A.兩知兩會(huì) B.三懂三會(huì) C.兩懂一會(huì) D.三知三有
A.車站站長(zhǎng) B.乘警 C.列車長(zhǎng) D.檢車長(zhǎng)
A.10 B.2 C.15 D.20