______ is the sending and receiving of the messages by computer. It is a fast, low-cost way of communicating worldwide.A．LANB．Post officeC．E-MailD．I-dimension array
______ 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．I-dimension array
相关考题：
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下面的命令可以实现只能往/var/log/messages里面追加数据，但不能删除的功能。 chattr +a /var/log/messages