单项选择题
A.0.05% B.0.05‰ C.2% D.0.1%
A.±5mm B.±50mm C.±70mm D.±110mm
A.100mm岸 B.l50mm C.300mm D．500mm
A.±5mm B.±10mm C.±3mm D.±20mm
微信扫一扫,加关注免费搜题
