A.環(huán)太平洋; B.特提斯; C.中亞; D.中非
A.沉積礦床; B.巖漿礦床; C.變成礦床; D.受變質(zhì)礦床
A.沙洲說(shuō); B.沙漠說(shuō); C.薩布哈說(shuō); D.干鹽湖說(shuō)