A.質(zhì)子數(shù)和中子數(shù)都為偶數(shù)B.質(zhì)子數(shù)和中子數(shù)為一奇一偶C.質(zhì)子數(shù)和中子數(shù)都為奇數(shù)D.以上都不對(duì)