单项选择题

In C language，one method of communicating data between functions is by______。

A．arguments
B．variables
C．messages
D．constants
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单项选择题
C++fully supports______programming.
A．visual
B．object-oriented
C．logic
D．natural language
单项选择题
______is a device that converts images to digital format.
A．Copier
B．Printer
C．Scanner
D．Display
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