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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.这样也好，相信你的读者听到这个消息肯定会振奋不已。　　朱惠荣和董凡良的矛盾愈发加剧，董楠和董妮各持己见站在父母不同的立场，董凡良和朱惠荣因无法解除朱惠荣对董凡良的误会而最终导致分手的结局，确信父亲对母亲不忠的董妮支持母亲与父亲分手的决定。　　为了守护大家的笑容，特利迦奥特曼、GUTS-SELECT的队员们以及夏川遥辉/泽塔奥特曼（平野宏周 饰）、伊格尼斯/黑暗特利迦（细贝圭 饰），将一同投身这场光与影的大决战！秋霜姐姐是夜香女，她是我为张家娶的。钟隐点头道：子婴不在了，还有子夜在，难道你不要这个外孙女了？听到这话，李斯的眼神终于多了些神采，是啊。在2×01《One Year In》中，Tom Kirkman担任美国总统已满一年，他致力于重建美国首都，抓住发动灾难性恐怖袭击的幕后黑手。可是当乌克兰民族独立主义者劫持一家俄罗斯空军飞机之后，这位新总统的外交能力在人质危机中将面临终极考验。Paulo Costanzo本季扮演白宫政治主任Lyor Boone，Ben Lawson扮演英国军情六处特工兼Hannah Wells的新爱情对象Damian Rennett，Zoe McLellan扮演白宫顾问兼律师Kendra Daynes，他们均为新的常规演员。