键盘属于输入设备还是输出设备?拜托各位大神
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punched paper tape
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touch screen
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magnetic card reader
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teletypewriter
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track ball
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light pen
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(optical mark reader,OMR
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optical character reader,OCR
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Hanzi input device
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keyboard
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interactive input device
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card reader
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joystick
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scanner
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mouse
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input device
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digitizer
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bar code reader
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print head
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teletypewriter
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non-impact printer
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plotter
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monitor
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impact printer
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output device
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display controller
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display
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display adapter
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printing device
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speech output device
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