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【多选题】
关于紫外线 , 以下叙述正确的是
A.
其杀菌作用与波长有关
B.
可损坏细菌的DNA结构
C.
紫外线适用于空气或物体表面的消毒
D.
其穿透力弱，故对人体无损害
E.
紫外线可用于牛奶的消毒
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