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[单选题]
使用含氯消毒剂对预防性消毒时,物体表面使用浓度为()
A.1000mg/L
B.≥2000mg/L
C.≥500mg/L
D.≥10000mg/L
查看答案
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A.1000mg/L
B.≥2000mg/L
C.≥500mg/L
D.≥10000mg/L
A.500mg/L
B.1000mg/L
C.2000mg/L
D.5000mg/L
E.10000mg/L
A.250mg/L
B.500mg/L
C.1000mg/L
D.2000mg/L
E.2500mg/L
A.4次/日、1000mg/L
B.4次/日、2000mg/L
C.6次/日、1000mg/L
D.6次/日、2000mg/L