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
刚开始在家庭餐厅打工的近藤萌绘（葵若菜 饰），在打工的时候结识了与她同年纪的藤本裕子（今田美樱 饰），裕子送了一面穿衣镜给萌绘作为礼物。某天夜裡，萌绘正在睡觉时，房间内的穿衣镜发生了奇怪的变化・・・。
林佳乐、林佳琪、王志伟和江乘风，四名在不同领域的工程师，抱着同样为人类未来造福的梦想的同时，也寻寻觅觅地在这世界上找着自己梦想中的另一半，四人到底最终是否能梦想成真呢？梦想开始：佳乐渴望爱情，又害怕爱情，全因心中的“魔咒”作祟，担心一旦对身边男子有好感，对方便会遭到不幸，因此对男人，佳乐是望而却步，深怕自己会情不自禁喜欢上对方。佳乐第一次碰到志伟，对志伟却是厌恶到极点，误会志伟抢劫了了父亲王强。佳乐为了惩罚志伟，把志伟抢劫父亲的片段上载到网路，让志伟顿成了过街老鼠，人人喊打。没想到冤家路窄的两人，偏偏原来是同事。志伟不但是佳乐的新上司，佳乐还无意中救过志伟，可是佳乐从来没有告诉志伟真相，志伟也一直以为救他的是司徒艳。和佳乐不同，佳琪对爱情是充满理想的，可是期待的真命天子却迟迟未出现，直到那一天佳琪遇到了乘风。乘风到佳琪的公司维修机器，意外害得佳琪扭伤脚。乘风见佳琪受伤，好心送她到画室上课，不巧写生的模特儿没到，佳琪于是乘机报复，推乘风上阵。乘风受不了激将法，冲动答应，却没想到原来是充当人
In these aspects, "yes" and "no" are often inseparable. In some areas that already have strong strength, "researching and manufacturing high-end and high-quality products that represent the country's future competitiveness and establishing and perfecting a modern industrial system with distinctive features" are also the direction of Shanghai's efforts.
《国防科工》栏目是CCTV-7国防军事频道推出的一档电视杂志类专题节目。节目将展示我国国防科工领域取得的重大成果，科工人以身许国的家国情怀以及全球国防科工领域最新成果和动态。
Austria-Hungary: 300,000
汪直自封王侯，首选的媳妇，一定是其他王侯家的小姐，可大明的王侯再傻，也不会傻到跟徽王府联姻，日本、琉球的王侯又看不上，这首选几乎是没戏了。
故事围绕美国退休情报官员的绝密度假胜地展开。
许峻豪饰演连锁杀人犯，是联系男女主的“关键人物”。
专案组在挫败了间谍组织的一系列行动，抓获海昌间谍组织骨干王维韬，但武梅发现事件背后隐藏着一个更加令人震惊的阴谋——水母计划，境外间谍组织已将多枚“水母”投放到我国海域。
1984年，迪士尼与央视达成协议播放《米老鼠和唐老鸭》，这项合作受到了双方的隆重礼遇。当时迪士尼公司刚刚上任的CEOMichael Eisner （迈克尔·艾斯纳）亲自来北京，和当时国家广电部副部长一起出席了在长城饭店举行的发布会。艾斯纳当时曾说“《米老鼠和唐老鸭》进入 中国具有标志性意义。”
本片是一部充满神奇、感人，同时又给予人们希望和欢乐的电影。主要讲述了顽皮小狗偷乘圣诞老人的雪橇，以恶作剧的方式到达一个新的世界，开始给予快乐祝愿所有的男孩和女孩，但出了可怕的错误，那就是圣诞节的精神开始消失。现在的圣诞老人的幼崽和克劳斯夫人必须拯救世界各地的圣诞节......
该剧讲述了各自有着无法克服的烦恼，在论坛相遇的5个妈妈之间的友情，母性，以及成长的故事。
(2) ships engaged in dredging, surveying or underwater operations;
这是一桩围绕三代帝王的千古悬案，一部以史实为依托、融合民间传奇的古装情感大剧。 清圣祖康熙晚年，四阿哥胤禛迎合康熙“不但看儿子辈，还看孙子辈”的圣意，偷龙转凤，用钮祜禄氏侧福晋刚产下的女儿强硬偷换了隔院陈元龙阁老夫人刚产下的男孩，后父凭子贵继承大统改号雍正，极受康熙宠爱的孙子弘历同时被立太子。雍正法治严苛，血腥统治，在弘历身份之谜险被揭晓之际，为消除隐患，派“血滴子”暗杀其女鱼娘，并让弘历暗巡江南，也派人追杀。在弘历暗巡江南历经生死劫难之际，因缘际会结识鱼娘与吕四娘，展开了一段孽缘。弘历江南之行险阻重重，历经生死劫难之际，蓦然发现自己的身世背后竟隐藏着一个重大的秘密；而与自己有情感纠葛的两名女子刺杀的仇人竟都是当今皇上…… 皇室血统，先帝遗诏，掀起后宫前朝腥风血雨。帝王与民女相恋，贵为天子却无法主宰爱情；狸猫换太子，为江山百年昌盛。弘历艰难登基，继续惊心动魄的宫廷斗争，最后忍受失去爱情的痛楚，牢记帝王责任，成为千古明君，一代天骄。
这一刻，请别犹豫，勇敢爱吧！
"Because I have heard some scout comrades who came down from the enemy's rear say before, The Vietnamese army has the habit of dogs biting people. They just take advantage of the dog's low stature, The advantage of fast moving speed, Avoid fire, Then they rushed to the position with explosives and died with us. There is also the gunner who rushed up with the dog and bit us. Good jamming the gunner's shot, Buy time for their attack, I heard that they learned this tactic from Mao Zi. I don't know exactly what is going on. Anyway, that kind of "dog" is fantastic, with a large number and fast speed. It is difficult to hit all kinds of light and heavy firepower on hand. The closer they get to the position, the more they will take some simple evasive actions, which cannot be prevented.
