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All these parts contain the header from the original IP packet and an offset field to identify which bytes contained therein come from the original packet. With this information, in the event of a network outage, the damaged ordinary data packets can be reassembled at the destination.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警备总部派员到校，包括张明晖在内的所有读书会成员皆被拘捕，有的被就地正法，有的死于刑求，连借储藏室钥匙给读书会的工友也被虐杀。张明晖在临刑前嘱咐魏仲廷要活下去，因为自由终会来临。之后张明晖被依叛乱罪枪决，魏仲廷听从建议，招供以保住性命；方芮欣则因愧疚难耐，在礼堂舞台上自缢身亡，以死向枉死孤魂谢罪。第四季的剧情从尼尔在第三季季终时的逃亡开始。正当FBI总部对尼尔的搜索行动因为一个对尼尔穷追不舍的探员（麦凯·费弗，Mekhi Phifer客串演出）而不断升温之时，彼得也离开了FBI，去寻找尼尔。Basic Match Criteria:姜贞羽醉酒后遇到坏人，逃离过程中从楼上掉下，正好掉进了夜少的房间，酒后神志不清的姜贞羽推倒了夜少，一场相爱相杀的恋情就此展开。According to Mei Xiangrong, the "Charming Card" program is mainly embodied in three aspects. The first is the Brand City Plan, "Charming China City" and the City Alliance have opened up the brand promotion of the city. CCTV has provided a "media + industry" urban development platform, while "Charming Card" has inserted the wings of the Internet into the development of the cultural and tourism industry. The second is the brand scenic spot plan. We hope to directly connect the scenic spots of the city brand with the "Charm Card" on the basis of the platform of "Charm Card". The third is the brand establishment plan of Charming China City. In the future, we can rely on the "Charming Card" to let the city's characteristic agricultural products really come to the city and go to the dining table.