A-A+
A．It will stop automatically.B．It will move on
问题详情
A．It will stop automatically.
B．It will move on at the same speed.
C．It will gradually slow down.
D．It will keep a safe distance from the other trains.
参考答案
正确答案：A
解析：事实细节题。本题关键句为“If the command spot sends no signals，the train will stop．”如果指令点没有信号发出，火车会停下来。故正确答案为A。
