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The policy pattern defines a series of algorithms and encapsulates each algorithm so that they can be replaced with each other, and the changes in the algorithms will not affect the customers who use the algorithms. It is necessary to design an interface to provide a unified method for a series of implementation classes. Multiple implementation classes implement the interface, design an abstract class (optional, belonging to auxiliary class), and provide auxiliary functions. The diagram is as follows:So the result is? Goodbye JackAbout HC Branch's Buying and Selling Channel Advertising Service Website Navigation Opinions Complaints Legal Statement Help Center Friendship Link Mobile Phone Extreme Edition该剧以大学生谢永强与农村青年王小蒙爱情生活为主线。　　朱泳腾和刘雪华对戏紧张忘词我们这边与项羽和谈，那尹旭那边……？刘邦想到了另外一件事情，汉国的和谈是门道，有技巧的。姜无甩掉追兵掉进湖里，磁力器带他穿越时空到了2010年，姜无一身古装落在了大街上，姜无来到永王 府，正巧有个剧组在拍摄古装剧，因为他长相酷似大明星于清斌，被当成了演员，一群影迷尾随而至。美女作家叶子也在其中，她长相酷似郡主被姜无当成了郡主。姜无跟着叶子回到家，誓死要保护叶子，叶子无奈收留了他，姜无不小心把叶子租的房子弄着了火，害的叶子无家可归。叶子送姜无到了于清斌家，正巧遇到于清斌的经纪人，他正在为于清斌失踪而发愁。他俩想出一个妙计，用姜无代替于清斌去拍摄广告，一个明朝人和姜无和明星于清斌上演了一出真假明星秀。