• 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]18036c2ccc4a925.png[/img]
    A: (A)[img=140x25]18036c2cd539a28.png[/img]
    B: (B)[img=140x25]18036c2cdde2da2.png[/img]
    C: (C)[img=327x25]18036c2ce5f84af.png[/img]
    D: [img=401x25]18036c2cee22dd1.png[/img]
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      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]18038d24b77fdf6.png[/img] A: (A)[img=140x25]18038d24bf90fff.png[/img] B: (B)[img=140x25]18038d24c6fddbb.png[/img] C: (C)[img=327x25]18038d24cf6aaba.png[/img] D: [img=401x25]18038d24dc559d5.png[/img]

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      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]180361a788adaf5.png[/img] A: (A)[img=140x25]180361a790ffde4.png[/img] B: (B)[img=140x25]180361a7986efc0.png[/img] C: (C)[img=327x25]180361a7a5b35bb.png[/img] D: [img=401x25]180361a7b35e65c.png[/img]

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      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]18038c00d503d66.png[/img] A: (A)[img=140x25]18038c00dda99e1.png[/img] B: (B)[img=140x25]18038c00e5e9c26.png[/img] C: (C)[img=327x25]18038c00f23a539.png[/img] D: [img=401x25]18038c00fa8e92a.png[/img]

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      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]18038322a57456d.png[/img] A: (A)[img=140x25]18038322aea0a99.png[/img] B: (B)[img=140x25]18038322b883625.png[/img] C: (C)[img=327x25]18038322c119b6e.png[/img] D: [img=401x25]18038322caef450.png[/img]

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      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]1803879c3bb1136.png[/img] A: (A)[img=140x25]1803879c43c2098.png[/img] B: (B)[img=140x25]1803879c4bd2f08.png[/img] C: (C)[img=327x25]1803879c55bd1a4.png[/img] D: [img=401x25]1803879c655b982.png[/img]