单项选择题
A.在10s内道岔未移到命令位置 B.检测到锁闭继电器回采失败 C.道岔丢失所在的位置超过一秒 D.道岔状态既在左又在右
A.进路登记，进路实施，进路授权，进路取消，进路禁止 B.进路登记，进路实施，进路授权，进路释放，进路禁止 C.进路登记，进路执行，进路许可，进路取消，进路禁止 D.进路登记，进路执行，进路许可，进路释放，进路禁止
A.接近锁闭，转换锁闭，侧向防护锁闭，防护区段锁闭，方向锁闭 B.接近锁闭，转换锁闭，过岔锁闭，侧向防护锁闭，方向锁闭 C.接近锁闭，过岔锁闭，允许锁闭，侧向防护锁闭，方向锁闭 D.接近锁闭，转换锁闭，过岔锁闭，防护区段锁闭，侧向防护锁闭