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1. At the beginning of Apple's establishment, it mainly developed and sold personal computers. As of 2014, it was committed to designing, developing and selling consumer electronics, computer software, online services and personal computers.Here are a few columns to illustrate the benefits of the responsibility chain:(1) Announce the admission control score line for each batch of ordinary college entrance examination undergraduate courses, vocational education teacher classes and higher vocational classes, and the first-class model college entrance examination province, and examine and approve the qualification standard for ethnic preparatory helicopter;Dynamically add some additional responsibilities to an object. In terms of adding functionality, the Decorator pattern is more flexible than generating subclasses./bite (bite)Wan(Namwan)是一个从小被宠坏的富家千金，跟奶奶，妈妈及两个Aunt住在一起。她的母亲从她小时候起便一直告诉Wan她的父亲是一个坏人，抛弃了她们与另一个女人住在一起，所以Wan自小便憎恨父亲及他的另一个家庭，并且相信父亲从不爱她。Alison DiLaurentis，紫檀日镇坏女孩的「领袖」，对她的小圈子一直采取「铁腕统治」政策。她的死党包括：Spencer Hastings，一个完美主义者，一直很嫉妒自己成绩优异的姐姐，是这个圈子里唯一敢对Alison说「不」的人；Hannah Marin，身 材有些丰满，一心想要让自己出名，于是对Alison曲意逢迎，言听计从；Aria Montgomery，曾经很不愿融入社会；还有Emily Fields，一名游泳好手，父母极端保守，对Alison没有任何好印象，总希望女儿不要跟她来往。