【单选题】【消耗次数：1】
违章作业、违章指挥、违反劳动纪律指的是人的不安全行为，均属于（ ）。
①
第二类危险源
②
第一类危险源
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第二类危险源是指造成约束、限制能量措施失效或破坏的各种不安全因素。下列方法中，（）是控制第二类危险源的方法。
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