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So the result is? 'Something'就在这时，王陆看见天启发了一条微.博。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.万年之前，仙王牧云因持有诛仙图而遭人暗算，残魂沉睡万年之后，在天运大陆南云帝国有名的“废物牧云”身上觉醒。牧云初醒，就受到了学生妙仙语的刻意刁难，牧云轻松的就化解了妙仙语的陷阱，并举一反三的说出了更多的炼丹技巧，让门外的炼丹大师莫问赏识不已。回到家中，牧云得知了要与秦家小姐秦梦瑶结亲的消息。秦梦瑶寒毒在身，活不过二十岁，结亲不过是为了牧家和秦家的利益。但牧林辰的劝说下，牧云以炼丹为条件，答应了这门亲事。炼出了淬骨丹，牧云的修为有了第一次提升。莫问时常来找牧云请教，而秦时雨一直想请莫问来治疗孙女秦梦瑶。莫问暗示让牧云一试，牧云阴差阳错下唤醒了体内的诛仙图，得知秦梦瑶体内的并非寒毒，而是冰凰神魄。牧云治好了秦梦瑶，冰凰神魄的力量使得秦梦瑶修为突飞猛进。在见识到了牧云的能力后，秦梦瑶对牧云充满了好奇和兴趣，于是成为了北云学院的导师，和牧云教导同一个班级。而追求秦梦瑶不成的东方玉，嫉妒仇恨之心燃起，誓与牧云势不两立。 牧云借着诛仙图突破修为，去北云山脉历练，妙仙语执意同行，途中牧云以一人之力猎杀十几头紫毛猎狼，让妙仙语十分震惊。而被人指派暗杀幕运动柳山四煞一路尾随，趁牧云脱力之机会，纷纷现身准备对牧云下手。傍晚，板栗和秦淼背靠背坐在营寨边缘，望着栅栏外起伏的山峦默然无语。宁绍台参将戚继光亲率大军，庞取义为副将，杨长帆强行挂职参谋，宁绍台联军就此出发。