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　　尽管变成美女是陈美的梦想，可是，以这种方式来完成自己的心愿，陈美总觉得自己的自尊心颇受打击。在这种心态下，她与这一选题的负责人，“SHOW”杂志的主编林敏谦开始不断地产生矛盾。5.1 The syntax is as follows:5-Fruit FructusIn 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.远古时期，正义的魔弹战士们为了世界的和平，早已开始和邪恶的魔物对抗，在双方实力平分秋色之下，魔弹战士失去了能量，而魔物的大魔王幽缘魔魂则化成原始的卵。那个邪恶的卵经过了几个世纪仍旧孕酿着复仇的杀机，新一代的魔弹战士将继承先人的遗志，继续为人类的和平奋斗。The Way to Build Tencent Aegis System飞狼第一季