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　　为此，袁晶请来自信满满的私家侦探乔凉调查骚扰者，而这一切似乎比预想的难得多。Five fairies小葱师姐，是不是这样？小葱微笑道：是。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.B. Women: Individual (70m) and Team (70m) in the knockout stages of the Olympics.周婆子也就罢了——乡下人，见惯了的——那孙夫人也不嫌臭，纯粹是被秀才女婿的美好向往冲昏了头。