在线成人中文字幕

Position and dimension of the center of the hole.陈启说道：看的多了，想的多了，很多东西都是水到渠成的事。杨长帆微微掀开轿车帘布探头往外瞅去，依旧有行人来往，远处甚至还有灯光烟火的样子。Junho是一个即将死去的吸血鬼。为了生存，他需要喝纯净的血液，从而成为一个人。有一天，在搜索www的时候。cc为这纯正的血液，他遇见了敏贤。但是另一个名叫海洙的吸血鬼，知道小君的创伤，导致了民铉和小君浩的争吵。作为一个人过着正常的生活，保护民贤，俊浩将不得不面对什么？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