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Achievements cannot be made alone.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.本剧通过一场突发性的海难事件，把一个个鲜活的剧中人物呈现在观众眼前：一场暴风骤雨、三个不速之客的突然到来，在京岛泛起层层波澜，在一个又一个惊险曲折的经历中，绑架者与被绑架者之间以及他们与纯朴、善良的京岛人发生了一连串既妙趣横生、又委婉动人的情感故事。徐文长轻轻吹了吹像水一样淡的鸡汤，轻抿一口，一脸满足的表情：有不少人出去捕猎了，不知道会不会有收获。此时道士蓝道行亦然上前，看过陆炳神色后低声道：皇上，留不住的。How do foreign students directly enroll in the college entrance examination in Tianjin, and what are the specific procedures? What about the high school examination and the status as a student? How to get into the university and how to deal with the status as a student?