【多选题】【消耗次数：1】
皮肤可以抵御外来的哪些伤害？（）
①
A 水分流失
②
B 微生物感染
③
C 紫外线
④
D 灰尘和污染
参考答案：
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使用紫外线灯消毒时紫外线强度不低于（）
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A.“千村示范、万村整治”
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