• 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

  • 2022-05-29 问题

    标准正态分布曲线的特征是() A: μ=0,σ=0 B: μ=0,σ=1 C: μ=0,σ=-1 D: μ=1,σ=0 E: μ=1,σ=1

    标准正态分布曲线的特征是() A: μ=0,σ=0 B: μ=0,σ=1 C: μ=0,σ=-1 D: μ=1,σ=0 E: μ=1,σ=1

  • 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……

  • 2021-04-14 问题

    已知逻辑函数式为 F = A B + B C,可列出真值表如表2中的是( ) A B C ① ② ③ ④ 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1 0 0 0 0 1 0 1 0 0 1 1 0 1 1 0 1 0 0 0 0 0 1 0 0 0 0 0 1 1 0 1 1

    已知逻辑函数式为 F = A B + B C,可列出真值表如表2中的是( ) A B C ① ② ③ ④ 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1 0 0 0 0 1 0 1 0 0 1 1 0 1 1 0 1 0 0 0 0 0 1 0 0 0 0 0 1 1 0 1 1

  • 2022-05-29 问题

    标准正态分布曲线的特征是() A: Aμ=σ,σ=0 B: Bμ=0,σ=1 C: Cμ=0,σ=-1 D: Dμ=1,σ=0 E: Eμ=1,σ=1

    标准正态分布曲线的特征是() A: Aμ=σ,σ=0 B: Bμ=0,σ=1 C: Cμ=0,σ=-1 D: Dμ=1,σ=0 E: Eμ=1,σ=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]]

  • 2022-06-28 问题

    对于一个氧化还原反应,下列各组中正确的关系应是。 A: ΔrGmѲ>0、EѲ<0、Kθ<1 B: ΔrGmѲ>0、EѲ>0、Kθ>1 C: ΔrGmѲ<0、EѲ<0、Kθ>1 D: ΔrGmѲ<0、EѲ>0、Kθ<1

    对于一个氧化还原反应,下列各组中正确的关系应是。 A: ΔrGmѲ>0、EѲ<0、Kθ<1 B: ΔrGmѲ>0、EѲ>0、Kθ>1 C: ΔrGmѲ<0、EѲ<0、Kθ>1 D: ΔrGmѲ<0、EѲ>0、Kθ<1

  • 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

  • 2022-05-29 问题

    标准正态分布曲线的特征是() A: μ=σ,σ=0 B: μ=0,σ=1 C: μ=0,σ=-1 D: μ=1,σ=0 E: μ=1,σ=1

    标准正态分布曲线的特征是() A: μ=σ,σ=0 B: μ=0,σ=1 C: μ=0,σ=-1 D: μ=1,σ=0 E: μ=1,σ=1

  • 2022-05-29 问题

    标准正态分布曲线的特征是()。 A: μ=0,σ=1 B: μ=1,σ=0 C: μ=0,σ=0 D: μ=1,σ=1 E: μ=0,σ值不确定

    标准正态分布曲线的特征是()。 A: μ=0,σ=1 B: μ=1,σ=0 C: μ=0,σ=0 D: μ=1,σ=1 E: μ=0,σ值不确定

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