单项选择题

Electronic commerce refers to business activities conducted using electronic data transmission via( ).

A．the Internet and World Wide Web
B．telephone
C．magazine
D．newspaper
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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
单项选择题
( )occurs when one business transmits computer-readable data in a standard format to another business.
A．EFT
B．VAN
C．EDI
D．WAN
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