紫外线用于空气消毒时，其有效强度低于多少时应立即更换
A.90μW/cm2
B.80μW/cm2
C.70μW/cm2
D.60μW/cm2
E. 50μW/cm2
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正确答案： C 答案分析：无
包含此试题的试卷：
相关的试题
A.90μW/cm2
B.80μW/cm2
C.70μW/cm2
D.60μW/cm2
E. 50μW/cm2
A.90μW/cm2
B.80μW/cm2
C.70μW/cm2
D.60μW/cm2
E. 50μW/cm2
A.90μW/cm2
B.80μW/cm2
C.70μW/cm2
D.60μW/cm2
E. 50μW/cm2
A.90μW/cm2
B.80μW/cm2
C.70μW/cm2
D.60μW/cm2
E. 50μW/cm2
A.90μW/cm2
B.80μW/cm2
C.70μW/cm2
D.60μW/cm2
E. 50μW/cm2
A.90μW/cm2
B.80μW/cm2
C.70μW/cm2
D.60μW/cm2
E. 50μW/cm2
A.90μW/cm2
B.80μW/cm2
C.70μW/cm2
D.60μW/cm2
E. 50μW/cm2
A.90μW/cm2
B.80μW/cm2
C.70μW/cm2
D.60μW/cm2
E. 50μW/cm2
A.90μW/cm2
B.80μW/cm2
C.70μW/cm2
D.60μW/cm2
E. 50μW/cm2
A.90μW/cm2
B.80μW/cm2
C.70μW/cm2
D.60μW/cm2
E. 50μW/cm2
