欧美综合婷婷欧美综合五月_欧美综合婷婷欧美综合五月

刘邦说道：此事确有其事，没有在朝堂上正是宣布是寡人的不是。韩信一脸感动地饮酒。生于边疆长于沙场，天生神力武勇过人不拘小节的肃王殿下，满口糙话豪爽洒脱，世人都坚信其为大雍男子楷模真英雄也，其实是女儿身——她大龄未婚父母双亡，有马有房有小弟工作稳定有高薪，就差个如意夫君。/bite (bite)原本平静的江州发生命案。唐老爷在寿宴之上被一个名叫修杰的乐师行刺，但所幸只受到了轻伤，却没想到最后还是难逃厄运，竟在宴会之后离奇死亡.....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