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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单项选择题
()computer is a personal computer whose hardware is capable of using any or all 0f the following media in a program:audio,text,graphics,video and animation.

A.database
B.multimedia
C.network
D.mainframes

单项选择题
在局域网模型中,数据链路层分为()

A.逻辑链路控制子层和网络子层
B.逻辑链路控制子层和媒体访问控制子层
C.网络接口访问控制子层和媒体访问控制子层
D.逻辑链路控制子层和网络接口访问控制子层

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