●In recent years,TCP／IP has also begun to be used by telephone companies to prov
●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
正確答案：D【解析】最近幾年，TCP／IP已經(jīng)被電信公司使用為用戶提供更快速、更廉價(jià)的電話通信。
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