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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.最近的情节比较温馨，所以大家不用急，原野先攒一阵稿子，等到回京之后，情节紧张的时候，再恢复两更，也会加更的。除了百越之地基本上全都在越王尹旭手中。这时，刘氏也过来，端了个凳子在面前坐下。7600 X 0.5% = 38 points某国外以收买国内腐败高官为经营手段的犯罪团伙。因内部分赃不均，致使该团伙成员佟兵将一份可以致许多国内腐败高官于死地的绝密档案窃走。佟兵欲以高价将此档案卖给内地一犯罪团伙，不想被技高筹的内部犯罪团伙头目，身披集团公司董事长外衣的丁吉常所杀，档案被掠。 佟兵同父异母的哥哥佟凯是一家晚报社的记者，电脑游戏高手。他偶然从佟兵存在他家的游戏光盘里看到了这份密档。并将其中的部分内容告诉了省报政法记者方可……