A.工程勘探 B.生產(chǎn)勘探 C.補(bǔ)充勘探 D.資源勘探
A.8-10 B.5 C.2 D.3-5
A.邊際經(jīng)濟(jì) B.次邊際經(jīng)濟(jì) C.內(nèi)蘊(yùn)經(jīng)濟(jì) D.經(jīng)濟(jì)意義未定