A.既能進(jìn)行加法計(jì)數(shù)又能進(jìn)行減法計(jì)數(shù) B.加法計(jì)數(shù)和減法計(jì)數(shù)同時(shí)進(jìn)行 C.既能進(jìn)行二進(jìn)制計(jì)數(shù)又能進(jìn)行十進(jìn)制計(jì)數(shù) D.既能進(jìn)行同步計(jì)數(shù)又能進(jìn)行異步計(jì)數(shù)
A.3 B.4 C.5 D.10