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问题 选择题

—Can you act out this play in English?

—_______ It's too hard. [ ]

A. Yes, I can sing

B. No, I can't

C. No, I don't

D. Yes, I do

答案

答案：B

填空题

钩吻中毒可见______、______、______进行洗胃。
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单项选择题 共用题干题

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. Another responsibility of a transport layer protocol is to create a  (2) and error-control mechanism at the transport level. TCP uses a sliding (3) protocol to achieve flow control. It uses the acknowledgment packet, time-out, and retransmission to achieve  (4) control. The transport layer is also responsible for providing a connection mechanism for the application program. The application program sends  (5) of data to the transport layer. It is the responsibility of the transport layer at the sending station to make a connection with the receiver.

空白（4）处应选择（）

A.packet

B.time

C.error

D.phase
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