单项选择题X 纠错
A.4.0m B.5.0m C.6.0m D.7.0m
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单项选择题
A.4~5个立杆间距或5~7m B.6~8个立杆间距或7~9m C.8~10个就杵间距或8~10m D.2~4个立杆间距或2~4m
A.1.5m B.1.2m C.1.8m D.2.0m
A.200mm B.250mm C.300mm D.350mm
A.h+1.5a B.h+2a C.h+2.5a D.h+3.0a
A.0.6m B.0.5m C.0.4m D.0.8m
A.45°~60° B.30°~45° C.25°~30° D.10°~40°
A.25mm×80mm B.20mm×60mm C.25mm×50mm D.20mm×70mm
A.2.0m B.1.8m C.1.5m D.2.5m
A.1/1000~3/1000 B.1/100~3/100 C.1/1000~1/1500 D.1/1500~1/2000
A.2mB.3mC.4mD.5m
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