欧美熟妇一区二区视频非会员

谁啊？谁要自立门户啊？这恨不得仰到房顶的声音，准是赵思萍又来了。如今取得这么大的成就，却不能与心爱的人一同分享已经是一种遗憾和折磨，现在刘邦无疑又在伤口上撒了一把盐，让他痛彻心扉。　　年轻的乾隆由于经验不足，往往事与愿违，越想展示自己的才华，越是常常陷入尴尬。而李卫一心想辞官归里，可越想躲越躲不过，还因为他的老辣和老道，将一件件棘手的难事办得滴水不漏，每次帮乾隆保住了面子，于是别人想爬爬不上去的，李卫却想下还死活下不来……此剧主要讲述隐藏了真实身份的天才作曲家姜汉杰和对姜汉杰一见钟情的维他命般活力的女高中生“尹素琳”之间的纯爱故事。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.