This book is a bit difficult. ________ read something easier?
A.
Why not to
B.
Why don’t
C.
Why not
D.
Why not you
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
皮皮学刷刷变学霸
举一反三
【单选题】A pulse is applied to each input of a 2-input NOR gate. One pulse goes HIGH at t=0 and goes back LOW at t=1ms. The other pulse goes HIGH at t=0.8ms and goes back LOW at t=3ms. The output pulse can be ...
A.
It goes LOW at t=0 and back HIGH at t=3ms. 该脉冲在 t=0ms 降为低电平, t=3ms 时返回高电平。
B.
It goes LOW at t=0.8ms and back HIGH at t=3ms. 该脉冲在 t=0.8ms 降为低电平, t=3ms 时返回高电平。
C.
It goes LOW at t=0.8ms and back HIGH at t=1ms. 该脉冲在 t=0.8ms 降为低电平, t=1ms 时返回高电平。
D.
It goes HIGH at t=0.8ms and back LOW at t=1ms. 该脉冲在 t=0.8ms 升为高电平, t=1ms 时返回低电平。