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听到没有救出外孙这样一个沉重的消息，李斯怎么能不愤怒？至于他第一次打了杜殇，一个忠心耿耿，兢兢业业办事的爱将。HOHHO, I'm here然而此时两人都对彼此都产生了情愫，但碍于种种原因，两人却都没有勇气将这份爱意说出口。而另一边周璟顼为了能尽快治好自己的心理疾病，开始更加积极追求费菲，而沐晨为了能够得到海洋的注意也不断接近费菲。不明真相的众人都以为费菲走了桃花运。然而当周璟顼和沐晨的目的逐渐曝光后，费菲也开始陷入前所未有的危机之中，海洋为了救费菲更是不惜一次次用掉自己的穿越机会，最后甚至连生命都可以交付。Eliminate the coupling between the sender of the request (the company that needs to outsource the project) and the receiver (the outsourcing company).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.