• 2022-06-27
    电路如图所示,激励为f(t),响应为y(t),则系统的单位阶跃响应为_____。[img=279x105]18034efa136bd81.png[/img]
    A: cos(t)u(t)
    B: cos(2t)u(t)
    C: sin(2t)u(t)
    D: sin(t)u(t)