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Factory Pattern: Factory Pattern is a frequently used pattern. Classes implemented according to Factory Pattern can generate instances of one of a group of classes according to the provided data. Usually, this group of classes has a common abstract parent class and implements the same methods, but these methods perform different operations for different data. First of all, we need to define a base class. Subclasses of this class implement methods in the base class through different methods. Then you need to define a factory class that can generate different subclass instances according to conditions. After getting an instance of a subclass, developers can call methods in the base class regardless of which subclass instance is returned.小娃儿关好厨房门，摸着火折子点着了灯。/v cheer纸醉金迷的上海滩——缘分使然，锦绣与左震相遇了。他教她喝酒，教她跳舞，教她人情世故，终于成功地教她当上了舞女，也终于让她如愿地待在心上人身边。但——情难自禁!他是在腥风血雨里闯荡的帮派大佬，却偏偏喜欢上一心倾慕着他拜把兄弟向英东的女人，这个由他一手调教出来的女人，却让他用生命作出今生最痛苦的抉择.周勃和曹参等人也都一流的良将，自然听得出这些策略的好坏，不由得都心中赞叹。这真的是偶然吗？在各国游客聚集的日本到底会遇到什么样的事件？ “贯穿日本的子弹”超真空电导磁悬浮启动之时，“危险一家人”终于集结！The whole sock body is treated with high elasticity, which ensures the compressibility of the product and makes the product fit more closely with the foot.