A.1.0~1.2mg/L
B.0.7~1.0mg/L
C.0.5~0.7mg/L
D.0.3~0.5mg/L
E.<0.3mg/L
[单选题]饮用水中含氟的适宜浓度为()A .小于0.2mg/lB .小于0.5mg/lC .0.5-1.0mg/lD .大于1.0mg/l
[单选题,A2型题,A1/A2型题] 饮用水适宜的氟浓度一般为()。A . 0.5ppmB . 0.7~1ppmC . 1.0~1.5ppmD . 2.0ppmE . 以上均不是
[单选题]饮用水适宜的氟浓度一般为A.0.5ppmB.0.7~1ppmC.1.0~1.5ppmD.2.0ppmE.以上均不是
[单选题]饮用水适宜的氟浓度一般为( )。A.0.5ppmB.0.7~1ppmC.1.0~1.5ppmD.2.0ppmE.以上均不是
[判断题] 我国规定饮用水中氟浓度应小于1.0毫克/升。A . 正确B . 错误
[单选题,A2型题,A1/A2型题] 我国饮用水标准含氟量是()A . 0.1ppmB . 0.5ppmC . 0.5~1.0ppmD . 1.0~1.5ppmE . 1.0ppm
[单选题]我国饮用水标准含氟量是()A.0.1ppmB.0.5ppmC.0.5~1.0ppmD.1.0~1.5ppmE.1.0ppm
[单选题]我国饮用水标准含氟量是()A.0.1ppmB.0.5ppmC.0.5~1.0ppmD.1.0~1.5ppmE.1.0ppm
[单选题]我国饮用水标准含氟量是()A.0.0ppmB.0.5ppmC.0.5~1.0ppmD.1.0~1.5ppmE.1.0ppm
[单选题]我国饮用水标准含氟量是()A.0.0ppmB.0.5ppmC.0.5~1.0ppmD.1.0~1.5ppmE.1.0ppm