我国历史上第一次大规模农民起义是[ ]
A．陈胜吴广起义
B．国人暴动
C．周武灭商
D．商鞅变法
答案：A
At horse races, everyone has already studied the form (类型) of the horse______.
A．behind time
B．in progress
C．in advance
D．in time
刮板输送机相邻两节溜槽上下弯曲不得超过（）。
A.1~2o
B.2~4o
C.2~3o
