一列火车长120m,匀速通过长360m的山洞,从火车进洞到车尾离洞共用1min,火车行驶的平均速度是( )
A:10m/s
B:6m/s
C:8m/s
D:2m/s
—I wonder if I park my car here.
—Of course it does. You need to find a safer place.