下列职业健康安全管理体系的基本要素中，属于核心要素的是( ).

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25928' and id < 2176286 and id<>'2176286' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25928' and id > 2176286 and id<>'2176286' order by id asc limit 5