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Hematopoietic system剧中青树经历了四次感情，三次婚姻。第一次的婚姻自然是青树最爱的男人，但他为保护胡杨林牺牲了；第二次的婚姻纯属是一次报复的行为，因为怀疑对方是自己的杀夫仇人所以以身查案，水落石出后，她的这个行为深深地伤害了这个深爱自己男人，结婚的当天黯然离开；第三次为了母亲嫁给了一个发小，从哥哥过渡到丈夫，青树不断地审问自己的内心是否有爱情的种子，最终二人依然未成正果。The above is only a model of "Long En" bicycle, If you need to generate other types of bicycles, Other subclasses can be written. The most important advantage of factory mode is that some of the same methods can be implemented. We can write code in the parent class for these same methods. If we need to implement specific business logic, we can rewrite the parent class's methods in the subclass to implement our own business logic. In terms of professional terms, there are two points: First, weaken the coupling between objects and prevent code duplication. Instantiating a class in a method eliminates repetitive code. Second: Repetitive code can be written in the parent class. Subclasses inherit all member attributes and methods of the parent class. Subclasses only focus on implementing their own business logic.IGMP means Internet Group Management Protocol. This protocol is used to establish and maintain multicast group membership between IP host and its directly adjacent multicast routers, but does not include the dissemination and maintenance of group membership information between multicast routers. This part of the work is completed by each group of broadcast routing protocols. All hosts participating in multicast must implement IGMP.“第一次”是“无论多少次”——。主人，大鹏、小鹏回来复命。The above code is code implemented without proxy mode;