单项选择题
A.5°,100mm B.10°,100mm C.5°,200mm D.10°,200mm
A.25mm2 B.35mm2 C.50mm2 D.70mm2
A.1.0~1.5m,0.5~0.8m B.0.8~1.2m,0.5~0.8m C.0.6~1.0m,0.3~0.4m D.0.6~1.0m,0.5~0.6m