Step 3: Learn knowledge
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:
CW已续订《邪恶力量》第十二季。
In other words, scarcity will capture a person's brain.
《降灵曲》由文青神作《曾经．爱是唯一》的製片亲自操刀，协同爱尔兰新锐导演连恩盖文（Liam Gavin），跨界呈献邪气逼人的恐怖新作。
美国知名影评网站烂蕃茄89％高分好评推荐；2017葡萄牙Fantasporto奇幻影展最佳导演、最佳女演员双料大奖；2016西班牙锡切斯奇幻影展新视野奖最佳影片；2016澳洲怪物电影节（Monster Fest）最佳摄影、最佳配乐。
痛失爱子的母亲苏菲亚，亟欲与她遭到谋杀的儿子沟通，便求助于反社会又酗酒的神祕仪式专家约瑟夫。约瑟夫禁不起苏菲亚的苦苦哀求，只好勉为其难地为这位哀痛的母亲降灵。他们两人将自身隔绝在北威尔斯一处杳无人烟的房屋中展开为期半年的严酷黑暗仪式，将身心逼到崩溃的临界点，藉此撕裂通往异界的路径……。
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一声长鸣山间响起，连天的羽箭从两边的山上飞来，靠近山壁的闽越军最先遭殃。
看来真的是老天眷顾啊，陈平到来对自己而言，无疑是如虎添翼，很多发愁的事情也都能迎刃而解了。
Abnormal name: Bleeding
“ HiGH＆LOW”团队新项目启动！ 片田凉太，佐野怜（Reo Sano），川村优马（Yuma Kawamura），吉野北人（Kitato Yoshino）等。
Political Conditions for Civil Aviation Pilots to Recruit;
他带了子婴前来？范增听到之后，心念一动，冷笑一声。
该剧是《重启之极海听雷》的IP人物番外短剧，由南派三叔原著改编，讲述了《重启》中刘丧、王盟祖先刘浅墨和南门灯海的探案故事。
影片讲述了特勤陈子默在执行任务的时候发现自己的恋人邓潇潇的身份十分可疑，就在他要调查清楚此事的时候意外频发，恋人的意外死亡，朋友的出卖，同事的怀疑让他身陷囹圄。陈子默并不知道，所有的意外都是为了他的特殊身份而编制的一个大网。陈子默背负各种压力成为了一位孤胆英雄只身对抗幕后的黑手。
美丽人妻瓦内萨是一个步入中年的女人。在她看似平静的生活之下却遭受着前任——一个以自杀结束生命的男人阴魂不散地骚扰。
再婚后，她有了继子贾斯汀——一个被从精神病院释放不久的男孩，而起因是他声称在四年前见到过父亲头部中弹倒地的尸体……如今他被释放回家，并将在他的25岁生日上继承其父亲所有的财产。然而，瓦内萨和她的新任小男友却无法接受这个现实，他们要阻止贾斯汀获得这份遗产，事件由此变得愈加错综复杂
What you are watching now is the feature film "A Suspicious Employee" starring Liu Shengfan allow Charge into Dongri. You may also like: Eight and a Half Women, Happy Neighbors, Endless, Blue Boudoir Surprises, Tom Jones.
Using the CPS2 simulator shown in the following figure, all famous works such as Juvenile Street Fighter and Dungeons and Dragons were tested and the simulation was perfect.
艾米利（张曼玉 饰）曾经是一个音乐节目主持人，她的丈夫行为先锋不羁，是一个过气的摇滚歌星。他们都嗜毒，丈夫还因为吸毒过量而死。而艾米利则被搜出毒品而被判6个月监禁。因为夫妻一直过着不正常的生活，所以儿子被爷爷奶奶领走抚养，想给他一个清洁的成长环境。 艾米利出狱后，她强烈的想要回儿子的抚养权，然而长辈却没有办法相信艾米利能尽好母亲的责任。为了能和儿子重聚，艾米利找了一份餐馆的工作，努力戒掉毒瘾，让自己成为一个清洁的母亲。正巧此时奶奶患病，爷爷分身乏术，无法照料孙子，这样一来，事情真的可以遂愿么？
This summer vacation, I took part in the "Social Practice Activities for College Students to Go to the Countryside in Summer" organized by the School of Urban Management of Hunan City University. In order to let students better master professional knowledge, Carry forward patriotic enthusiasm, serve the society and the people attentively, let students have all-round contact, understand the situation of poor areas in society and personality, and through investigation, find out the actual problems existing in the area, analyze and make solutions, and experience and comprehend from them to enhance the sense of mission of college students. In order to cultivate good social adaptation potential and strive to train oneself to become a contemporary college student who is beneficial to the society and the people, Secretary Liu Hui, Secretary of the General Party Branch of the Institute of Urban Management, was arranged to be our leading teacher. Under the form of building a new socialist countryside in the whole country, the theme of our activity is "serving the new countryside and building a new home."
