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冬天下午几点后没紫外线
更新时间: 2020-11-04 00:00:00  

没有太阳了就没有紫外线了。紫外线是无处不在的,只要太阳存在,紫外线就存在。而且,日光灯、各种荧光灯都会发出紫外线。一般早上是5:00~7:00下午5:00紫外线较弱,9:00以后紫外线较强,一般不要出门。出门应做好防晒。

关键词: 冬天 下午 紫外线

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