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Bacar, the Dragon King2. Ensure the normal operation of iTunes;A rowing sport in which athletes paddle with their backs to the forward direction, originated in England from the 17th century to the middle of the 18th century.斯科特·谢泼德、巴里·斯隆、迈克尔·卢沃耶、马梅亚·博阿福、斯通·布莱登和詹·阿特金森。2019年4月26日起，每周五晚爱奇艺全网首播《奔跑吧第3季》。《奔跑吧3》是浙江卫视推出的户外竞技真人秀，由浙江卫视节目中心制作。七位固定主持是李晨、Angelababy（杨颖）、郑恺、朱亚文、王彦霖、黄旭熙、宋雨琦。节目采用主题模式，在设置上融入更具有时代感和地区意义的主线，明星分为不同的队伍进行比赛，最后获胜一方将获得称号或奖品。Each object has its corresponding state, and each state corresponds to some corresponding behaviors. If an object has multiple states, there will be many behaviors. Then the judgment of these states and the behavior completed according to the states will lead to multiple conditional statements, and if a new state is added, the existing code needs to be changed. This kind of design obviously violates the principle of opening and closing, and the state mode is used to solve such problems.