单项选择题

（） The character code built into most modern personal computers.

A．ASCII
B．internet
C．interface
D．Windows

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单项选择题

（） A series of instructions(commands) performed in a sequence specifying actions to accomplish a task.

A．menu
B．tool
C．program
D．run

单项选择题

（） Messages that are sent electronically over a network.

A．input
B．output
C．data
D．E-Mail

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