地方性氟中毒中等病区的划分依据是()
A.缺损型氟斑牙患病率>20%
B.重度氟骨症患者<2%
C.饮水含氟量>2.0mg/L
D.总摄氟量>5.0mg
E.总摄氟量>7.0mg
正确答案是ABCD
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