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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.翘儿已经开始害怕了，这么多钱……会不会遭报应啊。2. SSL flood attackPrepare and/or agree with the MDT Coordinator on the agenda of the MDT meeting;该剧以文学艺术手法再现了清河地区抗日武装起义的峥嵘战史，描写了性格坚毅的长山中学校长马耀南在日本入侵中国的民族危亡时刻，毅然投笔从戎，与侠肝义胆的二弟马晓云和内敛忠厚的三弟马天民自发组织当地师生和有志百姓成立抗日武装，在中国共产党的领导和帮助下，在一次次与日本侵略者英勇无畏的战斗中，队伍一步步发展壮大，从一支“大褂子军”逐步成长为我党清河地区纪律严明、作战英勇的抗日中坚力量——八路军山东纵队第三支队。马氏三兄弟也在战争的磨砺中成长为优秀的将领，被当地老百姓亲切地称为“一马三司令”。在与日寇艰苦卓绝的长期斗争中，马氏三兄弟在抗战胜利前全部壮烈牺牲，以身殉国，他们的名字和英雄事迹将永远铭刻在人民的心中。4. After completing the selection stage, the players will immediately enter the preparation stage in the game scene. This stage cannot cause damage to other players. All players will be distributed in multiple areas in the scene. In this stage, the players can know in advance and discuss with their teammates the tactics and strategies of the birth selection stage.王晓安直爽女编剧|性格直爽、有点鲁莽，为人仗义，会玩会吃，练就一手好厨艺的焦虑女编剧。赫枫游戏公司副总，滑雪大神，长相帅气，风度翩翩，内心闷骚，注重形象，追求完美。林津津是一名演员，也是个重度公主病患者，喜欢被人追捧，自我为中心。叶楠某雪具店老板，喜欢 王晓安，林津津的 出现改变了风向，最终在王晓安和众多雪友的鼓励支持下，敞开心扉将林津津变为雪具店老板娘。