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Factory Pattern: Factory Pattern is a frequently used pattern. Classes implemented according to Factory Pattern can generate instances of one of a group of classes according to the provided data. Usually, this group of classes has a common abstract parent class and implements the same methods, but these methods perform different operations for different data. First of all, we need to define a base class. Subclasses of this class implement methods in the base class through different methods. Then you need to define a factory class that can generate different subclass instances according to conditions. After getting an instance of a subclass, developers can call methods in the base class regardless of which subclass instance is returned.If the rope is loose during the competition, it should be tied back immediately. Otherwise, the competition will be disqualified.该剧由前单口演员Dave Flebotte编剧及制作。讲述上世纪70年代的LA单口表演舞台。《爱与梦飞翔》并不是柯受良传奇，但剧中主角，却有柯受良的影子。一个渔村长大的小子，经历挫折成长，最终成为一位出色特技人。However, super pilots need to fly safely for at least 1480 hours and have the capability of non-multi-weather conditions and multi-aircraft.Public class SourceSub1 extensions Wrapper2 {　　父亲虽善良，可又愚昧，他要翠巧在四月里完婚。顾青行将离去，翠巧要随去延安，顾青有心无力。翠巧弟弟憨憨跟着顾大哥，送了一程又一程。翻过一座山梁，顾青看见翠巧站在峰顶上，她用甜美歌喉唱歌送别，顾青深受感动。