Ernest Rutherford and Frederick Soddy were working out the nature of radioactivity.

 
  • 是盧琴福和索迪揭示了放射性的奧秘,發(fā)表了元素的嬗變理論。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan