问题
单项选择题
(71 ) is the sending and receiving of the messages by computer. It is a fast, low-cost way of communicating worldwide.
A．LAN
B．Post office
C．E-Mail
D．Interface
答案
参考答案：C
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(71 ) is the sending and receiving of the messages by computer. It is a fast, low-cost way of communicating worldwide.
A．LAN
B．Post office
C．E-Mail
D．Interface
参考答案：C