A: Y1=0, Y2=0, Y3=Hi-Z, Y4=0, Y5=0, Y6=0, Y7=0, Y8=0
B: Y1=0, Y2=0, Y3=0, Y4=0, Y5=0, Y6=0, Y7=0, Y8=0
C: Y1=0, Y2=0, Y3=Hi-Z, Y4=1, Y5=0, Y6=0, Y7=0, Y8=0
D: Y1=0, Y2=0, Y3=Hi-Z, Y4=0, Y5=1, Y6=0, Y7=0, Y8=0
举一反三
- 题图中的电路均为TTL门电路,试写出各电路输出Y1~Y8状态[img=2754x1057]18034dde4fbdef5.jpg[/img] A: Y1=0, Y2=0, Y3=Hi-Z, Y4=0, Y5=0, Y6=0, Y7=0, Y8=0 B: Y1=0, Y2=0, Y3=0, Y4=0, Y5=0, Y6=0, Y7=0, Y8=0 C: Y1=0, Y2=0, Y3=Hi-Z, Y4=1, Y5=0, Y6=0, Y7=0, Y8=0 D: Y1=0, Y2=0, Y3=Hi-Z, Y4=0, Y5=1, Y6=0, Y7=0, Y8=0
- 下图中的电路均为TTL门电路,试写出各电路输出Y1~Y8状态[img=446x162]18034ddf5432d8c.png[/img] A: Y1=0, Y2=1, Y3=Hi-Z, Y4=0, Y5=0, Y6=0, Y7=0, Y8=0. B: Y1=1, Y2=1, Y3=Hi-Z, Y4=0, Y5=0, Y6=0, Y7=0, Y8=0. C: Y1=0, Y2=0, Y3=Hi-Z, Y4=0, Y5=0, Y6=0, Y7=0, Y8=0. D: Y1=0, Y2=1, Y3=Hi-Z, Y4=0, Y5=0, Y6=0, Y7=1, Y8=0.
- 题图中的电路均为TTL门电路,试写出各电路输出Y1~Y8状态[img=2754x1057]1802fa79393590f.jpg[/img] A: Y1=0, Y2=0, Y3=Hi-Z, Y4=0, Y5=0, Y6=0, Y7=0, Y8=0 B: Y1=0, Y2=0, Y3=0, Y4=0, Y5=0, Y6=0, Y7=0, Y8=0 C: Y1=0, Y2=0, Y3=Hi-Z, Y4=1, Y5=0, Y6=0, Y7=0, Y8=0 D: Y1=0, Y2=0, Y3=Hi-Z, Y4=0, Y5=1, Y6=0, Y7=0, Y8=0
- 题图中的电路均为TTL门电路,试写出各电路输出Y1~Y8状态[img=2754x1057]17de831a36c87d0.jpg[/img] A: Y1=0, Y2=0, Y3=Hi-Z, Y4=0, Y5=0, Y6=0, Y7=0, Y8=0 B: Y1=0, Y2=0, Y3=0, Y4=0, Y5=0, Y6=0, Y7=0, Y8=0 C: Y1=0, Y2=0, Y3=Hi-Z, Y4=1, Y5=0, Y6=0, Y7=0, Y8=0 D: Y1=0, Y2=0, Y3=Hi-Z, Y4=0, Y5=1, Y6=0, Y7=0, Y8=0
- 题图中的电路均为TTL门电路,试写出各电路输出Y1~Y8状态: A: Y1=0, Y2=0, Y3=Hi-Z, Y4=0, Y5=0, Y6=0, Y7=0, Y8=0 B: Y1=0, Y2=0, Y3=0, Y4=0, Y5=0, Y6=0, Y7=0, Y8=0 C: Y1=0, Y2=0, Y3=Hi-Z, Y4=1, Y5=0, Y6=0, Y7=0, Y8=0 D: Y1=0, Y2=0, Y3=Hi-Z, Y4=0, Y5=1, Y6=0, Y7=0, Y8=0
内容
- 0
【单选题】题图中的电路均为TTL门电路,试写出各电路输出Y1~Y8状态【图片】 A. Y1=0, Y2=0, Y3=Hi-Z, Y4=0, Y5=0, Y6=0, Y7=0, Y8=0 B. Y1=0, Y2=0, Y3=0, Y4=0, Y5=0, Y6=0, Y7=0, Y8=0 C. Y1=0, Y2=0, Y3=Hi-Z, Y4=1, Y5=0, Y6=0, Y7=0, Y8=0 D. Y1=0, Y2=0, Y3=Hi-Z, Y4=0, Y5=1, Y6=0, Y7=0, Y8=0
- 1
求下列微分方程的通解:(1)y〞-2yˊ=0;(2)y〞-3yˊ+2y=0;(3)y〞+4y=0;(4)y〞-4yˊ+5y=0;(5)y〞-6yˊ+9y=0;(6)y〞+2yˊ+ay=0;(7)y〞+6y〞+10yˊ=0;(8)y(4)-2y〞+y=0;(9)y(4)+2y〞+y=0;(10)y(4)+3y〞-4y=0.
- 2
用三线-八线译码器74LS138和辅助门电路实现逻辑函数Y=A2+A2'A1’,表达式应为( )。 A: 用或门,Y=Y0’+Y1’+Y2’+Y3’+Y5’+Y7’ B: 用或门,Y=Y0’+Y2’+Y4’+Y5’+Y6’+Y7’ C: 用与非门,Y=(Y0’Y1’Y2’Y3’Y5’Y7’)’ D: 用与非门,Y=(Y0’Y1’Y4’Y5’Y6’Y7’)’
- 3
用三线-八线译码器74LS138和辅助门电路实现逻辑函数Y=A2+A2′A1′,应()。 A: 用与非门,Y=(Y0´Y1´Y4´Y5´Y6´Y7´)´ B: 用与门,Y=Y2´Y3´ C: 用或门,Y=Y2´+Y3´ D: 用或门,Y=Y=Y0´+Y1´+Y4´+Y5´+Y6´+Y7´
- 4
变量Y必须同时满足以下两条件:①能被4整除,但不能被5整除;②能被3整除。下列逻辑表达式正确的是(&&代表与,||代表或) A: y%4==0 && y%5!=0 || y%3==0 B: y%4==0 && y%5!=0 && y%3==0 C: y%4==0 || y%5!=0 || y%3==0 D: y%4==0 || y%5!=0 && y%3==0