问题
单项选择题 A1型题
饮水氟化预防龋病的适宜浓度是()
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
答案
参考答案:C
饮水氟化预防龋病的适宜浓度是()
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
参考答案:C