A.8 B.6 C.4 D.2
A.15 B.10 C.2 D.16
A.二進(jìn)制計(jì)數(shù)器 B.十進(jìn)制計(jì)數(shù)器 C.循環(huán)碼計(jì)數(shù)器 D.可逆計(jì)數(shù)器