单项选择题

One of the greatest features of a home ______ is the ability to share one Internet connection simultaneously over two or more computers.

A．computer
B．device
C．network
D．work
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单项选择题
A ______ consists of the symbols, characters, and usage rules that permit people to communicate with computer.
A．programming language
B．network
C．keyboard
D．display
单项选择题
______ software, also called end-user program, includes database programs, word processors, spreadsheets etc.
A．Application
B．System
C．Compiler
D．Utility
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