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OCP (Open-Closed Principle) principle emphasizes that a software entity (class, function, module, etc.) should be open to extension and closed to modification. That is, every time there is a change, the behavior of the existing type should be enhanced by adding new code instead of modifying the original code.方国锋和张汉杰被选入了特种兵训练营，艰苦的训练生活中，两人建立了最为深厚的友谊，但是，在一次打击境外贩毒团伙的行动中，搏斗之下，危机渐起……According to the basic structure of the code above, TeaAndMilkGirl is a sent object (here is milk tea sister); Ceo is the object of giving gifts. He has preserved the attribute of milk tea sister and has his own privileged method. SendMarriageRing is such a method of giving gifts to milk tea sister. Then he wants to finish the matter through his agent, so he needs to create an agent model of economic man, named ProxyObj;. The main thing he does is, Give the gift given to him by the ceo to the ceo's lover, Therefore, the object also needs to save the ceo lover's object as its own attribute, and also needs a privileged method sendGift, which is to give gifts. Therefore, the ontology object can be instantiated in this method. The ontology object here is the ceo sending flowers. Therefore, it is necessary to instantiate the ontology object and call the ontology object's method (sendMarriageRing).Online work classes: financing is frequent and the curriculum system has not been completed.小说家尹熙因为找不到新鲜素材，眼见走进创作危机，从现在越南生活的旧友徐英口中得知“muoi”的传说后，尹熙决定以该传说为核心展开新的小说创作，然而因为前一部小说影射了徐英，且有许多不实之言，尹熙去越南之前内心忐忑。徐英的变化和热情令尹熙大为吃惊，但与徐英交流时的不自然并没影响到她对“muoi”的热情，然而在更加投入地搜集相关的工作时，种种不可思议的怪事开始发生，尹熙渐渐觉得，眼前的徐英是被“抽象画中的越南少女”附了体的。Therefore, he adheres to the style of having no face in front of interests and regards children as bargaining chips in divorce: he thinks that robbing children is tantamount to obtaining more benefits.背景设定在一个平均水准酒店中的104号房间，剧集将讲述每集该房间的不同房客，他们形形色色的故事。