具)___________.

10. His head (疼)______________, which stopped him from going to the party.

单项选择题 A1/A2型题

关于健康教育的目的，不正确的是（）

A.预防疾病

B.促进健康

C.提高生活质量

D.传播健康信息

E.消除影响健康的危险因素