阿摩線上測驗
5 Iron objects such as storage tanks and underground pipelines can be protected from corrosion by connecting them through a wire to a piece of:
(A) Pb
(B) Ag
(C) Sn
(D) Cu
(E) Mg
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統計： A(1), B(5), C(7), D(4), E(5) #1414298
統計： A(1), B(5), C(7), D(4), E(5) #1414298
