【单选题】
紫外线消毒空气时，若每10m_TagUpStart_2_TagUpEnd_安装紫外线灯管1支，有效距离和消毒时间分别要 ___
A. <50cm>10分钟
B. <1.0m>20分钟
C. <1.5m>30分钟
D. <2m>30分钟
E. <3m>60分钟
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答案
D
解析
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