3、与HX加誠 CH3 -C=CH+ HBr- CH3-C=CH Br Br H CH3-C-CH3 Br 加成反应符合马氏親则3、与HX加成 CH3 - C = CH + HBr CH3 - C = CH Br H CH3 - C - CH3 Br Br 加成反应符合马氏规则