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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.放梯上人，探子登船，气喘吁吁道：船主，许朝光已降了官府，此地设为南澳所，已是朝廷卫所。面对着不断出现的新型犯罪以及不断演化的新型案件，一群中青年民警为代表的中国刑警们在维护法纪的斗争中侦破一宗宗罪案，深度打击犯罪，破获高科技诈骗，千里缉凶，网上追逃等。通过和罪犯的斗智斗勇，除暴安良，用浑身正气维护百姓安宁，用热血和忠诚捍卫法律的尊严，用生命的音符和刑警的热血谱写着动人的乐章.花艺师、雕塑师和园艺设计师两人一组，共十队展开温馨的花艺对决，看谁能够打造最巨型、最大胆的花园雕塑。若是个女人，怎么也不会不露一点异样吧？林聪也心下忖度：这个胡钧，不会发现了什么，故意试探她吧？两人各怀心事，回到崖壁旁的空地。哦，我知道了。1. Download Aisi Assistant and itunes