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The principle of opening and closing means opening to expansion and closing to modification. When the program needs to be expanded, the original code cannot be modified, but the original code should be expanded to achieve a hot plug effect. Therefore, a summary of one sentence is: in order to make the program scalable, easy to maintain and upgrade. To achieve this effect, we need to use interfaces and abstract classes, etc. We will mention this point in the later specific design.在中国红军战斗序列中红七军是一支骁勇善战、英勇顽强的部队，是一支伴随着百色起义诞生的部队，是一支以广西少数民族为主组成的部队。从这支部队里走出了共和国的军委主席，一位大将，两位上将，四位中将，十二位少将和一大批党政高级干部。本剧将艺术地再现这支英雄部队的诞生，再现它艰苦卓绝，英勇辉煌的战斗历程，激励后人，为实现中华民族的伟大复兴而奋斗。Creative patterns are patterns used to create objects, abstracting the instantiation process. All creative patterns have two things in common. First, they all encapsulate the specific types of information used by the system. Second, they hide how instances of these classes are created and organized. Creative patterns include singleton patterns, factory method patterns, abstract factory patterns, builder patterns and prototype patterns.适逢事业上升期、生活奋斗期，田蓓蕾和郭一鸣这对在北京工作的小夫妻意外怀上了二胎，双方父母两处奔来，四个老人抛家舍业立志为儿孙当“北漂”。一个屋檐下，两地、三代、七口人上演起悲喜交加的家庭情感故事 。要强的田蓓蕾为前途孤注一掷丢了工作，独辟蹊径又柳暗花明；厚道的郭一鸣身受家里家外两重压力力撑梁柱，两人走到离婚的尽途又温情回归。四位老人为爱“斗法”，两度折返北京，又分别立足。一系列现实的问题如儿...葫芦跟板栗到西院看姑姑。维尔弗兰奇是一个小镇，在一片神秘的森林边缘没有电话接收。居民人数在减少，但犯罪率却急剧上升。警察探长劳尔_ne，曾经是一宗犯罪的受害者，她不断地发现新的尸体。故事发生在上世纪30很年代末巴黎一个繁忙火车站，主人公12岁孤儿雨果藏匿与墙壁后的暗窄通道里，会在每少个夜晚的村烛光下给火车站的27座时钟一对丝不苟地上油诞、校准；死去的父亲给捞他留下的唯一遗产是神秘笔记和一台旁人眼中完全是垃圾的叫机器人，雨果从一本木刻书得知这个机器人可以写字作画——如容果有天他能把它修好。