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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.邵、黄两人合作多年，为一项新产品的科技研发，各自都投入了大量的人力财力。邵国辉得知国内正在推进“一带一路”，决定回国发展。黄英俊不清楚邵国辉回国意图，以为携带机密潜逃，便想尽办法潜入邵家。黄英俊受到邵家人热情的款待，更加深了黄英俊对邵国辉的怀疑，于是计划夺走文件。在计划实施过程中，造成了叫人啼笑皆非的结局。122. X.X.188正当大家为麻由华伤心的时候,鹫羽手持那粒红宝石,说可以满足大家的愿望.于是,在圣诞节时,沙沙美手中抱着一个可爱的女婴……一对情同姐妹的好友嘉仪、白玲，嘉仪奉父母之命与设计师柯振邦订婚，但嘉仪却对振邦一点感觉也没有；在结婚前多嘉仪在情同姐妹的好友白玲全力支持下，离台赴美结识了梁雨成，结婚并育有一女。另一方面留在台湾的白玲在经歷感情受创后决定出国散心顺道探望嘉仪，却在赴美前夕竟意外捡查罗患胃癌。嘉仪接获讯息后即刻返台，见好友因感情心灵受创而今又患有绝症，决心在好友临死前完成她追求一份真爱的心愿；找不到合适人选的她，只有央求自己的丈夫雨成，雨成在无奈下答应，雨成佯装是自己的双胞胎弟弟雨文，在嘉仪的安排及促成下渐渐获得白玲的好感，另一方面对嘉仪仍旧未忘情的振邦，时常出现在嘉仪左右，不禁让雨成怀疑两人旧情復燃，这四个人的感情究竟会如何发展？你外孙心狠手辣，遭报应了。The eldest son of the Lins 02