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【多选题】
下面有关定性决策方法中德尔菲法的描述中正确的是（）。
A.
德尔菲法以匿名方式通过几轮函询征求专家的意见，组织决策小组对每一轮的意见进行汇总整理后作为参考再发给各专家，供他们分析判断，以提出新的论证
B.
运用德尔菲法的关键是选择好专家
C.
德尔菲法中专家人数一般以10～50人较好
D.
德尔菲法意见征询表的质量直接关系到决策的有效性
E.
德尔菲法中专家人数一般以3～5人较好
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