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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.After the INPUT chain is emptied, there are no rules for the INPUT chain in the filter table, but it can be seen that the default policy of the INPUT chain is ACCEPT, that is, the INPUT chain "releases" all messages sent to the local machine by default, accepts all messages when there are no rules, and releases messages by default when the messages are not matched by any rules.民国初年，被推翻的清廷受民国政府的优待，仍居于深宫，被视为国中之国的“小朝廷”，名士匠人仍以受到“朝廷”的恩宠为荣。 　　影片讲述松鼠奎特（克里斯·韦奇 Chris Wedge 配音）为了追松果，偶然引发了宇宙事件，改变并威胁着冰川时代的世界。为了拯救自己，话唠树懒希德（约翰·雷吉扎莫 John Leguizamo 配音）、猛犸象曼尼（雷·罗马诺 Ray Romano 配音）、剑齿虎迪亚哥（丹尼斯·利瑞 Denis Leary 配音），以及别的动物群族必须离开家园，踏上了他们充满喜剧色彩的冒险旅程，他们来到了充满异国情调的新大陆，并遇到了许多形形色色的新角色。Both the gun cage and the dragon leg are under control.《刁蛮新娘》讲述了一段发生在民国时期上海的传奇故事。出身贫寒的女主角颜小蛮(杨幂饰)因一桩离奇命案而被巡捕房追捕，被迫逃亡的她阴差阳错地进入了上海势力最大的豪门戴家当丫鬟。因看不惯大富人家的骄贵之气和种种繁文褥节，小蛮在戴家闹了不少笑话，还得罪了两位号称“上海滩女皇”的戴家女主人方氏和袁氏(王琳、田丽饰)。不过，方氏和袁氏的两个儿子戴问天(李东学饰演)、戴君涛(孙坚饰演)却都很喜欢小蛮，在他们的保护下，小蛮得以度过不少难关，但她渐渐发现自己身披的命案与戴家有很大关系……　　八姑限房客每天只能用两桶水，做洗熨的上海婆(沈殿霞 饰)率先抗议，众房客支持，加上发仔(岳华 饰)、阿福(何守信 饰)附和，引出许多是非来……