A.LXJ和DXJ B.DJJ和DFJ C.DCJ和FCJ D.SJ和DGJ
A.5根 B.6根 C.7根 D.8根
A.進(jìn)路上各區(qū)段空閑 B.進(jìn)路上道岔位置正確且鎖閉 C.本咽喉敵對(duì)進(jìn)路未建立 D.迎面咽喉敵對(duì)進(jìn)路未建立