76.下列何種狀態的鉻(Cr)毒性最高?
(A)Cr0
(B)Cr2+
(C)Cr3+
(D)Cr6+
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統計: A(189), B(90), C(332), D(1221), E(0) #3136023
統計: A(189), B(90), C(332), D(1221), E(0) #3136023