整备作业的定义？
参考答案：
指列车、机车、车辆、轨道车等进行检查、试验设备功能、清扫等作业。整备作业过程中发生的行车事故，按调车事故论。
— Did you see who the driver was?
— No, the car ran so fast ____ I couldn't have a good look at his face. [ ]
A. that
B. which
C. as
D. after
A．裂变
B．聚变
C．热核反应
D．裂变和聚变
