单项选择题
A.最小项表达式B.最简与一或式C.最大项表达式D.一般或一与式
A.计数器74193B.三-八译码器74138C.多路选择器74153D.优先编码器74148
A.∑m(3,4,5,6,7)B.πM(0,1,2)C.∑m(0,1,2)D.πM(3,4,5,6,7)