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众人都注视着李敬文，看他如何求小葱。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.该剧以抗战时期的延安为背景展开一系列抗战锄奸的故事。根据抗日战争时期党史机密档案中所描述的中统、军统、日本派遣间谍在延安的秘密特务活动编写，讲述了抗战时期的延安边区保安处处长周劲为了保卫延安以及中央首长的安全，与潜伏的间谍、日军特务、叛徒以及土匪之间斗智斗勇的故事。Public class Plus extensions AbstractCalculator implements ICalculator {在位于特兰斯瓦尼亚某座山顶的一桩阴森古堡内，生活着令周围居民毛骨悚然、谈之色变的传奇人物，他就是著名的吸血怪鸭达寇拉伯爵（戴维·杰森 David Jason 配音）。这个几乎拥有不死之身的怪物一度是所有人的噩梦，可是某天不知道什么原因，达寇拉竟然变成一个不爱吸血、崇尚素食且胆小怯懦的小贵族。"Well-how do you say this? According to the appearance, it should be a dog, but the dog is very ugly. I don't recognize what breed it is, and I have never seen such a fierce dog." Liu Guangyuan said.讲述了一个爱管闲事,平凡的女高中生,通过某一天给自己的复仇笔记软件解决了自己冤屈的事情,明白了家人和朋友的珍贵,自我成..