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Address: Room 2117, Yingjia Building, 369 Zhongshan South Road, Nanjing (Gate 3, Sanshan Street, Metro Line 1, diagonally opposite the Provincial Communications Department)在毛海峰的带领下，几十人推着车子没走多远便到了藏货处。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-Optimized stability and voice functionality这是，夺命书生反而露出张狂喧嚣的笑声：你老子蠢，你比他更白痴。The second level of otolaryngology should check the health of hearing, smell, teeth, oral cavity, etc., and the elimination rate is not low. Even if only one tooth has been repaired, it is very difficult to pass.堪比杨继盛的酷刑施加在了蓝道行身上，然而蓝道行却表现出了比杨继盛更为强大的意志力。