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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.TelecommunicationsQuestion: What do you think of Huang Dao's change of sweetheart Superman's trousers into skirts, while sad Superman did not have this treatment?前世，她被背叛而死，一朝穿越，孤魂落在了命运相似的少女西凉茉身上，她誓要让伤害她的人付出代价。步步为营，算计所有人，搅得满城风雨，她终爬到了高处。只是为何那恶贯满盈的太监王爷强要娶她？虽然你长得貌若天仙，那也是个太监啊！他们逼着她成了宦妻，那她就当个第一妖夫人，让所有人都不好过。Taking the tightening of Horgos' fiscal and taxation preferential policies as the breakthrough point, this paper deeply analyzes the game of local government tax competition and the complexity and variability of central-local fiscal relations. The reporter obtained the first-hand meeting minutes, local government documents and other materials, and exclusively reported the relevant core information of the "March 6 Meeting of the Commissioner of the Ministry of Finance"-Horgos' preferential tax policies have aroused dissatisfaction from other local governments and regulatory authorities, and may lead to adjustment or tightening of preferential policies. After the report was published, it attracted great media attention. Beijing News, Huaxia Times, Caijing Magazine, Beijing Time and other exclusive information carried out a large number of follow-up reports. The total reading volume of this article on the interface Internet platform reached 485,000, and the reading volume on the interface official WeChat platform exceeded 22,500.嘉靖就此起身，两年之内擒贼，四年之内平海。大明成化十四年，六品推官唐泛和锦衣卫总旗隋州联手，破获侯爷公子遇害悬案，两人一时名声大振，结下情谊。虽名声在外，为官清廉的唐泛仍租房度日，贤德房东张氏却横死密室，看似自杀却疑点重重。一番排查，死者的夫君李漫终被擒获。不久唐泛赴河南查案，获悉北宋帝陵附近多人相继失踪，真凶又是越狱的李漫。一番殊死较量，李漫再次落网，但李漫及其爪牙似乎只是棋子。随即，京城与地方上大案不断，“侍郎夫妇横死案”、“诱拐太子案”，背后均隐现朝堂势力。唐泛与隋州最终揭露真相，一连串案件的幕后推手，正是密谋造反的东厂督主尚铭。其利用所掌握的朝野势力，制造混乱，铲除异己，培植羽翼，意图为造反打下基础。唐泛与隋州合力粉碎了尚铭的阴谋，受到嘉奖。二人继续勤勉为官，持心公正，脚踏实地惩奸除恶，为给百姓一个太平天下而不断努力。