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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:东北男人王抗美（范伟 饰）在铁路上修火车，干了四十年，退休了。老伴生病住院，王抗美需要钱，退休金不够用，他想方设法再找个活儿干，以缓解经济压力。老伴建议他跟女婿商量，他叫了女儿女婿来吃饭，两人正闹别扭，最后不欢而散。给妻子送完饭菜，老王骑自行车回家，在集市电脑算命，结果很好，算命的姑娘也说老王肥头大耳是福相。令老王稍感欣慰。老王继续为新的营生奔忙，擦皮鞋、蹬人力三轮、做剧团里的独唱演员都在他的考虑之列，可最终都只是设想。还不小心加入传销队伍，被公安抓了个现行。又从游手好闲的儿子口中得知女婿招惹上了第三者，他没有告诉老伴。他去弟弟家里看望老父亲，从父亲口中听说弟弟弟媳做生意需要人手，试探性地问弟媳需不需要五十多岁的当工人，弟媳嫌老，一口拒绝。老父亲说弟弟弟媳沉迷麻将，自己连口热饭也吃不上，王抗美满腹怒气地冲出弟弟家。尽管有诸多不如意，生活仍是在继续。老王忘情地舞蹈，骑着自行车高歌，消失在夜色中……In subsequent interviews, I found the only squad leader at position 142 at that time: Zhao Mingkai, the squad leader is not an officer in the army, Not cadres, But as the backbone of the team, Having the title of "Mother of the Army" is the soul of a class and plays a far more important role in the battle than an ordinary soldier. Therefore, from his perspective, compared with other ordinary soldiers, he has a relatively large depth and breadth. In the interview, I did find many different things from sorting out his memories.In order to facilitate testing and maintenance, there should be one or two grounding clamps (such as single row pins and annular metal pins) on the PCB, and the positions should be convenient for relevant testing.Total quality management mainly includes the establishment of a quality assurance system: in terms of resources, attention should be paid to the quality assurance of raw materials and purchased parts, and suppliers should be carefully selected; In terms of design, the JIT management system requires the designed products to have strong flexibility. In terms of personnel, it emphasizes the quality of people's work and the sense of responsibility for product quality. In the process of processing, attention should be paid to quality process control. Only under the effect of total quality management can we ensure good quality in every link of JIT system, make it try its best to achieve "zero defects" and realize "zero inventory".该剧剧情围绕着彭俏俏和范亮两家人之间展开，讲述了一些时而温馨、时而琐碎、时而让人啼笑皆非的百姓生活。彭俏俏和范亮是一对准备步入结婚殿堂的情侣，无奈未来婆婆战红缨泼辣挑剔，让彭俏俏望而却步。两人虽然克服了双方家庭的障碍结为夫妇，但小两口的计划总是被婆婆过时观念和做法给越俎代庖。彭俏俏的大姑子范婉和她水族馆的员工图丁的恋情则一直不被婆婆认可，让彭俏俏夹在这母女二人中间里外难做人；公公范建国则一直对老伴的做法颇有微词，老两口之间矛盾让彭俏俏左右为难。婚后，在小两口是否搬出去单住、是否要孩子等等鸡毛蒜皮的决定上，一直与婆婆的理念产生着冲突，却不乏温馨收场，体现了一个普通老百姓家庭的生活常态。他是一只穿靴子的猫（安东尼奥·班德拉斯 Antonio Banderas 配音），多年来行侠仗义，行走江湖，剑术高明，胆大卖萌，虽是官兵通缉捉拿的要犯，但从来都无所畏惧，泰然自若。在某个极不友好的小酒馆里，靴猫听说杰克（Billy Bob Thornton 配音）和吉尔 （Amy Sedaris 配音）这对雌雄恶棍拿到了传说中的魔豆，魔豆长出的豆荚直通巨人的宫殿，而那里住着令人垂涎可以下金蛋的鹅。靴猫决定铤而走险劫掠魔豆，却遭到神秘的黑猫阻挠。在黑猫引诱下，他来到一处猫儿聚会的场所，结果意外遇到当年孤儿院的好友矮蛋（Zach Galifianakis 配音），黑猫则是性感的小母猫咪·柔爪（萨尔玛·海耶克 Salma Hayek 配音）。