A-A+
In recent years TCP/IP has also begun to be u
问题详情
In recent years, TCP/IP has also begun to be used by telephone companies to provide faster, cheaper telephone(67)
A．transmitting
B．transmited
C．transfers
D．transmissions请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：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。
