我国饮用水标准含氟量是A.0.5~1.0ppm B.2.0ppm C.1.5

题库2022-08-02  22

问题 我国饮用水标准含氟量是A.0.5~1.0ppmB.2.0ppmC.1.5ppmD.0.5ppmE.0.1ppm

选项 A.0.5~1.0ppm
B.2.0ppm
C.1.5ppm
D.0.5ppm
E.0.1ppm

答案 A

解析
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