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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:How do I develop this? The critical strike rate in position 6, don't think about changing the explosive injury, I will lose the critical strike rate if I change the explosive injury. . .Under centos6.5, the kernel needs to be upgraded to 3.1. The pit I encountered was that although the upgrade was successful, when I started, I was prompted "CPU has been banned" and it was not filled up according to various methods said on the Internet. It was bitter. Probably with my CPU波特兰警局警察Nick Burkhardt（大卫·君图力 David Giuntoli 饰）刚刚被 晋升为命案侦探，正准备在新的工作岗位上大展拳脚，可是他开始见到一些根本不能用言语来解释的可怕景象。Nick的姑姑Marie向Nick透露了一个惊天秘密，Nick的生活从此改变。Marie称Burkhardt家族的祖先曾隶属于一个猎人集团，他们的统一代号为“格林”。这个世界中存在大量的超自然生物，它们试图侵占世界、毁灭人类，而“格林”的任务就是阻止它们的阴谋。当Nick对家族背景有了更多了解后，越来越意识到自己对“格林”的义务责无旁贷。烧锅屯的村民连续十年拖欠国家税款，而且拒绝干部进村，村民在村头挂了一口钟，每当上级派干部来，钟声便响起，村民闻声而动，阻拦干部进村……However, due to the consideration of user experience, the website cannot add verification codes to all operations.谁欺负你了，我去找他算账。