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.
The observer mode defines a one-to-many dependency relationship, allowing multiple observer objects to monitor a certain topic object at the same time. When the state of this topic object changes, all observer objects will be notified so that they can automatically update their behaviors. The specific structure diagram is as follows:
今天，是天启发布新书的日子。
Update to the latest version that supports 6.1. 0;
A PLASTIC OCEAN begins when journalist Craig Leeson, searching for the elusive blue whale, discovers plastic waste in what should be pristine ocean. In this adventure documentary, Craig teams up with free diver Tanya Streeter and an international team of scientists and researchers, and they travel to twenty locations around the world over the next four years to explore the fragile state of our oceans, uncover alarming truths about plastic pollution, and reveal working solutions that can be put into immediate effect
Les pensees de La Tour Carnet
Is the peculiar smell of car air conditioner harmful to human body?
在未来世界里，以希特为首的一群毫无环保意识的人，为满足自己的贪欲，过度地使用高科技和自然资源，自然环境的恶化，导致无数动物陷入濒临灭绝的境地，甚至危及人类的生存安全。
(未完待续……) show_style();。
才开始时候，顾小玉还会尽量联系作者，询问他们是不是遇到了困难，苦口婆心的劝他们要好好更新。
大婶一边下馄饨一边对他们笑道：能吃是福气。
在巴西的一个养牛场中，青少年因接吻传播的传染病爆发而受到恐慌。
详
何霆又阴沉沉地静默半响，才宣布不再处罚卫江，然后留下顾涧处理军务，就带着一帮人呼啦啦转身离去
USA新剧《黑客军团》提前在网络放出首播集并且大受好评，使得该剧在正式播出之前提前获得了第二季的续订。
乱世谍影、疑雾重重、步步杀机；孤胆英雄、潜入敌后、虎口拔牙。谨以以剧纪念抗日战争胜利而牺牲的敌后的无名英雄们！满州，日本关东军情报部内先后潜入几批人，一时枪声大作，硝烟过后，日军发现藏于密室的机密档案已消失……而此时装机密文件的黑箱子却在几个黑衣人手中爆炸，日本特务机关头子藤田大佐面带微笑地布置追捕行动，经过此次周密的诱饵行动，几利将各方面驻满州的地下组织/间谍机关一网打尽，为军部即将执行的计划铺平了道路。原来日本军部准备在满州策划一个极为机密、重要的工程《松北工程》，并派出松桥正雄博士前往哈尔泊考察并制订此项工程各国的情报机关、国民党的特务机关都对此虎视眈眈，我地下党组织派李炎当任满州省委行动队队长，主持满州的工作，由于松桥的好色，潜伏在俄国妓女家里的我地下党特工孙嫂侦察到他的行踪，可就在行动队要对松桥下手时，发现他已经死在列车上……松桥的死震惊日本关东军军部，责令藤田尽快破案，在搜捕过程中，李炎意外地见到青年时期的恋人，可她现在的身份却是日军情报部的菊地美代少佐……
还没有进门，房间里便传出了爽朗的笑声。
一个名叫Lin（伊琳）的女孩几经努力后成为一名空姐，认识了飞行员In（家英）和Ning（浩宁）。Lin工作非常出色，受到领导的认可，却招来其他空姐的嫉妒。Ning是一个有名的花花公子，对Lin一见钟情，Lin却只对已有老婆的In有好感。Ning得知后非常不爽，想法让Lin对In产生误会，然后乘虚而入得到Lin。In非常喜欢Lin，于是和老婆离婚，当他拿着离婚书去找Lin时，Lin已经怀了Ning的孩子，只能与其结婚。婚后的Ning仍很花心，搭上了空姐Cherry（雅丽）。Cherry怀孕后住进了Ning家，Lin此时再次怀孕，不幸在与丈夫的争吵中流产。至此Lin下定决心与Ning离婚，和爱她的In走到一起……
本剧主要讲述的是百年企业金玉堂的掌上明珠张涵雁，幼年时因受姐姐刘采凡的妒忌而被姐姐遗弃。被养父母收留后，天使流落人间，她却从未对自己身世有过半点怀疑。或许冥冥中自有定数，一切都因遇到失忆富二代王易男而改变，涵雁逐渐知晓了自己的身世。长大后发现涵雁就是当年的小毓萍，采凡害怕自己拥有的一切被夺走，因此联合语天一并阻挠她认祖归宗。但是最后张涵雁与易男有情人终成眷属的同时，也认祖归宗，并与姐姐化敌为友，一笑泯恩仇。
我知道，影视学院花费大，所以我打了好几份工。
