对话配对。  根据A 栏内容在B 栏选择正确的答案或组成意思连贯的句子。

A

(       ) 1. How much is the white T-shirt?

(       ) 2. It's a very successful thriller.

(       ) 3. Does she want to go to movies?

(       ) 4. How old is she?

(       ) 5. What can I do for you?

(       ) 6. What kind of movies do you like?

(       ) 7. Who likes Cartoons best?

(       ) 8. When is your cousin's birthday?

B

A. She's 13.

B. I like thrillers.

C. It's Sep. 21st.

D. My brother does.

E. It's $ 12.

F. but I think it's boring.

G. Yes, please. I need a black bag.

H. No, she doesn't.

以下关于X.25网络的描述中，正确的是______。

A．25的网络层提供无连接的服务

B．25网络丢失帧时，通过检查帧顺序号重传丢失帧

C．25网络使用LAP-D作为传输控制协议

D．25网络采用多路复用技术，帧中的各个时槽被预先分配给不同的终端