【单选题】【消耗次数：1】
会使轻钢龙骨石膏板隔墙板与墙体、顶板、地面连接出现裂缝的操作不包括( )。
①
边框龙骨与主体结构固定时，固定前未铺垫一层橡胶条或沥青泡沫塑料条
②
安装门窗洞口的加强龙骨后，再安装通贯横撑龙骨和支撑卡
③
石膏板安装时，两侧面的石膏板对缝排列，板与龙骨采用十字头自攻螺钉固定
④
隔墙下端的石膏板直接与地面接触
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暗龙骨吊顶工程施工质量控制要点不包括( )。
①
暗龙骨吊顶工程的吊杆、龙骨和饰面材料的安装必须牢固
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