• 2022-05-31 问题

    以下两个表达式的值分别是()。1!1‖5>=2*2+125-1>3&&6<=4-!0A.1,0B.1,1C.0,1D.0,0

    以下两个表达式的值分别是()。1!1‖5>=2*2+125-1>3&&6<=4-!0A.1,0B.1,1C.0,1D.0,0

  • 2022-06-17 问题

    若所有观察值都落在回归直线上,则x与y之间的相关系数是______。 A: r=0 B: r=1 C: -1D.0 D: 0

    若所有观察值都落在回归直线上,则x与y之间的相关系数是______。 A: r=0 B: r=1 C: -1D.0 D: 0

  • 2022-06-16 问题

    以下HDB3码中,哪些可以确定其中有误码 A: +1 0 0 0 -1 0 +1 -1 +1 0 0 +1 0 -1 +1 -1 0 0 -1 +1…… B: +1 0 0 -1 +1 0 0 0 +1 -1 0 0 -1 0 0 0 +1 0 0 +1 -1…… C: -1 0 0 0 -1 0 +1 0 0 0 +1 -1 +1 0 0 +1 0 0 -1 +1…… D: -1 0 +1 0 0 0 -1 +1 0 0 0 +1 -1 +1 -1 0 0 -1 +1 0 -1……

    以下HDB3码中,哪些可以确定其中有误码 A: +1 0 0 0 -1 0 +1 -1 +1 0 0 +1 0 -1 +1 -1 0 0 -1 +1…… B: +1 0 0 -1 +1 0 0 0 +1 -1 0 0 -1 0 0 0 +1 0 0 +1 -1…… C: -1 0 0 0 -1 0 +1 0 0 0 +1 -1 +1 0 0 +1 0 0 -1 +1…… D: -1 0 +1 0 0 0 -1 +1 0 0 0 +1 -1 +1 -1 0 0 -1 +1 0 -1……

  • 2022-06-19 问题

    ‍对HDB3码-1000+100-1000-1+1000+1-1+1-100-1+1-1进行译码,结果是( )。‌ A: 1 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 0 1 1 0 0 0 0 1 1 B: 1 0 0 0 1 0 0 1 0 0 0 1 1 0 0 0 0 1 1 0 0 0 0 0 1 C: 1 0 1 0 1 0 0 1 0 0 0 0 1 1 0 0 0 1 1 0 0 0 0 1 1 D: 1 0 0 0 1 0 0 1 0 0 0 0 1 0 0 1 1 0 0 0 0 0 0 1 1

    ‍对HDB3码-1000+100-1000-1+1000+1-1+1-100-1+1-1进行译码,结果是( )。‌ A: 1 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 0 1 1 0 0 0 0 1 1 B: 1 0 0 0 1 0 0 1 0 0 0 1 1 0 0 0 0 1 1 0 0 0 0 0 1 C: 1 0 1 0 1 0 0 1 0 0 0 0 1 1 0 0 0 1 1 0 0 0 0 1 1 D: 1 0 0 0 1 0 0 1 0 0 0 0 1 0 0 1 1 0 0 0 0 0 0 1 1

  • 2022-07-24 问题

    1⊙1⊙1⊙1⊙0⊙0⊙0⊙0等于?() A: 0⊙0⊙0⊙1 B: 1⊕1⊕1⊕1 C: 1⊙0⊙0⊙1 D: 1⊕1⊙0⊙0

    1⊙1⊙1⊙1⊙0⊙0⊙0⊙0等于?() A: 0⊙0⊙0⊙1 B: 1⊕1⊕1⊕1 C: 1⊙0⊙0⊙1 D: 1⊕1⊙0⊙0

  • 2022-06-16 问题

    对信码1000100100001000011000011进行HDB3编码,结果可能是( )。 A: -1 0 0 0 +1 0 0 -1 0 0 0 -V +1 0 0 0 +V -1 +1 -B 0 0 -V +1 -1 B: +1 0 0 0 -1 0 0 +1 0 0 0 +V -1 0 0 0 -V +1 -1 +B 0 0 +V -1 +1 C: +1 0 0 0 -1 0 0 +1 0 0 0 +1 -1 0 0 0 -1 +1 -1 +1 0 0 +1 -1 +1 D: -1 0 0 0 +1 0 0 -1 0 0 0 +V +1 0 0 0 +V -1 +1 +B 0 0 -V +1 -1

    对信码1000100100001000011000011进行HDB3编码,结果可能是( )。 A: -1 0 0 0 +1 0 0 -1 0 0 0 -V +1 0 0 0 +V -1 +1 -B 0 0 -V +1 -1 B: +1 0 0 0 -1 0 0 +1 0 0 0 +V -1 0 0 0 -V +1 -1 +B 0 0 +V -1 +1 C: +1 0 0 0 -1 0 0 +1 0 0 0 +1 -1 0 0 0 -1 +1 -1 +1 0 0 +1 -1 +1 D: -1 0 0 0 +1 0 0 -1 0 0 0 +V +1 0 0 0 +V -1 +1 +B 0 0 -V +1 -1

  • 2021-04-14 问题

    编写程序,创建下列10*10的数组,数组边界全为1,里面全为0。 [[1 1 1 1 1 1 1 1 1 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 1 1 1 1 1 1 1 1 1]]

    编写程序,创建下列10*10的数组,数组边界全为1,里面全为0。 [[1 1 1 1 1 1 1 1 1 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 1 1 1 1 1 1 1 1 1]]

  • 2022-06-04 问题

    若逻辑表达式,则A、B、C、D分别为()。 A: 1、0、0、0 B: 0、1、0、0 C: 0、1、1、0 D: 1、0、1、1

    若逻辑表达式,则A、B、C、D分别为()。 A: 1、0、0、0 B: 0、1、0、0 C: 0、1、1、0 D: 1、0、1、1

  • 2022-06-03 问题

    在MATLAB中,A = 1:9,现在执行如下指令L1 = ~(A>;5),则MATLAB的执行结果应该是L1 =() A: 0 0 0 0 0 1 1 1 1 B: 1 1 1 1 1 0 0 0 0 C: 1 1 1 1 1 1 0 0 0 D: 0 0 0 0 0 0 1 1 1

    在MATLAB中,A = 1:9,现在执行如下指令L1 = ~(A>;5),则MATLAB的执行结果应该是L1 =() A: 0 0 0 0 0 1 1 1 1 B: 1 1 1 1 1 0 0 0 0 C: 1 1 1 1 1 1 0 0 0 D: 0 0 0 0 0 0 1 1 1

  • 2021-04-14 问题

    编写程序,创建下列10*10的数组,数组边界全为1,里面全为0。 [[1 1 1 1 1 1 1 1 1 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 1 1 1 1 1 1 1 1 1]] 提示:可以先创建全为0或者全为1的数组,再通过索引和切片机制进行修改

    编写程序,创建下列10*10的数组,数组边界全为1,里面全为0。 [[1 1 1 1 1 1 1 1 1 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 0 0 0 0 0 0 0 0 1] [1 1 1 1 1 1 1 1 1 1]] 提示:可以先创建全为0或者全为1的数组,再通过索引和切片机制进行修改

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