题目内容

既是输入设备又是输出设备的是()。

A.磁盘驱动器
B.键盘
C.扫描仪
D.鼠标

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显示器的分辨率640*480的含义是:屏幕上有()条扫描线,每条线包含( )个点。

RGB三原色分别是指()三种颜色。

25. These devices are capable ________ performing a wide variety of tasks.

A. in
B. of
C. for
D. with

26. Many experts believe that the Internet of Things will ________ the next industrial revolution.

A. give off
B. turn on
C. bring about
D. send for

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