72. The corrosion of which transition metal results in a characteristic green patina?
(A) lead
(B) copper
(C) chromium
(D) silver
(E) iron
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統計: A(1), B(8), C(2), D(0), E(0) #3421267
統計: A(1), B(8), C(2), D(0), E(0) #3421267