• 2022-06-19
    采用共阳极数码管的译码显示电路,若显示数是3,则译码器各输出端电平
    A: a=b=c= d =g=1;e =f=0
    B: a= c= d =g=1;b= e =f=0
    C: a=b=c= d =g=0;e =f=1
    D: a= c= d =g=0;b = e =f=1