56.已知LTI系统方程为r() 3-r() 2r(t)=20() 33(t) u(t),r(0 )=3,则 56.已知LTI系统方程为r() 3-r() 2r(t)=20() 33(t) u(t),r(0 )=3,则 发布时间:2025-03-02 19:40:08