在列车承受的荷载中将偶然作用且最大值不经常出现的荷载称为（）。
参考答案：附加力荷载
Why ______ our bicycles to explore the Ming Tombs? They were the emperors' tombs. [ ]
A. not ride
B. not rides
C. not riding
盘形制动有哪些特点？
