• 2022-05-28
    下列分布函数性质的叙述中错误的是( )
    A: 是右连续函数,即;
    B: 对任意一个实数,都有.
    C: ,;
    D: 单调非减函数;
  • B

    举一反三

    内容

    • 0

      试求序列<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/cb5683e4401b464bb94af075183c06d2.png" />的双边z变换及其收敛域( ) A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/07475602a8b04ef18fe697ba033d87cc.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/9d0ea6592c7d45a28bb6dac86e53ca52.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/d594b5541bf8465d9eca5af4a3b38545.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/ddd3f7717f134d54a0e27eef90e3b930.png" />

    • 1

      求序列<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/5131160157fe4bc7bd53878104ffd1cd.png" />的DTFT为( ) A: 不存在 B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/e521d6f23d234b38b3ad34622a74b1b2.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/fbec0bedcb3c47a8825ec337b818764f.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/5fc107dac73e4c00afcf8f1701f80a47.png" />

    • 2

      已知信号<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/dd73dc4df2f24b0780af6a97fdf8a562.png" />的奈奎斯特角频率为<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/a43212a9536a46ac8a20c6dc7d78906d.png" />,则信号<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/1821f6e23ad74b4ca7d8fb212ee4dada.png" />的奈奎斯特角频率为( )。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/9eb48130d0e24c1c8234e1de4c730c0f.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/db0c7b373ae04e0599630a5086233c04.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/353ea3d067db4076977d456717aa82d2.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/6d550ebc083244648d78d5b2c334dfce.png" />

    • 3

      下列表达正确的热力学方程有( )。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/4e8abe7a4904459cb6994188d5d122af.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/434c7862e21a4543b52489df5d34f858.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/081b9e9ece6a4bc49c1950b4e28cf479.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/91785cd2f0d04bddb91adb687ce55f2a.png" />

    • 4

      梅森公式的正确表达形式为( )。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/32780db6b4c34c3597992c3b7abf0732.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/5cc2dc9acb204d79a246fd1b76b4a91b.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/bf8a7fc9338f4d19b481d8b3334c37f6.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/0ffb1fb6223642fe8d12dd5e1e663af5.png" />