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Author: Mutual Gold and InvestmentDuan Jia refers to 100 points of positive value, Duan Jia refers to "skill damage" +30%, 100 points of value, Duan Jia refers to "skill damage" +30%. (It's a pity that it's hard to get Zheng and Juan.)史诗大剧讲述了“ 两弹一星”及其信念 ﹐记录了贫困经济条件、薄弱的技术基础和艰苦的工作条件下﹐60年代的科学家们以惊人的智慧与毅力﹐创造出“两弹一星”的民族奇迹。泥鳅奶奶怒道：就是。…,被这样的人分了全力，田荣怎么会愿意呢？堂堂的齐国广大国土变成胶东王那一隅之地他如何会心甘情愿？试问天下间无论是谁的利益受到侵犯，能够忍气吞声？尤其是到了诸侯王这个层次，损失倒是国土和实力，甚至是身家xìng命。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.He said: "The world is not ready yet."