单项选择题
A.大于2.0m B.小于2.0m C.大于1.8m D.小于1.8m
A.35° B.45° C.20° D.30°
A.12cm B.15cm C.18cm D.20cm
A.0.9m B.1m C.1.2m D.1.5m
微信扫一扫,加关注免费搜题