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咳咳……哈哈…好好笑……尹文倩一边笑着，一边把呛在喉咙里的零食吐出去。筹备了两年之久、以20世纪初的山东青岛为历史背景的传奇巨制《跑马场》，将于今年10月16日在青岛、横店先后开拍。项羽来回踱步之后，说道：这样，三更整军，拂晓前发起进攻。古今女子差别待遇甚大，不差的是女子永远为情所困。一百年前如此，今日亦如此，身为女人，是原罪、是宿命、还是爱恨情仇的始作俑者。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.