【多选题】【消耗次数：1】
建筑结构中楼板层是由（）几个基本的部分组成。
①
结构层
②
面层
③
顶棚
④
保温层
⑤
隔离层
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按照结构层、防水层和保温层所处的地位不同，屋顶保温体系可分为（）三种。
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