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●In recent years,TCP／IP has also begun to be used by telephone companies to provide faster

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●In recent years，TCP／IP has also begun to be used by telephone companies to provide faster,cheaper telephone (74) .

(74) A．transmitting

B．transmited

C．transfers

D．transmissions

参考答案:

D【解析】最近几年，TCP／IP已经被电信公司使用为用户提供更快速、更廉价的电话通信。

相关问题:

● (74) is used to communicate with another computer over telephon

A(71)is used to communicate with another computer over telephone l

In most WANs, the network contains numerous cables or telephone li

Circuit-switchingtechnologyisusedinPublishSwitchedTelephoneNetwork

A（）isusedtocommunicatewithanothercomputerovertelephonelines.

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