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In terms of financing, there are not many companies that have obtained financing for children's thinking ability interactive game APP, and the rounds of companies that have obtained financing are also in round a and below.A few days ago, the circle of friends was swept by such a video:黎章这才想起来，匆匆叮嘱了林聪和秦淼几句，就要走。她的目标是，七濑俊一，一个和她在一个班上的男生。Liskov Substitution Principle, LSP (Richter Substitution Principle) means that subclasses must replace their parent types. In other words, in the process of software development, after the subclass replaces the parent class, the behavior of the program is the same. Only when the subclass replaces the parent class and the function of the software is not affected can the parent class be truly reused, and the subclass can also add new behaviors to the parent class. In order to look at an example of violation of LSP principles, the specific code is as follows:绿萝抱着宁儿道喜，范依兰和许负也随即道喜。幸福の選択 浅野ゆう子 江藤　潤