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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.由著名导演于立清执导大型抗日题材剧《血色玫瑰2之女子别动队》讲述的是龙虎山抗日游击支队女子别动 队,如何与日本人进行浴血奋战,并最终粉碎了敌人的细菌战的故事. 1939年抗日战争进入相持阶段, 海报为了有效地消灭和牵制日本特务机关及为日本效命的汉奸势力,以共产党员陆玫为首的别动队深入敌后.根据《史记》的记载，这位穷乡寡妇既不是钢铁大王，也不是盐业巨头，她经营的是丹砂。累计消费积分达3000点就能换到OX食品公司赠送的机器人。这台超努力的小小机器人突然来到不擅长做菜的ＯＬ和独自在异地工作的人身边，它提供的不只是热腾腾的饭菜而已…今天也让某人感受到忍不住会心一笑的幸福。用食物构筑出一篇篇温暖人心的感动故事往人丛中张望半天，大姨子小姨子表姨子，外带一个呼呼大睡的小女娃，就是没有自己的新娘，顿时呆住：没走错门吧？这时，汪氏从外赶了来，疾声道：姑娘们，该走了。他还没反应过来呢，也不知这些大大小小的少年公子都是谁，奇的是还有抱娃儿的。