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User class unified interface, User1 and User2 are different objects respectively, and they are related. If the mediator mode is not adopted, the two need to hold references to each other, so the coupling degree between the two is very high. In order to decouple, the Mediator class is introduced to provide unified interface, and MyMediator is its implementation class, which holds instances of User1 and User2 to control User1 and User2. In this way, User1 and User2 objects are independent of each other. They only need to maintain a good relationship with the Mediator, and the rest is maintained by the MyMediator class! Basic implementation:郑氏亦提高声音道：我儿子没有杀人，那人该死。在普林斯顿大学附属医院内，坐镇一位大名鼎鼎的内科医师——格雷戈·豪斯（休·劳瑞 Hugh Laurie 饰），他穿着邋遢随便，手拄拐杖，刚愎自用，锋芒毕露，全然没有人们印象中那类谦和严谨的专业医师的影子。可是在这副令人咋舌的外表之下，却藏着令同行和病患佩服得五体投地的高超医术和丰富学识。豪斯医生治病的手法也独树一帜，他不当面问诊，也绝对不相信病患的道白感受，而完全凭借自己卓越的学识和高超的推理能力解决了诸多疑难杂症。公益剧自2012年播出以来，受到了社会广泛好评，是国内优质的绿色动漫作品。全部剧集按照中央电视台公益广告视频技术制作，以可可小爱一家来演绎“公民道德、生态环保、文明礼仪、品德培育、安全教育”等公益主题。每集通过一个轻松幽默、生动活泼、贴近生活的创意来讲一个公益诉求，播种真善美，传递正能量实习医生格蕾 第九季