我国适宜的饮水氟浓度为
2023-05-20
A.0.5~1.0mg/L
B.1.0~1.5mg/L
C.0.7~1mg/L
D.0.7~1.2mg/L
E.0.5~0.9mg/L
参考答案:C
B.1.0~1.5mg/L
C.0.7~1mg/L
D.0.7~1.2mg/L
E.0.5~0.9mg/L
参考答案:C
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2023-05-20
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