A .小于0.2mg/l
B .小于0.5mg/l
C .0.5-1.0mg/l
D .大于1.0mg/l
[单选题]饮用水的适宜氟浓度是()A.1.0~1.2mg/LB.0.7~1.0mg/LC.0.5~0.7mg/LD.0.3~0.5mg/LE.<0.3mg/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]生活饮用水中镉的允许浓度为A.0.01μg/LB.0.001mg/LC.0.01mg/LD.0.005mg/LE.0.1mg/L
[单选题]生活饮用水中硒的允许浓度为A.0.01μg/LB.0.001mg/LC.0.01mg/LD.0.005mg/LE.0.1mg/L
[单选题]生活饮用水中汞的允许浓度为A.0.01μg/LB.0.001mg/LC.0.01mg/LD.0.005mg/LE.0.1mg/L
[单选题]生活饮用水中锰的允许浓度为A.0.1mg/LB.0.3mg/LC.0.5mg/LD.1.0mg/LE.1.5mg/L
[单选题]生活饮用水中铁的允许浓度为A.0.1mg/LB.0.3mg/LC.0.5mg/LD.1.0mg/LE.1.5mg/L