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[单选题]
根据《建筑施工碗扣式钢管脚手架安全技术规范》(JGJ166),工程项目部技术员对碗扣式模板支撑体系立杆顶端可调托撑伸出项层水平杆的悬臂长度,选取10个点进行抽测,抽测结果如表所示,本次抽测悬臂长度的合格率是()。
A.40%
B.50%
C.70%
D.80%
查看答案
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A.40%
B.50%
C.70%
D.80%
A.1.2m
B.1.5m
C.1.8m
D.2m
A.1.2m
B.1.5m
C.1.8m
D.2m
A.200mm
B.250mm
C.300mm
D.350mm
A.500mm
B.550mm
C.600mm
D.650mm
A.1.2m
B.1.5m
C.1.8m
D.2m
A.3-6m
B.4-7m
C.5-8m
D.6-9m
A.2mm
B.2.5mm
C.3mm
D.3.5mm
A.6m
B.8m
C.10m
D.12m