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The essence of these 23 design patterns is the practical application of object-oriented design principles, and it is a full understanding of the encapsulation, inheritance and polymorphism of classes, as well as the association and combination of classes.白发老者惊讶道：怎么？哪里不对。In the second season of "Charming China City", it will continue to select 32 cities with the most characteristics and vitality in China, and will lead the competition team with city leaders to show the unique culture and charm of the city through different forms such as creativity, science and technology, culture and intangible cultural heritage. Thirty-two cities passed two rounds of competition, and the 2018 "Top Ten Charming Cities", "Outstanding Charming Cities" and "Charming Cities" were jointly voted by the guest group and the audience.吕馨早就看过了，而且她看的还不止这些，接下来的几章，她都在吕文心的办公室中看过了。林海也算是天启的忠实读者，现在网上连载的《寻秦记》，他也相当喜欢。在转运罪犯的过程中，一向深得上级器重的武警某部猎豹突击队大队长刘闯，忽然背叛，打伤战友，协同重犯老五潜逃。此事件引起轩然大波。一路逃亡的过程中，从西北到江边，从长江到沿海，刘闯和老五不但面对我公安、武警部门的缉拿，还与老五敌对的某犯罪集团杀手展开激战。最终，刘闯凭借自己超人的胆识和强大的战斗力，取得了老五的信任，将他带上贩毒集团头目老七所在的远洋货轮。最终，刘闯与早已埋伏的猎豹突击队里应外合，发动突袭，将这一犯罪团伙一网打尽，并捣毁了该集团在中国大陆的所有秘密网点。刘闯凭借本次任务出色的表现，获得了立功勋章，同时也接到上级命令，担任新组建的“猎豹”反恐突击队队长，担负更加重要的国家级反恐使命。