我国现行水质标准氟浓度为()A、0.1~0.4ppmB、0.01~0.05ppmC、0.5~1.0ppmD、1.1~2.0ppmE、>2ppm

我国现行水质标准氟浓度为()

  • A、0.1~0.4ppm
  • B、0.01~0.05ppm
  • C、0.5~1.0ppm
  • D、1.1~2.0ppm
  • E、>2ppm

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