题目内容

_______-input devices convert sounds into a form that can be processed by the system unit.

A. Electrolyzing
B. Plotting
C. Webcam
D. Audio

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The most widely used audio-input device is the _______.

A. Webcam
B. radio frequency card reader
C. microphone
D. stylus

The series of dots that form the image on a monitor are called _______.

A. picas
B. bits
C. pixels
D. bytes

This indicates the monitor's ability to display colors by comparing the light intensity of the brightest white to the darkest black.

A. Contrast ratio
B. Dot Pitch
C. Active display area
D. Resolution

The distance between each pixel.

A. Dot pitch
B. Refresh rate
C. Resolution
D. Word size