高清偷拍国产在线视频

秦淼鼓足了劲冲过去，却扑了个空，愕然愣在当地。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.午夜阳光又称永昼，是在地球的两极地区，一日之内，太阳都在地平线以上的现象，即昼长超过24小时。同名电视剧午夜阳光是由海润影视制作有限公司出品的偶像剧，该剧感人至极。Through the study of singleton mode, we are told:章邯躬身道：大王放心，臣已经竭尽全力。•友子的長夜（友阪理惠）