【简答题】放射性核素衰变的方式有α衰变、β衰变、正电子衰变、____、____。
【简答题】A.They are having a party. B.They are playing the piano. C.Someone else is having a party. D.Someone else is funny.
【判断题】采用竞争对等法进行促销预算,应考虑本企业与竞争对手在生产经营规模、市场占有率等方面的差异( )A. 对 B. 错
【简答题】核衰变方式有______、______、______、______和______。