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Motherboard is the main curcuit board outside the PC. It holds the CPU, and the memory program, to perform the basic arithmetical, logical, and input/output operations.
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Monitor is an output device that is used to display the information on the screen.
Generally a mouse has three buttons left and right to perform different functions and a small wheel between the two mouse buttons.
羽毛球发球按球在空中飞行的弧线可分为高远球、平高球、平快球和网前球等。
在一场ABC对XYZ的团体比赛中，第一场比赛B因非法指导A而受到警告，第二场A对B进行非法指导。裁判员应：
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