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A) Object-oriented paradigm. That is, people's legendary thoughts. Encapsulation, inheritance and polymorphism, in my opinion, are slightly higher than if, for, etc., which are also grammatical problems. The three principles to master in object-oriented programming are Plato principle, Liskov substitution principle and Parnas principle. These three principles are actually very simple. Any principle that you find difficult to fall in love at first sight and quickly identify with is not a good principle.根据英国作家珍妮弗·沃斯的畅销回忆录改编，讲述上世纪五六十年代伦敦东区一群助产士的生活经历。本季故事承接2017年圣诞特辑，从1963年年初讲起，大雪给助产士们的工作和生活造成了诸多不便，Nonnatus House迎来一位新护士……钱途励志要成为中国最好的电视节目主持人，有朝一日能够站在春晚的舞台上，然而经历了十多年的拼搏，钱途不仅没成功，老婆还带着儿子离他远去。吴靓经历了一场失败的恋爱，她把原因归咎于父亲“囚笼”般的管束，分手后，吴靓发现自己怀孕了，她决定要把孩子生下来。钱途与吴靓各取所需在民政局领取了结婚证，向着各自的目标前进，却屡遭父母、亲朋的误解与质疑。在人生的低谷中，两人抱团取暖，逐渐产生了感情。在吴靓的启发下，钱途明白了：父爱的责任不仅仅是为儿女获得物质上的拥有；而钱途也让吴靓理解了：父亲的管束源于他伟大的爱。两个人从角色的互换中理解了对方，最终他们取得了事业的成功，也获得了新的爱情。The positioning hole is a round hole with a diameter of 3.2 mm. In the horizontal direction, the distance between the hole position and the frame is ≤ 14 mm. The holes are equal in the vertical direction.(2) If the book club finds that the content of the death assignment in this novel conflicts with the law or contains unhealthy and vulgar content, and needs your help to maintain the harmonious development of network civilization, please report it to the website immediately.金赫（朱镇模饰）与金哲（金康宇饰）兄弟两人，与李英春（宋承宪饰）同为朝鲜逃北者，当年金赫为了生存抛弃弟弟，令被韩国羁押多年的后者怀恨，金赫经多年努力，始终无法得到弟弟的原谅。金赫与英春在韩国加入了枪支走私团伙，两人凭借过人的能力深得老大信任，并受托带挈老大的侄子郑泰民（赵汉善饰）。岂料表面恭顺的郑泰民因无法得到叔叔的器重，对金赫恨之入骨，在一次交易中将其陷害入狱，欲为金赫报仇的英春身负重伤，一条腿被废。三年后，金哲成为了一名韩国警察，他誓将兄长的团伙绳之以法；郑泰民在组织中爬上高位；而刚出狱的金赫一无所有，他找到落魄度日的英春，二人要拿回属于自己的东西。