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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.老将军神情威严，缓缓道：何须惊慌？人皆有一死。喜欢用游戏来开玩笑的大学生“精神”、喜欢偶像的怪力妹妹精朱莉，俩兄妹不管遇到幸运或不幸的状况都能用外星人般让人捉摸不定的行动制造出让人啼笑皆非的结果。武馆女掌门黄小鱼作误闯娱乐圈，意外成为当红明星袁帆的贴身保镖，正式开始甜喜过招的同居生活。黄小鱼也向袁帆坦白了自己被大热武侠游戏《新斗罗大陆》NPC附身的秘密，开启了一段游戏和现实双线开恋的高甜时光。四个傻小子小龙、小彪，小宝还有小华，因为他们的师傅关系不和，四小子在生活中也处处争相不让，互相捉弄对方。直到遇到聪明可爱的迷糊姐姐和善良可爱的妹妹小霞。迷糊姐姐因为一系列误会而惹上了麻烦，这时候四个小子舍弃前嫌为救姐妹俩，除奸惩恶，欢乐不断笑话百出……Namespace. ? In JavaScript, if a variable is declared outside the top-level function, it becomes globally available directly. As a result, naming conflicts often occur accidentally. Using modular development to encapsulate variables can avoid polluting the global environment.　　但是霗来到宾馆的当晚，经营三流模特儿公司的住客阿龙突然暴毙，然后是昌叔夫妇、妓女苏丝、毒品拆家东尼，无一幸免。前来调查的探员政查出了浅死亡的真相——浅从日本到香港娱乐圈发展，到电视台试镜时以为遇上自己值得爱的男人东尼。谁知道东尼转身用一包白粉的价格把她卖给了别人。浅被强奸，与强奸的人打斗时，整整一个公寓的人，都冷眼旁观。没有一个人出言相劝，没有一个人出来阻止。政最终找到了她的尸体，但是从调查得来的资料看，浅是独生女，根本就没有什么孪生姐妹。