来自胡玉鹏的问题
(2014•温州二模)王大伯要做一张如图的梯子,梯子共有7级互相平行的踏板,每相邻两级踏板之间的距离都相等.已知梯子最上面一级踏板的长度A1B1=0.5m,最下面一级踏板的长度A7B7=0.8m.
(2014•温州二模)王大伯要做一张如图的梯子,梯子共有7级互相平行的踏板,每相邻两级踏板之间的距离都相等.已知梯子最上面一级踏板的长度A1B1=0.5m,最下面一级踏板的长度A7B7=0.8m.则第5级踏板的长度为()
A.0.6m
B.0.65m
C.0.7m
D.0.75m
1回答
2020-05-07 01:36