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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.6. One more copy of "subsidy" per month本剧讲述蛇精与人相恋的故事，不过，这个故事并非《白蛇传》，没有水浸金山及士林祭塔，但有蛇精。 剧中的蛇精亦是青蛇和白蛇，两蛇情同姊妹，幻化人形，在“灵雨山庄”中过着逍遥自在的生活。两蛇巧遇穷书生宁丹，被他的翩翩风度吸引，齐齐堕进情网。两蛇先后与宁丹发生关系，亦因此而成为仇敌，青蛇为了成全白蛇，黯然怀着宁丹的骨肉远走高飞。两蛇后来均为宁丹诞下骨肉，又加入黑蝙蝠的作恶，于是高潮迭起，深深吸引着观众追剧情的兴趣，其结局更与一般的神怪片廻异，未至剧终，也难猜度出来。Action: Eyes and mouth narrow into seams.一对十年前在华盛顿联邦银行遭窃而始终下落不明的美金模板，引发澳门黑白两道在回归前的一场世纪末日决战……这还反了天。《萌族酷狗侦探》是中国首部拟人化萌宠、人工智能时代多季剧，是集萌宠、机器人、AI、情感、悬疑等多种元素的都市科幻题材电视剧。该剧讲述了人工智能时代下，会说话的酷狗小八和它的动物加机器人朋友们帮助人类屡破奇案，以及萌宠、机器人和一群90后之间的情感故事。