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汉王府，吕雉整个人无jing打采的，尽管她很想振作起来，但一连窜的失败让他看不到一丝希望。Go and see, won't be disappointed!晚清年间的浙江余杭县仓前镇……一日，年轻貌美的小白菜在一家酒楼巧遇帮人写诉状的杨乃武，杨乃武顿为小白菜的美貌吸引，而小白菜又正好租下了杨乃武家的房子。杨乃武怜惜小白菜的身世，让她帮忙整理新书房和做些杂活，以贴补家用。二人朝夕相处，小白菜从此迷上了杨乃武的多才潇洒。这事被丫鬟葛三姑察觉，二人将葛三姑哄住，葛三姑答应守密。小白菜要托付终身，杨乃武许诺等他中举，就帮小白菜与葛小大解除婚约，自己休掉杨詹氏，然后娶她为妻。二人互换信物。小白菜满心欢喜，日夜憧憬，但想到就要与自己的未婚夫葛小大圆房，不免忐忑。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.人挡杀人，佛挡杀佛。正闹着，殿外有人报玄武将军求见。