46.下列何者不具有幾何異構物(geometric isomer)?
(A)CF2CF2
(B)CHFCHF
(C)CHFC(CH3)H
(D)C(CH3)FCHF
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統計: A(2465), B(175), C(192), D(95), E(0) #3381367
統計: A(2465), B(175), C(192), D(95), E(0) #3381367