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To apply for the first-level qualification, the second-level qualification certificate and the catalogue of fire protection technical service projects undertaken within three years prior to the date of application shall also be submitted.……唐伯虎中了一日丧命散后，被华夫人关在柴房。国际足球教练在庆功派对中不幸中毒镖毙命，手上的钻石戒指“粉红豹”也随之失踪。谋杀与失窃案迅速成为关注焦点。破案重任落到总探长德雷福斯(凯文·克莱恩 Kevin Kline 饰)肩上。无奈中，他想到了最佳破案人选——探员杰奎斯•克鲁索(史蒂夫·马丁 Steve Martin 饰)。临危受命的克劳索与总探长指派的木讷探员波顿(让·雷诺 Jean Reno 饰)组合成为一对儿“黄金搭档”。克劳索将教练女友歌坛天后仙妮娅(碧昂丝·诺尔斯 Beyoncé Knowles 饰)列为首要的嫌疑对象，谁知调查时却对她一见倾心。菡儿，你……是不是想太远了？那都是我用来糊弄人的。This.command = command;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:This chapter is the last lecture on design patterns. It will talk about the third design pattern-behavioral pattern, with a total of 11 types: policy pattern, template method pattern, observer pattern, iterative sub-pattern, responsibility chain pattern, command pattern, memo pattern, state pattern, visitor pattern, intermediary pattern and interpreter pattern. I have been writing about design patterns for a long time. At last it's halfway through, Writing a blog post is a very time-consuming thing, Because I have to be responsible for the readers, Whether it's graphs, codes, or representations, Everyone hopes to write it as clearly as possible so that readers can understand it. I think both I and the readers hope to see high-quality blog posts come out. Starting from myself, I will stick to it and update it continuously. The continuous motivation comes from the continuous support of readers and friends. I will do my best to write every article well! I hope everyone can give opinions and suggestions continuously and jointly create a perfect blog post!