• 2022-07-26
    2. 单位脉冲函数[img=29x25]180351c81bee0bb.png[/img]的拉普拉斯变换为()
    A: 1
    B: [img=9x43]180351c824bca3f.png[/img]
    C: [img=16x43]180351c82c6fd09.png[/img]
    D: [img=32x44]180351c83559352.png[/img]