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BBC与Amazon合拍的6集奇幻喜剧《好兆头 Good Omens》。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.Introduction to Operation of Slow Boiling Machine唐武周年间，边事频仍，连年征战，大周朝国帑虚竭，守边将士军心不宁。狄公自连破幽州、并州、蛇灵、江州等一系列大案后，几经恳请，终于得武皇允准回老家并州修养。但李元芳耿直地向他指出，他没有这等享清福的命。狄仁杰在本次的故事中解决了凉州黑衣社劫军饷案和邗沟大运河官船沉没案。每个人心里都有想要回去，却永远也回不去的那一天。讲金钱