The Liskov Substitution Principle (LSP) is one of the basic principles of object-oriented design. The Richter substitution principle says that wherever a base class can appear, subclasses can certainly appear. LSP is the cornerstone of inheritance reuse. Only when derivative classes can replace base classes and the functions of software units are not affected can base classes be truly reused, and derivative classes can also add new behaviors to base classes. The Richter substitution principle is a supplement to the "open-close" principle. The key step to realize the "open-close" principle is abstraction. The inheritance relationship between the base class and the subclass is the concrete realization of abstraction, so the Richter substitution principle is the specification of the concrete steps to realize abstraction. --From Baidu
这是一个关于中产阶级母亲经历的考验和创伤的节目，关注竞争的一面和对养育子女的非浪漫态度——而不是可爱和可接受的母亲形象。
召唤魔术没有成功，濒临留级危机的学院生阿尔特，从偶然发现的古老召唤魔术书中描绘了魔法阵
此事也不是他一个人就能说了算的，还需要找大臣和谋士商议一番才是。
CBS网络平台剧集#黑色童话##Tell Me a Story#第二季确定为公主主题，目前已经确定会有《美女与野兽》里的贝儿、睡美人和灰姑娘！ 该剧每季一个不同的故事，将经典童话进行融合，形成新的黑暗故事。另外，第一季里的Paul Wesley将会回归。
婚前，王可可和黎小俊两家共同为小两口买房，却因各种原因，黎小俊只在合同上写了自己一个人的名字，王可可浑然不知。婚礼当天王可可气愤黎小俊隐瞒事实，黎小俊解释未果，王可可逃婚离开。相爱彼此的两人静下心来后，互相检讨自己的过失，两人牵手言和。黎母对王可可提出尽快生孩子的要求，王可可为逃避家庭琐事，决定找份高薪工作以表能力。王可可巧遇黎小俊的老板程大成成为他的助理，小两口成了同事。因王可可工作出色，又成了黎小俊的上级，两人经常把工作中的喜忧带进了婚姻，产生了一些误会矛盾，但两人相爱的心却没有因为任何外界的力量分开过。历经波折，王可可和黎小俊决定补办一次完美的婚礼。
大龄男青年王大壮被家里人安排相亲，在经历了一次次奇葩女之后，一个人外出寻找艳遇，在结实女骗子杨丽后误入传销，通过眼镜男的帮助王大壮协同民警打击了传销抓走了传销人员，在回家的车站意外上错车偶遇到儿时玩伴朱婕，在和朱婕的接触中得知朱婕同样有不顺利的爱情，最终展开表白，最后经历千辛万苦的剧情终于得到了真爱
独自一人生活的昔日校长森衣恭一与亡妻生前饲养的流浪猫相依为命，但森衣却不太喜欢猫，每天想方设法赶走它。可是有一天，这只猫再也没回家，心急如焚的森衣开始全力寻找，周围人听到猫咪失踪的消息，也纷纷开始了找猫行动……
夜幕下的山林里，板栗在前开路。
Singleton mode refers to ensuring that there is only one instance of a class and providing a global access point. It solves the problem of the number of entity objects, while other builder modes all solve the coupling problem brought by new. The main points of its implementation include:
公元前139年，张骞率领百余人组成的使团出使西域，中途遭匈奴截杀，张骞与向导堂邑父沦为阶下囚，被困于匈奴十年之久。这日，张骞与堂邑父正照常奉命测绘地图，却不料偶遇大汉斥候耿乐。两军交战，耿乐被俘，误会张骞已经叛变。张骞与同伴的出逃计划因此被打乱……
在阴谋交错的国际大都市“上海”，历史上所不为人知的大战序曲，现正上演——
安保工作？我们出版社好得很啊，也安排了保安。
影片以金融集资诈骗、电信诈骗和虐待儿童的真实社会故事为背景，阐述社会中人的欲壑难填，从而最终走向以身犯险的犯罪道路的故事
The following question: The fire truck lane should meet the requirements of disaster relief and evacuation, and its width should ensure that the fire truck can still pass after the houses on both sides of the main road are affected and collapsed. Reasonable planning, construction and renovation of fire lanes shall be carried out in the blocks. The width, spacing and turning radius of fire truck passages shall be required by relevant regulations of symbols to ensure the smooth flow of fire truck. Cities with rivers and railways passing through should take measures such as adding bridges to ensure the smooth flow of fire engines. Due to the needs of urban construction, when temporary excavation or occupation is necessary, the approving unit must promptly notify the public security fire supervision institution. GB50016-2006 Code for Fire Protection Design of Buildings 6.0. 1 The passage of fire engines should be considered for the roads in the block, and the distance between the center lines of the roads should not be greater than 160.0 m m. When the length of the building along the street is greater than 150.0 m or the total length is greater than 220.0 m, a fire lane shall be set up to pass through the building. When it is really difficult, an annular fire lane shall be set up. 6.0. 2 For buildings with closed inner courtyard or patio, when the short side length is greater than 24.0 m, fire lanes entering the inner courtyard or patio should be set up. 6.0. 3 When buildings with closed inner courtyard or patio are along the street, pedestrian passageways (stairwells can be used) connecting the street and inner courtyard shall be set up, and the spacing shall not be greater than 80.0 m m.. 6.0. 4 Facilities that affect the passage of fire engines or the safe evacuation of personnel shall not be set up on both sides of the fire lanes that pass through the building or enter the inner courtyard of the building. 6.0. 5 Gymnasium with more than 3000 seats, exceeding
Article 55 These Provisions shall not apply to the maintenance of building fire fighting facilities within the warranty period by the construction unit.
本是瓦匠世家的她，考古中意外魂穿成了患有洁癖的工匠之女身上，凭借惊为天人的工匠绝技混得风生水起，却莫名卷入了一场乱战，而她回到现代的唯一途径，便是参与这场夺嫡之争。
《学校2017》将是真正的校园故事，像“学校”系列最初篇章一样展现校园生活。
对于43岁的老男孩路易斯来说，生活是简单惬意的，他满足于自己轻松快乐的单身生活，而沉浸在母亲和五个姐妹的簇拥爱护之中，路易斯更感到幸福无比，他希望一生都如此延续下去。可是，路易斯身边的六个女人恰恰倦怠于保姆式的生活，她们一致认为路易斯该结婚了，而且越快越好，这是全家最迫切棘手的问题。一场危机摆在路易斯面前，他突发奇想，萌生一条妙计。
