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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 Baidu2. Patients can obtain continuity of diagnosis and treatment, even if they have received diagnosis and treatment in different MDT teams or hospitals;全集动画讲述的是白色之心，带着天马之翼打开新时代的大门……这是我们亚特兰蒂斯的传说，创造的时刻已经到来。用它的力量建设我们新的乌托邦。”遵从领袖巴基姆的话，少年海利奥斯拿起了索布莱兹。阿多尼斯星从遥远的宇宙深处向地球飞来。世界各处异常现象频发。大海掀着反常的努浪，一群人坐着快艇乘风破浪，来到古代神殿。First of all, the damage mechanism of romance must be subtraction, that is, attack power minus defense power equals damage. If the defense is higher than the attack. Then the hit damage is 0, and I believe everyone is no stranger to it.　 言劭对美乐由欣赏到日渐动情。面对以风的回心转意、言劭的强烈追求和少茵的从中破坏，最终，以烈与美乐用最感人、最温暖的爱情证明了“真爱无敌”，谱写了一曲穿梭于两岸之间最动听的“爱上査美乐”。《DC明日传奇》(DC's Legends of Tomorrow)是一部由CW电视网筹备推出的第三部系列剧，该剧主要讲述了单单依靠英雄的力量已经不足以应付这样的危局…这个世界需要传奇，拥有时空穿越能力的时空猎手已经见到未来发生的一切，他绝望地想要阻止这一切，为此他只能召集由罪犯和英雄组成的一支超能团队，试图阻止这无法阻挡的灭世威胁。