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:
The creepage distance is divided into two grades, and the creepage distance of 300V grade is ≥ 5 mm; Creepage distance of 600V grade ≥ 7mm. The creepage distance is designed for 220V voltage according to 300V grade, and the creepage distance is designed for 380V voltage according to 600V grade. For 220V and 380V high-power parts, character marks are applied to allow cuts in PCB design to meet the requirements of creepage distance.
Residents! Let's unite and act! Let's learn from Ningbo Zhenhai people! Learn from them to pull back the government's more than 50 billion major petrochemical projects from the brink! Let's firmly demand the relocation of the Green Energy Waste Incineration Plant for ourselves, for the sake of our families and for the sake of future generations, and firmly oppose the expansion of the second phase of the Green Energy Waste Incineration Plant!
When a client accesses a server's web service, The client sends a message to the network card, The tcp/ip stack is part of the kernel, Therefore, the client information is transferred to the web service in user space through the kernel's TCP protocol, At this time, the destination destination of the client message is on the socket (IP: Port) that the web service is listening for. When a web service needs to respond to a client request, The destination destination of the response message sent by the web service is the client, At this time, The IP and port that the web service listens on becomes the origin instead, As we said, Netfilter is the real firewall, It is part of the kernel, Therefore, if we want the firewall to achieve the goal of "fire prevention", You need to set up checkpoints in the kernel. All incoming and outgoing messages have to pass through these checkpoints. After checking, those that meet the release conditions can be released, while those that meet the blocking conditions need to be blocked. As a result, input checkpoints and output checkpoints appear. These checkpoints are not called "checkpoints" but "chains" in iptables.
七十余艘福船将主岛包围，俞大猷下达了最终的死期，天黑之前投降，否则格杀勿论。
浦卞不到三十岁就在大型公关公司光芒四射，三十三岁就做到总监级别，房车兼备，然而在三十六岁的时候，却迎来人生最大的阴霾——事业破产，妻子离他而去。走投无路的他，为了得到下一季广告的合约，击败竞争对手丁羽，成功策划了广告公司老总牵走相亲节目女神柳林。然而之后阴错阳差，使得浦卞和丁羽、柳林、苏杭杭，四个人成立了情感委托公司，专门帮助别人解决情感问题。
外表放浪不羁实则才智机敏的刑警冯浪，在多次死亡案件中深挖出了几年前药厂惊天阴谋事件，冯浪与青年女警花范芸、马队所在的刑侦二队，为了查明真相，与邪恶势力上演了一次次屏气促息的周旋，侦查过程环环相扣案件扑朔迷离，精妙的布局、丝丝入扣的案情剖析、精彩绝伦的剧情反转，将为观众上演一场悬疑推理的顶级对决。
Hollow filter cotton is white and clean before it is used.
Here are the steps for configuring iptables-service in centos7
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难怪戚懿儿疑惑自己身份，原因就在于此。
该片讲述了气候变化导致某国东部小镇山体滑坡，一种远古细菌开始复苏，护士苏萍和丈夫林栋在当地旅游团聚与多人被埋地下废墟。苏萍在拯救丈夫的同时保护儿童，经历药品、食物危机及人性考验，最终战胜危机。
Editor's Note: This article is transferred from WeChat's public number "KMCenter for Knowledge Management" (KMCenter). The author is Tian Zhigang, a well-known knowledge management expert, who is the author of "Your Knowledge Needs Management". The content of this article is the material of "How to Become an Expert". 36 Krypton is authorize to forward.
1936年，日寇紧逼华北。十年前因枪杀青岛兴安帮主薛安泰成名的九龙商会少爷韩志杰，因母亲被日舰炸死而对日仇视；他出其不意夺回被日商藤泽强占的码头，本想借码头贩毒走私的藤泽视韩志杰为眼中钉。薛安泰遗女萧岚忍辱接近韩志杰想报父仇，机缘巧合却与韩志杰相恋；九龙商会大佬曾念安因利要杀韩志杰；韩志杰的好兄弟厉晨星因萧岚也与其反目。韩志杰陷入重重杀局，九死一生，萧岚舍生忘死帮他化险为夷。不料在韩志杰和萧岚新婚之时，韩家却遭藤泽灭门，并嫁祸萧岚，有情人反目成仇。七七事变爆发，韩志杰和萧岚在中共的引导下，放下恩怨，投身抗日洪流。
1 ", Monitoring: Sentinel will constantly check whether your Master and Slave are functioning properly.
李天洋和郑月两位年轻“小炮儿”在执行神秘任务时失败，惹怒老大闫老板，开始了亡命天涯的故事。在找寻货物的过程中，郑月偶遇发小并帮发小找回了失踪多时的男朋友。同时，郑月发现了货物的秘密并明白如果不逃离这个地方就会丧失性命。屋漏偏逢连夜雨，在郑月准备离开的时候，兄弟和发小的被闫老板抓，郑月不得不与闫老板正面冲突，随之而来的却是越来越多的麻烦。
1938年时正日寇侵华，中国各地烽火连连，游击队队长况国华与日军少佐山本一夫苦战，国华为保农户之子复生单独和一夫决战，结困是两败俱伤，国华、复生、一夫正濒死之际，僵尸王将臣出现，把三人鲜血尽吸，时驱魔一族当代传人马丹娜赶至，虽把将臣击退，却失去了国华及复生的踪影，丹娜深知被将臣所咬便成僵尸，预言后世从此多事……
