题目内容：
按照结构布置的不同，启闭机主要分为（ ）。
A．卷扬式 B．固定式
C．门式
D．移动式
E．油压式
参考答案：
答案解析：
多选题：按照结构布置的不同，启闭机主要分为（ ）。
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- 题目类型：多选题
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B．固定式
C．门式
D．移动式
E．油压式
B．固定式
C．门式
D．移动式
E．油压式
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