38.下列何者可能沒有順反異構物?
(A)C2H4Cl2
(B)C2H2D2
(C)CHCl=CHBr
(D)CH3CCl=CClCH3
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統計: A(1), B(1), C(0), D(0), E(0) #626050
統計: A(1), B(1), C(0), D(0), E(0) #626050