A.氟碳鈣鈰礦 B.黃河礦 C.大青山礦 D.中華鈰礦
A.6% B.7% C.11% D.13%
A.氟碳鈣鈰礦和黃河礦 B.氟碳鈰礦和獨(dú)居石 C.獨(dú)居石和易解石 D.氟碳鈰礦和白云鄂博礦