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某化工股份有限公司是省属国有企业，各级机构健全。某日16时22分，公司所属4PE装置在停车检修过程中，操作工对V-306(排料回收槽)进行工艺处理，打开V-306放料阀，排放粉料。操作人员见排出的粉料与往常不同，有烟雾状气体出现，便立即关闭了放料阀。因排出物中夹带三和丙烷等可燃气体，瞬间三遇空气自燃，造成排出物中的可燃气体，使在距出料口下风侧20m处工作的某建设公司2名检修工甲、乙被烧伤。经医院诊断，甲需要休息3个月，乙需要休息1年，才能正常上班。 依据以上场景，回答下列问题： 请问这起事故应该由谁组织调查，哪些人员参加事故调查? 依据《企业职工伤亡事故分类标准》的规定，甲、受伤者是否都为重伤?
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【多选题】信用的安全主要包括哪些?
A.
来自买方的信用安全
B.
来自卖方的信用安全
C.
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