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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.适龄启蒙，亲子共学。宝宝的成长从很多个第一次开始，第一次学说话、第一次学走路。《超级宝贝JOJO》专为1-3岁宝宝设计，以小宝宝JOJO的成长生活中常见场景趣事吸引宝宝模仿学习，激发宝宝的语言表达与探索欲。帮助宝宝适龄学习与认识世界，支援父母轻松育儿，鼓励家长一起欣赏，陪伴孩子快乐成长。首先是那些军汉们，顿时就鼓起掌来，全忘了谁家成亲也没上过这样一出戏。There are three testersLas Encinas 是西班牙最优秀、门槛最高的学校，也是精英阶层子女就读的去处。在地震震毁一所平民学校后，地方议会决定将学生们分至本地各校中，三个工薪家庭的孩子因此来到这所贵族学校。一无所有的穷孩子遇上应有尽有的富二代，激烈的冲突爆发，最终竟酿成谋杀。那么，罪魁祸首到底是谁呢？如约定好的一般，东南西北，肝脾胃肾同时抱恙。