A hump yard is a railway yard found at some freight train stations， used to separate railway cars onto one of several tracks.。
A.正确
B.错误
正确答案：正确
A hump yard is a railway yard found at some freight train stations， used to separate railway cars onto one of several tracks.。
4次阅读
A transport hub is a place where passengers and cargo are exchanged between vehicles or between transport modes.。
For nearly 100 years， what is the fastest and most popular way to travel？