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.玉米没吃，他终究不忍心。好不容易获得王室认可的Blair（莉顿·梅斯特 Leighton Meester 饰）一方面正燋头烂额地筹备自己和婚礼，一方面又要应付Chuck（爱德·维斯特维克 Ed Westwick 饰）和Dan（佩恩·拜德格雷 Penn Badgley 饰）的示爱。Serena（布蕾克·莱弗利 Blake Lively 饰）在洛杉矶遇到的多年不见的表妹Charlie，并将她带回曼哈顿，却不知道她是冒牌货，并隐藏了一个大秘密。Dan用身边人的故事出版自己小说的《局外人》，成了聚光灯下的焦点，却得罪了所有的朋友。Nate（切斯·克劳福 Chace Crawford 饰）开始在《The NY Spectator》工作，并结识了风韵犹存的Diana，而她似乎知道Chuck母亲的真正身份。在追查的过程中却发现父亲Bart并没有死亡......上东区永远被秘密缠绕，这一次又会带来多大的惊喜？一切都由Gossip Girl来揭晓。魏国人只能郁闷地迁都到平阳，前往位于大河东北角的西魏国。该片是一部以奥运为主题的高清数字电影，通过描写一个业余体校的普通武术教练吴杰（吴樾饰），辛勤培养自己的学生参加奥运会的故事，展示了一个小人物真实而又感人的内心世界，表现了几代武术运动员对中华武术的炽热情感以及对于武术走向奥运会的热烈盼望和艰辛努力。