Pouring subsamples is less precise than pipetting either after shaking or stirring.It is also more difficult to obtain accurate volumes when pouring.

 
  • 搖勻或拌勻試管分次樣品較人工分次樣品準確,由于人工分次樣品較難以得到準確容量。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan