(单选题)17: CH3CH=CHCH2CH=CHCF3 + Br2 (1 mol) 主要产物为:
A: CH3CHBrCHBrCH2CH=CHCF3
B: CH3CH=CHCH2CHBrCHBrCF3
C: CH3CHBrCH=CHCH2CHBrCF3
D: CH3CHBrCH=CHCHBrCH2CF3
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