42.Cobalt與下列何種營養素有關?
(A)vitamin B12
(B)vitamin B2
(C)vitamin B1
(D)vitamin B6
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統計: A(705), B(46), C(36), D(103), E(0) #3284541
統計: A(705), B(46), C(36), D(103), E(0) #3284541