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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.为争取一个出国深造的名额，姜妍（宋佳 饰）与博士生肖琳（阿斯菇 饰）陷入一场不光彩的竞争，在献身导师刘枫（石凉 饰）被未婚夫吴征（朱宏嘉 饰）发现后，她失手将其杀死，并将尸体埋匿家中。从此，姜妍被一种无法摆脱的梦魇所笼罩。姜妍发现自已怀孕后找导师求解，导师竟让和他关系暧昧的肖琳照顾自己。姜妍不想让肖琳知道自己与导师之间的龌龊事，她感觉肖琳眼睛背后还有一双眼睛，到底是什么她也理不出头绪。姜妍偶然发现，原先导师给她安排的研究对象——精神病患者杨大民（刘波 饰）的女儿没有死，而杨大民也不是什么精神病，导师究竟要干什么呢.....子不教，父之过。鲜亮清新的画面、时尚靓丽的演员、曲折动人的爱情故事，加上宁波旖旎迷人的风光，当然故事情节也一波三折，该剧讲述了导游培训中心学员程小鹿（李小璐饰）专喜欢恶作剧，这让老师们非常头疼，培训中心新来了一位老师丁健（常铖饰），他潇洒英俊，还透着几分神秘。万万没想到白天送件遇跳楼，晚上送件竟然目击命案，竟是白天遇见的演讲男！两人被到警局，才知原来是至胜发现有歹徒潜入家中偷窃，趁机制伏，子彤意外发现对方患有恐血症。他愣了会。2018-02-28 15:56:42