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【单选题】
按键开关的结构通常是机械弹性元件，在按键按下和断开时，触点在闭合和断开瞬间会产生接触不稳定，为消除抖动引起的不良后果常采用的方法有
A.
硬件去抖动
B.
软件去抖动
C.
硬件、软件两种去抖动方法
D.
单稳态电路去抖动方法
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