多选题：下列关于高处作业的划分规定正确的是（　　）。

题目内容：

下列关于高处作业的划分规定正确的是（　　）。 A．高度在4～8m时，称为一级高处作业
B．高度在5～15m时，称为二级高处作业
C．高度在8～18m时，称为二级高处作业
D．高度在15～30m时，称为三级高处作业
E．高度在18～33m时，称为三级高处作业

参考答案：

答案解析：

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