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若是县令迎接，请他上船随行就是了。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.东海龙王之女海兰珠来到人间布雨，在龙王庙偶遇侦破命案的沂州府衙捕头陆海笙，海兰珠假装失忆留在陆海笙身边协助查案，却因自己不平凡的龙眼而招来杀身之祸。反派势力为了得到一双不会腐烂的眼睛，对龙眼虎视眈眈，使用连环计让男女主之间误会至深，与此同时，陆府的雨荷也因海兰珠的到来倍感嫉妒，希望赶走她使自己的生活恢复如初，能有机会与陆海笙相守，两人联合对海兰珠制造重重困局。最终海兰珠究竟能否拿回自己的龙眼？两人的情感又如何在危机四伏中破局呢？四九年元旦，乔智才正打算在狱中实施越狱计划时，却被当局释放。他拎着一只皮箱，要去找当年陷害他的老姜算账，却没想到在火车站，意外撞到从解放区回乡祭悼亡夫的黄俪文。二人在离开时，彼此把皮箱拎错了。黄俪文的皮箱中有重要的电台，须转交我党地下组织。为此，她在中产阶级社区镇宁邨入住，不仅意外与家人重逢，而且和善良正直、充满小市民智慧的乔智才结识。两人不断被卷入危险可怕的风波，但凭借聪明和果敢一次次死里逃生。二人在与保密局的周旋斗争中磨练技能、磨砺心智，从毫无地下工作经验的菜鸟，逐渐成长为坚强可敬的共产党人；黄俪文与乔智才也在乱世中守望相助，慢慢穿透彼此心防，最终体悟爱与信仰的真谛。想必周芷若让张无忌答应她一件事，那件事肯定不是简单，也许大结局会再起波澜也说不定。1. In the process of movement and change of things, some features appear repeatedly many times, and the time taken for them to appear twice in a row is called "cycle". Periods are divided into mathematical cycles, chemical cycles, physical cycles, biological cycles, economic cycles and other types.方才让他们兄妹歇息去了。