第1题:
生活饮用水卫生规范中规定总硬度(以CaCO3mg/L计)不超过()。
A.250mg/L
B.350mg/L
C.400mg/L
D.450mg/L
E.500mg/L
第2题:
硫酸盐的允许值是
A.250mg/L
B.450mg/L
C.500mg/L
D.750mg/L
E.1000mg/L
第3题:
A.250mg/L,30-60min
B.500mg/L,30-60min
C.750mg/L,30-60min
D.1000mg/L,30-60min
第4题:
溶解性固体的允许值是
A.250mg/L
B.450mg/L
C.500mg/L
D.750mg/L
E.1000mg/L
第5题:
用碘伏对细菌繁殖体污染物品的消毒的浓度和时间分别是()
A.250mg/L,20min
B.50mg/L,40min
C.500mg/L,30min
D.200mg/L,15min
第6题:
用碘伏对细菌繁殖体污染物品消毒,其浓度和时间分别是
A.250mg/L,20min
B.50mg/L,40min
C.500mg/L,30min
D.200mg/L,15min
E.100mg/L,15min
第7题:
A.250mg/L的含氯消毒液
B.500mg/L的含氯消毒液
C.1000mg/L的含氯消毒液
D.2000mg/L的含氯消毒液
第8题:
生活饮用水中溶解性总固体限值为
A.250mg/L
B.350mg/L
C.450mg/L
D.750mg/L
E.1000mg/L
第9题:
手工清洗擦拭布巾时,把布巾清洗干净,在 mg/L有效氯消毒剂(或其他有效消毒剂)中浸泡30min,冲净消毒液,干燥备用。( )
A.250mg/L
B.500mg/L
C.1000 mg/L
D.2000mg/L
第10题: