(来学网)氢火焰离子化检测器通常使用的氮气-氢气-空气的流量比是
  • A.
    (来学网)3:30:300
  • B.
    (来学网)30:30:30
  • C.
    (来学网)30:30:100
  • D.
    (来学网)30:10:300
  • E.
    (来学网)30:30:300