A.20minB.30minC.60minD.90min
A.0.01-0.05ppmB.0.05-0.3ppmC.0.3-0.5ppmD.0.5-1.0ppm
A.75%食用酒精消毒B.80%食用酒精消毒C.95%食用酒精消毒D.100%食用酒精消毒