单项选择题

（） is permanently stored in the computer and provides a link between the hardware and other programs that run on the PC.

A．Interface　
B．Operating system
C．Internet
D．Application software

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单项选择题
A （）copies a photograph, drawing or page of text into the computer.

A．scanner
B．printer　
C．display
D．keyboard
单项选择题
The（）controls the cursor or pointer on the screen and allows the user to access commands by pointing and clicking.

A．graphics
B．printer
C．program
D．mouse
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