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With that, Mary smiled a few times, as if to cheer herself up.In real life, China's income tax is divided into enterprise income tax, foreign-invested enterprises or foreign-invested enterprises income tax and personal income tax. For these three types of income tax, each is calculated in a different way. Personal income tax has a personal income tax calculation method, while enterprise income tax has its corresponding calculation method. If we do not adopt the policy mode to realize such a requirement, we will define an income tax class, which has an attribute to identify the type of income tax and a CalculateTax () method to calculate the tax. In this method, we need to judge the tax type and calculate the income tax for different tax types through if-else statements. Such an implementation can indeed solve this scenario, but such a design is not conducive to expansion. If the system needs to add an income tax in the later period, it has to go back and modify the CalculateTax method to add an additional judgment statement, which clearly violates the principle of "open-closed". At this time, we can consider using the strategic mode to solve this problem. Since the tax method is the changing part of this scenario, we can naturally think of abstracting the tax method at this time, which is also the essence of the implementation of the strategic mode.该剧以伊豆国豪族北条时政的次子、镰仓幕府第2代执权北条义时成为日本实际执政者的故事。该剧得名于镰仓幕府设置的十三人合议制。军汉们平日虽然军纪整肃，却也都是热血汉子，而寨子里的壮汉更是粗豪爽朗，两下相遇，很快就融在一处，笑闹声冲天而起。故事是从一个离奇的婚礼开始：大明年间，秀丽的江南蒋州，孟大学士才貌绝世的女儿，孟丽君要出嫁了。她要嫁的是豪门皇亲刘捷的儿子，刘奎壁。可本该是喜上眉梢的新娘，却泪流满面，麻衣素服，这究竟是为了什么……　　事业爱情双收的错儿，并没有忘记自己的家乡，归乡办厂、办福利事业。Step 3: iPhone Enters DFU Mode Key Operation Comes!