花蝴蝶高清在线观看

青鸾公主大惊，急速闪避后退。The Liskov Substitution Principle (LSP) is one of the basic principles of object-oriented design. The Richter substitution principle says that wherever a base class can appear, subclasses can certainly appear. LSP is the cornerstone of inheritance reuse. Only when derivative classes can replace base classes and the functions of software units are not affected can base classes be truly reused, and derivative classes can also add new behaviors to base classes. The Richter substitution principle is a supplement to the "open-close" principle. The key step to realize the "open-close" principle is abstraction. The inheritance relationship between the base class and the subclass is the concrete realization of abstraction, so the Richter substitution principle is the specification of the concrete steps to realize abstraction. --From Baidu　　陆一平（李悦铭 饰）和佟心雨（龚洁 饰）是一对校园情侣。大学毕业后，佟心雨放弃自己的优势专业和陆一平来到陌生城市打拼，陆一平早出晚归，希望有朝一日能成为制片人，佟心雨则在陈梓浩的公司当文秘维持生计。佟心雨默默承受着生活的压力却依然无法摆脱分手的结局。许久后的一次相亲节目让两人再度重逢，而陈梓浩也出现在了相亲现场……To be honest, I don't know why I have to divide it so carefully.公孙匡和梅子寒看着疯狂的张家人，这才相信小娃儿是真的丢了，因问那个差役，是不是有人追下去了。