关于一般环境条件下建筑结构混凝土板构造要求的说法，错误的是（）。

答案查看网，轻松搜题/搜资源

【单选题】【消耗次数：1】

① 屋面板厚度一般不小于60mm

② 楼板厚度一般不小于80mm

③ 楼板的保护层厚度不小于35mm

④ 楼板受力钢筋间距不宜大于250mm

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