A.2.1~2.5mg/L
B.1.6~2.0mg/L
C.1.1~1.5mg/L
D.0.5~1.0mg/L
E.0.1~0.4mg/L
[单选题]饮水的适宜氟浓度一般应保持在A.2.1~2.5mg£¯LB.1.6~2.0mg£¯LC.1.1~1.5mg£¯LSX饮水的适宜氟浓度一般应保持在A.2.1~2.5mg/LB.1.6~2.0mg/LC.1.1~1.5mg/LD.0.5~1.0mg/LE.0.1~0.4mg/L
[单选题]饮水的适宜氟浓度一般应保持在()A . 2.1~2.5mg/LB . 1.6~2.0mg/LC . 1.1~1.5mg/LD . 0.5~1.0mg/LE . 0.1~0.4mg/L
[单选题]饮水的适宜氟浓度一般应保持在()A.2.1~2.5mg/LB.1.6~2.0mg/LC.1.1~1.5mg/LD.0.5~1.0mg/LE.0.1~0
[单选题]饮水的适宜氟浓度一般应保持在A.2.1~2.5mg/LB.1.6~2.0mg/LC.1.1~1.5mg/LD.0.5~1.0mg/LE.0.1~0.4mg/L
[单选题]饮水的适宜氟浓度一般保持A.0.4~0.7mg/LB.0.5~1.0mg/LC.0.6~0.9mg/LD.0.7~1mg/LE.0.8~1.5mg/L
[单选题]饮水的适宜氟浓度一般保持A.0.4~0.7mg/LB.0.5~1.0mg/LC.0.6~0.9mg/LD.0.7~1mg/LE.0.8~1.5mg/L
[单选题]在进行人工饮水加氟时适宜的氟浓度一般应保持在A.0.3~0.6mg/LB.0.7~1.0mg/LC.1.1~1.4mg/LD.1.5~0.8mg/LE.1.9~2.2mg/L
[单选题]饮水的适宜氟浓度应控制在()A.0.5mg/L以下B.1mg/L以下C.0.5~0.6mg/LD.0.5~0.7mg/LE.0.7~1mg/L
[单选题]饮水的适宜氟浓度应控制在()A.0.5mg/L以下B.1mg/L以下C.0.5~0.6mg/LD.0.5~0.7mg/LE.0.7~1mg/L
[单选题]饮水的适宜氟浓度应控制在()A . 0.5mg/L以下B . 1mg/L以下C . 0.5~0.6mg/LD . 0.5~0.7mg/LE . 0.7~1mg/L