【单选题】【消耗次数：1】
民用建筑的主要楼梯一般布置在（ ）
①
建筑物次要入口附近
②
主要入口附近位置明显的部位
③
一定要在房屋的中间部位
④
一定要在房屋的端部
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民用建筑的主要楼梯一般布置在[填空(1)]
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插入零部件一定要在[[填空(1)]]界面中。
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民用建筑楼梯的位置按其使用性质可分为()。
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主要楼梯、次要楼梯、疏散楼梯
②
弧形楼梯、螺旋楼梯、直跑楼梯
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主要楼梯、景观楼梯、消防楼梯
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双跑楼梯、扇形楼梯、景观楼梯
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