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After opening the outer package, eh, it looks like an egg package!The process of taking the teacher's qualification certificate is as follows:Cpu shutdown!The front suspension of the new BMW 3 Series is defined as a double ball joint spring shock absorbing strut, which is similar to McPherson in structural form, except that the "Y" shaped lower swing arm suspended by McPherson is replaced by two independent lower control arms, so the steering knuckle can obtain more freedom. In addition, different driving and control effects can be realized by changing the point design of the connecting rod on the steering knuckle.不是天启小说改编，是原创故事。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律政新人王是否能再领风骚，各人生命中的问题又是否能以最真实的面貌去面对？