A.600m B.800m C.1000m
A.信號(hào)好了提前呼、信號(hào)未好不早呼 B.信號(hào)好了不早呼、信號(hào)未好提前呼 C.信號(hào)好了及時(shí)呼、信號(hào)未好提前呼
A.接車進(jìn)路 B.發(fā)車進(jìn)路 C.通過