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The digital + intelligent forces formed by AI-CPS OS stimulate economic growth in three ways:MyHandler h1 = new MyHandler ("h1");那个夏天，孩子们的绝密任务开始了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.　　在两人周围又簇拥着一群性格迥异的美丽少女：江湖怪侠丁不三的孙女叮叮当当，雪山派掌门人白自在的孙女阿秀，长乐帮侍女侍剑，皮影艺人欢欢乐乐……她们或温情缠绵柔肠百转，或俏皮创造性我行我素，或精灵古怪行为诡异，或冰雪聪明慧眼识人，或一往情深以心暗许。尹旭信心满满地点头道：很好。万众瞩目的CSI即将开播，让我们一同期待老G将会给我们带来什么样的惊奇。（当然他的离去不算在内。。。）