搜题请搜索小程序“爱下问搜题”
问题 选择题

单项选择。

A: What are you doing?             

B: We are making            cake.[ ]

A. a                 

B. an                  

C. the                

D. /

答案

答案：A

单项选择题

从所给的四个选项中，选择最合适的一个填入问号处，使之呈现一定的规律性（）

 

A．

B．

C．

D．
查看答案
单项选择题

A transport layer protocol has several responsibilities, One is to create a process-to-process (program-to-program) communication; TCP uses port （1） to accomplish this. Anotherresponsibility of a transport layer protocol is to create a（2）and error-control mechanism atthe transport level. TCP uses a sliding（3）protocol to achieve flow control. It uses theacknowledgment packet, time-out, and retransmission to achieve （4） control. The transportlayer is also responsible for providing a connection mechanism for the application program. Theapplication program sends （5）of data to the transport layer. It is the responsibility of thetransport layer at the sending station to make a connection with the receiver.

（1）是（）

A.numbers

B.connection

C.diagrams

D.resources
查看答案