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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:Still in sequence, the following is the record of the engagement between position 149 and "living biological weapons":早川猛在大城市里事业顺利，是名年轻有为的摄影师，其兄早川稔则在家乡继承父业，经营一家小加油站。在母亲的周年忌日，猛从东京回到老家探亲，昔日情人智惠子在加油站工作，她感叹当年没跟猛离开。年轻气盛的猛和传统而顽固的父亲动不动就起冲突，而身为大哥的稔却顺从父亲。 　　之后兄弟二人和智惠子去附近溪谷游玩，不料智惠子从古老破旧的吊桥坠下身亡。当时唯一在她身边的稔成了杀人嫌疑犯，猛为了帮助兄长四处奔走，力图证实这是一起意外。然而在开庭过程中，稔突然一反常态……《喋血马帮》:讲述了抗战时期，我国军阀混战，炮火绵绵，老百姓饱受军阀欺压，使百姓生活在水深火热之中，因此，当地许多民众被迫上山落草为寇，打着替天行道的旗号，与军阀为敌，为百姓出头。就在这时，日本帝国主义野心勃勃，利用金钱、美女诱骗军阀军官，趁机展开军事入侵。剧中马帮部队在行进过程中，面临着匪军来势凶猛的“猎杀行动”，军阀官员却左右摇摆，马帮内部经历着“内忧外患”的考验。在这样的复杂形势下，马帮部队还面临一个严重威胁，马帮当家的亲弟弟意外发现，原来采芹一直与自己的哥哥啸山虎私情的人，使他对哥哥产生了仇恨，给匪寇利用，并令警察以多年前一桩绑架案与走私，将啸山虎抓捕起来。这条线索让整个剧情更加的紧张，复杂的马帮、土匪、军阀构成让每个人都各有想法，但他们又对各自的组织绝对效忠，马帮与土匪相互争斗的枪杀场面，使马帮内忧外患究竟是谁，成了全剧最大的看点且贯穿全剧。10-15% of aquatic plants and hidden objects are planted shallowly at the edge of the pond to create an environment for lobsters to inhabit and shell and reduce mutual killing. The influence of water quality on lobster yield cannot be ignored. During the breeding process, the PH value of the pool water is kept between 7.5 and 8.5, and the transparency is 30-40cm. Fresh water should be added frequently, quicklime solution should be splashed regularly, water quality should be adjusted, and diseases and shelling failure should be prevented. 2. Feed feed reasonably. Lobsters will kill each other when hungry and under-fed, so the feeding amount must be sufficient. Lobster feed is animal and plant feed. Plant feeds are wheat, aquatic plants, rapeseed cakes, etc. Animal feeds are miscellaneous fish, miscellaneous meat, livestock viscera, etc. At ordinary times, the feeding time, feeding amount and feeding method are determined according to the habit of lobsters falling in the day and coming out at night and the density of lobsters in the pond. 3. Scientific fishing. Young shrimps can grow to commercial specifications in 60-90 days under the condition of suitable temperature and sufficient feed. The seedlings will be released in March and will be caught in rotation around June, selling large ones and keeping small ones.这些活计本来就该我们做，哪有姑娘做这个的？那媳妇显然不同意她的看法。