移动闭塞moving block
移动闭塞moving block
相关考题：
为了避免震动，用低速控制钮减低移动舱盖的速度。（）A、To avoid shock, reduce the speed of moving hatch cover by inching control.B、To avoid shock, reduce the speed of moving hatch cover by control levers.C、To avoid shock, reduce the position of moving hatch cover by inching control.D、To avoid shock, reduce the course of moving hatch cover by control levers.
单选题为了避免震动，用低速控制钮减低移动舱盖的速度。（）ATo avoid shock, reduce the speed of moving hatch cover by inching control.BTo avoid shock, reduce the speed of moving hatch cover by control levers.CTo avoid shock, reduce the position of moving hatch cover by inching control.DTo avoid shock, reduce the course of moving hatch cover by control levers.
单选题虚拟闭塞是（）的一种特殊方式。A固定闭塞B准移动闭塞C移动闭塞D人工闭塞