• 2022-06-19
    1. 题1图所示的4个信号,哪个信号是确定性的连续时间能量信号( )‎‎
    A: [img=528x211]1802d50032620d7.png[/img]
    B: [img=523x206]1802d5003d06e14.png[/img]
    C: [img=535x201]1802d5004862052.png[/img]
    D: [img=509x203]1802d50052cc154.png[/img]