美艳人妻老师的呻吟声

不知这儿子到底算谁家人。处于这样的境地，如何发展壮大。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　　去年九月份，《好莱坞报道》称《恶魔岛》描述的是「历史上最神秘、最臭名昭著的监狱：阿尔卡特拉斯」。几个月之后，《好莱坞报道》对该剧的描述又改成「一群阿尔卡特拉斯监狱的囚犯和狱警50年前神秘失踪并在当代出现，联邦调查局派人追踪他们的下落并调查整个事件的真相」。郑氏看着这班小辈，忽然道：我说一句话，你们不要嫌烦。Head and Shoulder, Top, Bottom三人无声交流，外人再看不出。