判断题
错误(↓↓↓ 点击‘点击查看答案’看答案解析 ↓↓↓)
A.下降沿 B.低电平 C.负脉冲 D.正脉冲
A.10111100B B.11110100B C.11111100B D.11110111B
A.0011011B B.11011000B C.10011100B D.10011000B
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