试着回答一下:`ÎL1&ñ¹44bbs.3c3t.com:Öþt|Ò
1.高空作业人员未系安全带;`ÎL1&ñ¹44bbs.3c3t.com:Öþt|Ò
2.未搭设安全网;`ÎL1&ñ¹44bbs.3c3t.com:Öþt|Ò
3.现场未设警示标志;`ÎL1&ñ¹44bbs.3c3t.com:Öþt|Ò
4.未见专门指挥员;`ÎL1&ñ¹44bbs.3c3t.com:Öþt|Ò
5.起重臂下不得站人。`ÎL1&ñ¹44bbs.3c3t.com:Öþt|Ò