我国现行水质标准氟浓度为 ( )A.0.5~1.0ppmB.1.1~2.0ppm

考试题库2022-08-02  45

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

选项 A.0.5~1.0ppmB.1.1~2.0ppmC.0.01~0.05ppmD.0.1~0.4ppmE.﹥2ppm

答案 A

解析
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