• 2022-06-03
    设[img=589x150]1803110b52ea08c.jpg[/img],则[img=132x25]1803110b5ba8516.png[/img]的波形图为( )。
    A: [img=403x344]1803110b6603561.jpg[/img]
    B: [img=403x344]1803110b70a31f7.jpg[/img]
    C: [img=403x346]1803110b7b45693.jpg[/img]
    D: [img=408x347]1803110b85e8273.jpg[/img]
  • 举一反三