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B) Design principles. Many people have listed seven principles, such as single duty principle, opening and closing principle, Richter substitution principle, dependence inversion principle, interface isolation principle, composite reuse principle and Dimit principle. LSP, I elevated it to one of the three cornerstones of the object-oriented paradigm; Single responsibility and interface isolation are mainly used as the principle of responsibility division in object-oriented analysis/OOA, which you can not pay much attention to at this time. Relying on the inversion principle, I throw it away as garbage, because the opening and closing principle or directly "relying on abstract type principle" already contains the essence of relying on the inversion principle, while the dross of relying on the inversion principle is inherited by IoC. Of course, the pullback, I emphasize very much. Therefore, you need to master the abstract dependency principle (OCP), one-way dependency principle (including the learning of callbacks) and the minimum dependency principle (composite reuse principle, Dimit rule).1. Notwithstanding the provisions of Sections I and II of Chapter II, any ship overtaking any other ship shall give way to the overtaking ship.一场激烈而顽强的对峙于警匪间，于两兄弟间轰轰烈烈的展开。所有的恩怨报仇都抵不过正义的力量。 唐山城震遗孤江启文儿时和哥哥被分别收养，彼此再无音讯。二十年后江启文从美国回到永州，决心寻找哥哥，并调查养父的死亡真相。他在养父江裕华故交之子的帮助下，展开了寻亲以及复仇的行动。《你在微笑我却哭了》与电视剧《不要和陌生人说话》一脉相承，反映的都是当前社会中敏感的话题。这次镜头对准的是教育体制中的敏感问题——学生分流。片中展现了“青春对抗”的情绪，一群高中生在矛盾中彷徨的种种片段。沈笑是一名品学兼优的高三学生。正值高考在即，沈笑所在的学校为了提高升学率，公然违反教育部有关规定各学校不得借摸底考试对学生进行分流的，沈笑的同班同学刘国庆等几人因成绩不佳，不甘心被提前宣判“死刑”，就到教务处偷出了试卷，让沈笑帮助做出了标准答案。风波就此而起——同学的自杀、父母的矛盾、学校和老师的不理解、爱情憧憬的破灭和青春期的躁动等等，种种压力、矛盾、纷争一一在高考前爆发，卷入其中的沈笑也因此顿生信任危机，放弃了高考，并意外卷入了贩毒事件……沈笑在经历了一系列挫折后，终于成长起来，放弃了对抗，参加了第二年的高考，并以优异的成绩考上了北京医科大学。他是良民就没有刁民了。Application software is a variety of programs that are user-oriented and written to solve practical problems. It can be written by users themselves or purchased. For example, we often use office software Office XP, drawing software Photoshop, game software Red Alert and so on.郑氏担心地问道：带他去不是添乱么？张槐道：不碍事。