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这是搜乐网的一个报道。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这孩子倒也会记，以他爹乡试为时间节点，准确记录了每一次家庭悲剧。10. In this regard, the first seven firearms divisions completed the killing in sequence. Return to the side of the moon mark, talk with her, and let her move on. Until you reach the bridge and talk to him. Help her clean up the little monsters at the bridge head and clean up all of them.一九三七年，“七·七”事变爆发，川军在四川省主席的感召下，请缨出川抗日。这支川军知耻后勇，以“失地不复，决不回川”的决心，以三百万壮士出征，六十万军人伤亡的代价，打出了“无川不成军”的威名。学生连长张抗带领属下官兵随川军北路纵队出征，转战今山西、山东、湖北、湖南等地，在台儿庄大战等重大战役中，与日军展开一系列惊心动魄的殊死搏斗。通过战争的洗礼，张抗与众川军将士结下生死之谊，其与女学生夏之悦的爱情也在血与火的烘托中得以升华。张抗属下士兵杨得贵、王长生、吴天禄、何阴阳、黑娃等人，虽出身不同、性格迥异，但在民族大义的感召下，殊途同归，最终为了掩护张抗脱险，纷纷慷慨就义，谱写了一曲可歌可泣、荡气回肠的英雄赞歌。张焱、范志钦、杨广德、冯旭是四个战友，退伍之后各自在不同岗位上。范志钦是县公安局的副局长，冯旭是当地“旭日矿业”的老板，杨广德是基层派出所的所长，张焱的老伴李玉梅是“旭日矿业”的仓管员。在张焱生日当天，本可以留在家里庆祝，他却参与绑架案的侦破，在他的指挥下，抓获了犯罪嫌疑人。回警局途中，他和徒弟一起不慎把缴获的土枪丢了！虽然在36小时里找到了丢失的枪支，但他由于丢枪问题，受到纪律处分，被撤职后下调到杨广德所在的派出所工作。 张焱到了派出所，刚好遇上警校高材生万山进入派出所工作，并在一系列“大妈丢猫”“邻里狗粪纠纷”“网吧骗子”“抓赌”“离奇失踪”等案件中结下深厚的师徒感情。张焱在派出所里，一边工作，一边深入侦察。他对派出所的繁琐工作既有怨言，也有热情，无论事情大小都能非常出色地完成。在一举破获一起非法集资案，为群众挽回大量财产损失后，公安局决定调张焱回刑警队。但张焱却因为私自外提犯人大强到医院见其母亲最后一面，违反纪律而不得不宣布内退。In this time of gold, three silver and four silver, a friend suddenly solemnly asked me the startup mode and specific application mode of Activity. I also think yes, Ping didn't pay much attention to the result and got stuck at the critical moment. I feel that I should prepare for a rainy day and make a record: