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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.电影改编自《华尔街日报》战地记者丹尼尔•珀尔的妻子所写的回忆录。丹尼尔（丹·福特曼 Dan Futterman饰）前往巴基斯坦调查报道一桩恐怖分子的新闻，却不幸遭到绑架，不久后惨遭杀害。妻子玛林娜（安吉丽娜·朱莉 Angelina Jolie饰）却一直在祈求丈夫能平安归来，寻找丈夫的信念一直支撑着这个已有着身孕的准妈妈。(1) The author of this novel: Xiaoyao de's latest masterpiece: Death Homework, uploaded by female literature netizens!When making exposure compensation, if the photo is too dark, the exposure value should be increased. Every 1.0 increase in the exposure value is equivalent to doubling the amount of light ingested. If the photo is too bright, the exposure value should be reduced. Every 1.0 decrease in the exposure value is equivalent to doubling the amount of light ingested.…,他真的能够带领大军出巴蜀？樊哙愕然站在原地，有些不能相信自己的耳朵。A5 Ear, true throat and oral cavity任天为舞而生。他是个孤儿，从小开始流浪，而他流浪的路则是跟着艺人艾仁在街头跳舞——当时没人看得懂的街舞。这一舞，任天从懵懂少年舞到长大成人。过依亭的最后一个月时，依亭却神秘地消失了。这让任天开始了长达两年的苦苦寻找。 　　在寻找爱人的道路上，他仍然以舞蹈宣泄自己的情感。他以跳街舞为生，在迪厅领舞，并和朋友宇鹏开了一个街舞培训班。 　　一天，熟悉的面孔终于出现，却对任天异常冷漠，如同路人。任天想尽办法走近这个叫作夏雪的孤女，眼前这个柔弱无依的女孩和故人的身影交织在一起，任天和夏雪相爱了。 　　宇鹏也与开朗纯真的可儿邂逅相爱。 　　夏雪生父的出现改变了他们的生活。季行，这个呼风唤雨的财团董事长不仅让任天认识到夏雪的确不是依亭，也让任天感到舞者的身份是会遭到歧视的。为了证明自己的实力，任天苦练舞技，终于与著名唱片公司签约，一舞成名，赢得了季行的默许。