题目内容
(请给出正确答案)
[单选题]
碗扣式脚手架搭设门洞,其横梁下立杆数量和间距应由计算确定,且立杆不应少于4排,每排横距不应大于()
A.400mm
B.350mm
C.300mm
D.250mm
E.200mm
答案
C、300mm
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A.400mm
B.350mm
C.300mm
D.250mm
E.200mm
C、300mm
A.1.2m
B.1.5m
C.1.8m
D.2m
A.1.2m
B.1.5m
C.1.8m
D.2m
A.两步
B.五步
C.四步
D.三步
A.3m
B.3.5m
C.4m
D.4.5m
A.两步
B.五步
C.四步
D.三步