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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.林伟杰(吕颂贤)大学毕业后，处于待业阶段，偶遇一紫衣女朗马诗婷(吴绮莉)，婷以惊人薪酬请杰在企业当办公室助理，进行一项商业间谍计划。其间杰因入世未深，受尽公司高级职员愚弄。杰之女友亦不满被忽略，向杰提出分手。杰顿时在事业、爱情皆失意。后杰重遇大学同学杨嘉惠(谭文洁)，由于两人均感厌倦办公室政治，遂说服好友陈栋军(刘锡贤)和方敏(施绮莲)等，进行大报复行动。天启将推出《笑傲江湖》游戏？他就不怕毁掉‘笑傲江湖这个牌子吗？面对诸多非议，启明的公关部门很快就给出回应：即将推出的游戏将会是免费的，而且这款游戏绝对质量优良，不会让大家失望。NBC已续订《罪恶黑名单》第三季。　　 枝山因为种种迹象认定秋香就是1. Abnormality caused by system configuration change;