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:
Time relays are divided into two types: on-time delay type and off-time delay type, and their symbols are shown in the following figure. For the power-on delay type time relay, when the coil is powered on, the power-on delay type contact acts after the delay time (the normally closed contact is opened and the normally open contact is closed), and the contact immediately returns to normal after the coil is powered off; For the power-off delay type time relay, when the coil is powered on, the power-off delay type contact acts immediately (the normally closed contact is opened and the normally open contact is closed). After the coil is powered off, the contact will not return to normal until the delay time is passed.
《紧急救命》第二季再开。上一季着重讲他们各自的成长，而到了第二季则更多的讲到了医患关系，经历了不少生离死别和无能为力后，成为医生的初衷是否能经受的住现实的打击，且他们对“医生”一词又有了新的认识。
The much-anticipated list of the first batch of competing cities in the second season was officially released (arranged by the initials of the city names): Chongzuo, Dehong, Dazu, Guangyuan, Heihe, Hezhou, Jincheng, Nanchuan, Qingyang, Shangqiu, Yichun, Yushu and Zhaoqing. Representatives of the first batch of competing cities have drawn lots to determine the "competing partners": Henan Shangqiu VS Sichuan Guangyuan, Guangxi Hezhou VS Heilongjiang Yichun, Heilongjiang Heihe VS Guangdong Zhaoqing, Qinghai Yushu VS Gansu Qingyang, Yunnan Dehong VS Chongqing Nanchuan, Chongqing Dazu VS Guangxi Chongzuo, and Shanxi Jincheng's "competing partners" have not yet been released, triggering speculation.
Five: Understanding the Responsibility Chain Model
走私食盐集团首脑徐老虎（刘永饰演）与白寡妇（恬妮饰演），因清官李振彪（白彪饰演）拒不受贿，同时两江总督又责令严缉私盐，徐老虎和白寡妇二人都面临被捕危险。
Machamp Seed 10
四月下旬，青木夫妻带着紫茄进京后，立即着手准备去黄家提亲。
syfy宣布续订#僵尸国度##Z Nation#第五季，2018年10月6日播出。
《兰桐花开》是由孙滔执导，闫学晶、吴京安、何翯、雷恪生领衔主演的农村剧。
State. Method1 ();
本片根据西尾维新的“忘却侦探系列”改编。
The structure diagram of the singleton mode is as follows:
9-1? Restaurant: Create a class named Restaurant whose method __init__ () sets two properties: restaurant_name and cuisine_type. Create a method named describe_restaurant (), where the former prints the above two messages, and a method named open_restaurant (), where the latter prints a message indicating that the restaurant is open.
"It 's a flying bee, Wings are particularly numerous, He was covered in yellow and black, It is the way yellow and black are arranged in such a way. One by one is as big as a slap with an open hand. As soon as it flies, it is a large area. There is a poisonous needle behind the belly, It stings people, One can kill you, My comrades around me, Because there are no fewer than five sacrifices, I remember when the battle was coming to an end, I helped a comrade-in-arms who was stung to squeeze poison out, To squeeze, The wound, which was almost the size of a grain of rice, gushed out a pale yellow 'water', Sprayed directly on my neck, At that time, I felt that my neck was burning, then I felt pain first, then numbness. At the most numbness, my whole head lost consciousness. My neck drooped down and my comrades washed the spilled place several times with river water. It took me a long time to recover. I thought that it was the same when I sprayed it on my body. If I stung it directly into my body, I would basically not live. " Zhang Xiaobo pointed to his neck as he said.
TCP Flood
Droplet theory: Reduce the melting temperature, form droplets and leave the combustion system.
一个聪慧善良的弱女子，不堪凌辱，大义凛然，以身许匪，终报恩仇。正是：国事民事匪事，血雨腥风，自古秦人多壮士；国仇家仇情仇，贤淑女子，以身许匪报恩仇。该剧情节曲折跌宕，别开生面。
