单选题:第二类危险源的风险控制中,最重要的工作是(  )。

题目内容:
第二类危险源的风险控制中,最重要的工作是(  )。 A.制定应急救援体系
B.设置安全监控系统
C.加强员工的安全意识培训和教育
D.改善作业环境

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