问题
单项选择题
specifies the format of a mail message and describes how mail is to be administered on the E-mail server and transmitted on the Internet.
A．FTP
B．SMTP
C．POP
D．IMAP
答案
参考答案：B
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specifies the format of a mail message and describes how mail is to be administered on the E-mail server and transmitted on the Internet.
A．FTP
B．SMTP
C．POP
D．IMAP
参考答案：B