Concentration of cobalt in running water of Guangzhou as well as Zhongshan Uni-versity were 2.0 PPb,in Pearl River water was 3.8 PPb.

 
  • 前兩者含鈷量均為2.;0PPb;后者含鈷量為3
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan