单项选择题

地面预防性消毒的浓度()

A.100mg/L-250mg/L含氯擦拭或浸泡,消毒10-30min
B.250mg/L-500mg/L含氯擦拭或浸泡,消毒10-30min
C.500mg/L-1000mg/L含氯擦拭或浸泡,消毒10-30min