- 搜標(biāo)題
- 搜題干
- 搜選項(xiàng)
單項(xiàng)選擇題
對(duì)于兩方向出站信號(hào)機(jī)為防止閃雙綠燈現(xiàn)象，電路采取的措施是（）
A.號(hào)開(kāi)放時(shí)使ZXJ先↑LXJ后↓
信號(hào)關(guān)閉時(shí)使ZXJ后↓LXJ先↑
B.信號(hào)開(kāi)放時(shí)使ZXJ后↑LXJ先↑
信號(hào)關(guān)閉時(shí)使ZXJ后↓LXJ先↓
C.信號(hào)開(kāi)放時(shí)使ZXJ后↑LXJ先↑
信號(hào)關(guān)閉時(shí)使ZXJ先↓LXJ后↓
D.號(hào)開(kāi)放時(shí)使ZXJ先↑LXJ后↑
信號(hào)關(guān)閉時(shí)使ZXJ先↓LXJ后↓
