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The fundamental reason for using design patterns is to adapt to changes, improve code reuse rate, and make software more maintainable and scalable. In addition, the following principles should be followed when designing: single responsibility principle, open and closed principle, Richter substitution principle, dependency inversion principle, interface isolation principle, composite reuse principle and Dimit principle. Each design principle is described below.It will never be given by others.The validity period of the temporary first-class qualification is two years. After the expiration of the period, the corresponding qualification may be applied for in accordance with these Provisions.章邯冷笑一声：谁干的？军需官颤巍巍答道：只知道是楚军，人少至少过万，统军将领尚不得而知。《美女足球队》讲述了一个足球学校为了迎接香港明星足球队的友谊赛而聘请了曾经叱诧球坛的足球先生——赵大河（彭旭饰），女汉子林晓路（李梦云饰）误会其为色狼，在解除误会后两人渐渐产生情愫，而校花队友朱沐歆（许嘉雯饰）也对教练一见钟情，对追求者马锋（皓博饰）不冷不热只当做备胎。四人陷入了爱情拉锯战，而林晓路也因重病耽误赛事。在爱情与病魔的双重打击下，女汉子林晓路将如何应战呢？　　刘在明饰演餐饮界大企业“张家”的会长张大熙，他因为小时候饿肚子的记忆所以投身餐饮业，凭借一己之力成为以他为中心的财阀，是一个权威主义者。因为儿子的意外，他再次和眼中钉朴塞路争锋相对，如同铁壁的他的人生逐渐动摇。