A.98%開關(guān) B.100%開關(guān) C.88%開關(guān) D.95%開關(guān)
A.開門試驗 B.關(guān)門試驗 C.集控試驗 D.5km/h信號功能模擬試驗
A.4S B.5S C.2S D.10S