• 2022-06-17
    13.已知信号x[k]的波形如题13图所示,下列表达式中错误的是( )[img=587x308]18035b0c7a32e3e.png[/img]
    A: (A)[img=140x25]18035b0c827fbac.png[/img]
    B: (B)[img=140x25]18035b0c8b9cdd3.png[/img]
    C: (C)[img=327x25]18035b0c94ad93c.png[/img]
    D: [img=401x25]18035b0c9e1da61.png[/img]
  • 举一反三