在OSI七层结构模型中,处于数据链路层与运输层之间的是()
A、物理层
B、网络层
C、会话层
D、表示层
参考答案:B
在OSI七层结构模型中,处于数据链路层与运输层之间的是()
A、物理层
B、网络层
C、会话层
D、表示层
参考答案:B
A. She's reading.
B. She's drawing.
C. She's writing.
D. She's seeing.
3. What does Mrs. Li want to look at?[ ]
A. Story book.
B. Li Ming' s pen.
C. A bike.
D. A letter.
4. Does Li Ming give the story book to Mrs. Li?[ ]
A. Yes, he does.
B. No, he doesn't.
C. Yes, he is.
D. No, he isn't.
5. Is Jenny in this dialogue (对话)?[ ]
A. Yes, she is.
B. Yes, she does.
C. No, she isn't.
D. No, she can't.