题目内容

大数据产业是指一切与支撑大数据组织管理和价值发现相关的企业经济活动的集合。以下哪些属于大数据产业的某个环节（）

A. IT基础设施层
B. 数据源层
C. 数据管理层
D. 数据分析层

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