单项选择题
A.0.5m B.0.7m C.1m D.l.5m
A.±5mm B.±10mm C.±20mm D.±60mm
A.3~5mm B.5~8mm C.5mm D.l0mm
A.lm B.1~8m C.l~2m D.2~2.5m
微信扫一扫,加关注免费搜题
