A.一次 B.二次 C.三次 D.四次
A.銅礦 B.石油礦 C.天然氣礦 D.液態(tài)礦
A.大隊(duì)長(zhǎng) B.中隊(duì)長(zhǎng) C.小隊(duì)長(zhǎng) D.副小隊(duì)長(zhǎng) E.隊(duì)員