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【单选题】
生产、经营、储存、运输、使用危险化学品和处置废弃危险化学品的单位，其( )必须保证本单位危险化学品的安全管理符合有关法律、法规、规章的规定和国家标准，并对本单位危险化学品的安全负责。
A.
主要负责人
B.
技术人员
C.
从业人员
D.
安全管理人员
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