饮水加氟时适宜的氟浓度一般为
A.0.3~0.6mg/L
B.0.7~1.0mg/L
C.1.2~1.4mg/L
D.1.5~1.8mg/l
E.2.0~2.2mg/L
1.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
2.饮水氟化预防龋病的适宜氟浓度是A.0.1~0.3mg/LB.0.4~0.6mg/LC.0.7~1.0mg/LD.1.1~1.3mg/LE.1.4~1.6mg/L
3.饮水加氟的适宜浓度是A.0.3~0.5mg/LB.0.5~0.7mg/LC.0.7~1.0mg/LD.1.0~1.2mg/LE.1.2~1.5mg/L
4.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.1.5~1.8mg/LE.1.9~2.2mg/L
第1题:
饮水氟化预防龋病的适宜氟浓度是
A.0.1~0.3mg/L
B.0.4~0.6mg/L
C.0.7~1.0mg/L
D.1.1~1.3mg/L
E.1.4~1.6mg/L
第2题:
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