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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 BaiduThe humanoid monster in the former is relatively slow, But the ability to fight is very strong, Not sensitive to puncture attacks, Can resist medium caliber and medium power rifle bullets, In the face of fire, Only when they are completely smashed or their heads are cut off can they be killed. The latter, an unknown creature similar to a "dog", The target is small, Fast speed and evasive ability, After listening to Liu Guangyuan's description, After it can easily cross a large crater with a diameter of 5-6 meters, the impact speed is not weakened, so it can be seen that the unknown creature has extremely strong explosive force, rapid movement, and strong adaptability to complex terrain, but its defense force is poor, and it will die after being hit more times by weaker casualties (such as high-speed steel balls in anti-infantry mines).清末广东陈村有一米商陈裕隆中年得子，取名梦吉。梦吉小时因受雷响惊吓，致使不能说话。邻家金如遂反悔指腹为婚的承诺，并与女银凤迁居省城。后梦吉得盲公出尘子启蒙，恢复聪明伶俐、能言善道的性格，但因锋芒太露，放在私垫不得老师疼爱。反而木讷的陈冠一生得唇红齿白，最得老师欢心，连女扮男装的山城之女杜二妹亦对他倾心，而梦吉又对二妹心存爱慕，一幕幕爱情游戏由是展开……A5.1. 3.5 Olfactory examination.有一天，当欲望的风暴摧毁信仰的支柱，新的纪元便会来临。那时，昆仑山会崩塌成废墟，日月将并悬于天上，阴霾从世界的这一头笼罩到那一头。神祇降临人间，或为了重建新的秩序，或为了成就自己的野心，和凡人联合在一起，开始了战争……It is not that simple to report the case. Many people will not report the case. You need to prepare materials for reporting the case. In addition to the information you printed on the platform, you also need to prepare the following materials:先喝口粥吧。