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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.马伊萨（约兰达·德·保罗）和莱昂纳多（吉莉·马乔维奇）是一对在感情上面临问题的夫妇。当他们遇到另一对夫妇时，他们的婚姻受到考验。每个人都有不同的梦想和愿望，因为他们调情的想法，改变关系。这个联盟将彻底改变他们的生活和他们作为一对夫妇所拥有的活力。妇女哼了一声，不以为然，突然转头望向丈夫，袖子里什么？啊？什么啊？庞取义一惊。最后，这样一位千金姬，包装好了送给首辅都不算轻的一份礼，来到了杨家院子里。/pest (expulsion)暗恋你的密友，把他变成你爱的人，这是一种对正弦和棕褐色的不舒服的感觉。他们不知道每个人的想法。爱情告白后他们的关系会不会一样？希望这段爱情能用正确的答案来计算。时尚杂志首席记者陆浅浅与老搭档柯基一起来到神秘的西南小镇，被一副古董眼镜所吸引，将其买下后，封印开启，一系列诡怪离奇的事情接踵而至。