64.鉛合金擋塊(Cerrobend block)的組成成分,下列何者含量比例最低?
(A)Pb
(B)Cd
(C)Sn
(D)Bi
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統計: A(38), B(529), C(86), D(134), E(0) #3492292
統計: A(38), B(529), C(86), D(134), E(0) #3492292