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单项选择题
隐蔽工程施工完毕后,由专业工长填写隐检记录,( )组织监理单位旁站,施工单位专业工长、质量检查员共同参加。
A.项目经理
B.施工班组长
C.专职安全员
D.项目技术负责人
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未知题型
设A是n阶对称矩阵,则A的属于相同特征值的特征向量一定正交.
单项选择题
___ ,she is experienced.s she is youngB.Youngs is she C.Youngs she isD.Though she ws young___ ,she is experienced.s she is young B.Youngs is she C.Youngs she is D.Though she ws young
A.As she is youngB.Young as is sheC.Young as she isD.Though she was young
问答题
为什么有的矿井或采区必须设一条专用回风巷?
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