[多项选择]依据《生产安全事故报告和调查处理条例》事故调查组履行下列职责（）。
A. 查明事故发生的经过、原因、人员伤亡情况及直接经济损失
B. 认定事故的性质和事故责任
C. 提出对事故责任者的处理建议
D. 总结事故教训，提出防范和整改措施
E. 提交事故调查报告

{{B}} How important is job satisfaction {{/B}}
At its most basic, a job is just a collection of tasks and duties. An employee’s enjoyment of his or her job will thus {{U}} (21) {{/U}} depend upon whether or not he or she is happy with the particular mix of tasks and duties {{U}} (22) {{/U}} to that position. Naturally, each and every member of staff is different - some employees want to do easy, {{U}} (23) {{/U}} tasks without any responsibilities at all, whilst others prefer challenging, varied ones and are pleased to accept any additional responsibilities offered to them. Of course, with a job there are more {{U}} (24) {{/U}} in play than this: work conditions, pay, working relations and fut
A. pieces
B. roles
C. factors
D. parts