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何霆忽然一笑，对黎章等三人道：这位小兄弟的话你们都听见了？黎章等三人急忙站起，抱拳应道：属下听见了。李慕诗的娘竹子是有名的泼辣性子，他爹就算精明，也被媳妇管得死死的。南方的农业发展也并不发展，中原的黄河流域本就开发较早，尹旭这许多的原因，楚国的人口并不甚多。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 Baidu1. You are at the no-judgment point and the tank is stuck. You do not move at all and only have the movement of opening your arms.2. Correspondence Address: No. 2-9, Yuetan North Street, Xicheng District, Beijing 100830, State Medical Security Bureau