【单选题】已知信号x(t)=u(t+1)-u(t-1),则x(-2t-1)为 A. u(t)-u(t-4) B. u(t+4)-u(t) C. u(t+1)-u(t) D. u(t)-u(t-1)
【单选题】已知信号x(t)=u(t+1)-u(t-1),则x(-2t-1)为
A、 u(t)-u(t-4)
B、 u(t+4)-u(t)
C、 u(t+1)-u(t)
D、 u(t)-u(t-1)
发布时间：2025-08-18 19:47:43
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答案：u(t+1)-u(t)
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