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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.当即流下了眼泪：俺不晓得还能不能见到俺闺女。It is understood that the second season of the program will debut on July 15, 2018 and will be broadcast on CCTV Financial Channel from 19: 00 to 20: 30 every Sunday, with a total of 25 issues. The 26th Charm Ceremony will be broadcast on January 1, 2019.[News] On the evening of February 6, netizens "wanted to say but couldn't say it" posted on a forum, saying that they were authentic Shanghainese, had a well-off family, and talked about a boyfriend who was a foreigner. At the request of my boyfriend, I went to my hometown in Jiangxi for the Spring Festival holiday this year, but when I went to my boyfriend's house for my first dinner, "I really felt nauseous at the sight of this meal. It's 100 times worse than I thought, and I can't accept it." So she decided to break up with her boyfriend and return to Shanghai. As soon as the online post was published, it immediately became the focus of everyone's attention. Some people supported "Shanghai women" and others supported "Jiangxi men". All parties held heated discussions.郑氏微微一笑道：珊瑚，你是做女儿的。离开合宿所的龙马在哥哥越前里加的邀请下，决定作为美国代表参加“U-17世界杯”。不知道杨大傻他爹得了信儿怎么想。