刘大维等认为我国饮水适宜氟浓度为
- A
- B
- C
- D
- E
饮水的适宜氟浓度一般应保持在A2.1~2.5mg/LB1.6~2.0mg/LC1.1~1.5mg/LD0.5~1.0mg/LE0.1~0.4mg/L
饮水的适宜氟浓度应控制在()A0.5mg/L以下B1mg/L以下C0.5~0.6mg/LD0.5~0.7mg/LE0.7~1mg/L
饮水的适宜氟浓度一般应保持在()A2.1~2.5mg/LB1.6~2.0mg/LC1.1~1.5mg/LD0.5~1.0mg/LE0.1~0.4mg/L
适宜的饮水氟浓度为()。A低于0.4mg/LB0.4~0.7mg/LC0.7~1.0mg/LD1.2~1.5mg/LE1.5~2.0mg/L
在进行人工饮水加氟时适宜的氟浓度一般应保持在A0.3~0.6mg/LB0.7~1.0mg/LC1.1~1.4mg/LD1.5~0.8mg/LE1.9~2.2mg/L
6、某山区氟牙症流行,调查饮水氟浓度不高,调查组经过认真分析,认为最可能的原因是
某山区氟牙症流行,调查饮水氟浓度不高,调查组经过认真分析,认为最可能的原因是A水果氟高B蔬菜氟高C空气氟高D煤油污染E垃圾污染