单项选择题
A.1m×1m B.2m×2m C.3m×3m D.5m×5m
A.3m B.5m C.10m D.15m
A.8mm B.10mm C.12mm D.15mm
A.4mm B.3mm C.2mm D.1mm
微信扫一扫,加关注免费搜题