我国适宜的饮水氟浓度为A.0.5~1.0mg/L B.1.0~1.5mg/L

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问题 我国适宜的饮水氟浓度为A.0.5~1.0mg/LB.1.0~1.5mg/LC.0.7~1mg/LD.0.7~1.2mg/LE.0.5~0.9mg/L

选项 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

答案 C

解析
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