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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.Sustainable win-win cooperationWater spray (water mist) fire extinguishing system刑场之上，李毅是否能逃过一劫？东厂赵忠和锦衣卫纪纲究竟谁能取胜？大喇嘛的阴谋能否得逞，这一切，都是未知•••••5. At the same time, press and hold the volume reduction key on the left side of the mobile phone;　　一位英俊的美国青年艾登怀着理想主义的激情来到西贡，希望参加医疗援助，他的热情打动了托马斯。一直以来，托马斯都小心翼翼地保持着中立态度，仅仅不动声色地观察着，尽到自己新闻报道者的本分。很快他就发现艾登迷上了红，而伦敦的报社总部命令他停止在越南的活动回国。　　故事发生在宾夕法尼亚的Banshee镇，曾经坐过牢的诈骗大师兼飞天大盗lucas（安东尼·斯塔尔 Antony Starr 饰）拿到了Banshee警长的身份，取代他成为了当地执法者。在小镇服役时间最长的警官Brock（马特·索维托 Matt Servitto 饰）本有希望成为警长，而lucas的到来威胁到他的地位。lucas发现他过去的情人Carrie（伊万娜·米利塞维奇 Ivana Milicevic 饰）改名生活在小镇，并嫁给了当地检察官。一方面，lucas用他新的合法身份继续秘密地犯罪，另一方面，暴徒冷血无情的乌克兰黑帮成员兔子先生（本·克劳斯 Ben Cross 饰），15年来一直在追踪lucas和Carrie的下落。但是一切都在lucas进入Banshee镇后变得不一样起来......