选择题：●Communication protocols are (66) connection－oriented or connectionless, (67) whether the

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题目内容：
●Communication protocols are (66) connection-oriented or connectionless， (67) whether the sender of a message needs to contact and maintain a dialog with the recipient or (68) send a message without any prior connect and with the hope that the recipient receives everything (69) .These methods

(70) the two ways that communication is implemented on networks.

(66) A．not

B．neither

C．either

D．all

(67) A．fulled

B．flooded

C．depending on

D．defined by

(68) A．immediately

B．simply

C．accordingly

D．properly

(69) A．in order

B．in array

C．in series

D．in queueing

(70) A．make known

B．disclose

C．reveal

D．discover




参考答案：

●One use of networks is to let several computers share (71) such as file systems,printers,

●One use of networks is to let several computers share (71) such as file systems,printers,

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● 计算机各部件之间传输信息的公共通路称为总线, 一次传输信息的位数通常称为总线的 (14) 。(14)A

● 计算机各部件之间传输信息的公共通路称为总线, 一次传输信息的位数通常称为总线的 (14) 。(14)A

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●A computer virus is a computer program that is created to make and spread (72) of itself.

●A computer virus is a computer program that is created to make and spread (72) of itself.

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●The Programming languages are designed to (73) the communication between human and comput

●The Programming languages are designed to (73) the communication between human and comput

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●There is free firewall software available that can run on minimal hardware and provide a

●There is free firewall software available that can run on minimal hardware and provide a

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