【单选题】【消耗次数：1】
对饮用水进行氯化消毒时，起杀菌作用的主要是
①
Cl2
②
HOCl
③
Cl—
④
OCl—
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相关题目
【单选题】
大部分消毒剂在高浓度时杀菌作用大，当浓度降低至一定程度时只有抑菌作用，但下列哪种消毒剂除外
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苯扎溴铵(新洁尔灭)
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苯酚(石炭酸)
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乙醇
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碘附
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