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
相关考题:
水源加氟是一种有效的防龋手段,我国的水质标准氟浓度为:()A.0.05ppm~0.1ppmB.0.1ppm~0.5ppmC.0.5ppm~1ppmD.1ppm~5ppmE.5ppm~10ppm
单选题我国现行水质标准氟浓度为( )A0.1~0.4ppmB0.01~0.05ppmC0.5~1.0ppmD1.1~2.0ppmE﹥2ppm