單項(xiàng)選擇題
A.50% B.90% C.110% D.130%
A.軌道狀態(tài) B.路基 C.橋隧 D.噪聲振動(dòng)及防災(zāi)安全監(jiān)控系統(tǒng)
A.供變電接觸網(wǎng)系統(tǒng) B.通信信號(hào)系統(tǒng) C.客運(yùn)服務(wù)系統(tǒng) D.軌道結(jié)構(gòu)
A.30mm,5mm B.50mm,2mm C.50mm,5mm D.25mm,5mm
A.6 B.8 C.10 D.12
A.6 B.7 C.8 D.9
A.8 B.9 C.10 D.11