如图所示,将质量为10kg的小球挂在倾角为α=450的光滑斜面上,则
Train
From
To
Time for Leaving
Time for Arriving
11
Beijing
Shenyang
6:35
17:50
186
Chengdu
Taiyuan
22:50
5:05
185
13:09
19:30
271
Tianjin
8:35
10:21
读图回答问题.