5.已知信号f(t)的傅里叶变换F(ja)=u(x ay)-u(-),则f(t)为A Se(C 2u Sa(as t)D Za Sa
5.已知信号f(t)的傅里叶变换F(ja)=u(x ay)-u(-),则f(t)为A Se(C 2u Sa(as t)D Za Sa
发布时间：2025-11-22 18:38:05
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