多选题：洁净厂房的火灾危险性包括：（　　）。

题目内容：

洁净厂房的火灾危险性包括：（　　）。 A．洁净区域大，防火分隔困难
B．室内迂回曲折，人员疏散困难
C．建筑结构密闭，排烟扑救困难
D．火灾蔓延迅速，早期发现困难
E．生产工艺特殊，次生灾害控制困难

参考答案：

答案解析：

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