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Application software is a variety of programs that are user-oriented and written to solve practical problems. It can be written by users themselves or purchased. For example, we often use office software Office XP, drawing software Photoshop, game software Red Alert and so on.One problem with the factory method pattern is that the creation of the class depends on the factory class, that is to say, if you want to expand the program, you must modify the factory class, which violates the closure principle. Therefore, from the design point of view, there are certain problems, how to solve them? We use the abstract factory mode to create multiple factory classes, so that once new functions need to be added, we can directly add new factory classes without modifying the previous code. Because the abstract factory is not very easy to understand, let's look at the diagram first, and then it is easier to understand with the code.受到的依赖和需求度将会大大的折扣，若得不到足够的重视，也就不可能获得巨大的利益，尤其是和项羽这种人谈条件谈合作，怕是也是十分危险的。2. Sailing vessels shall give way to the following ships when sailing:翠华中学美术老师兼任辅导教师张明晖在校内储藏室创办了读书会阅读禁书、成员包括音乐老师殷翠涵、学生魏仲廷等人。另一方面方芮欣因为家庭失和使学业成绩受到影响，殷翠涵便引介她给张明晖，希望张明晖能辅导方芮欣走出低潮，孰料在密切的心理辅导之下，方芮欣与张明晖意外产生了师生恋，张明晖并亲手做了一条白鹿项链赠与方芮欣。另外三个则是官宦家的小姐，分别是杜宰相的孙女、大理寺卿汪正松的孙女、荣郡王的孙女。However, with traced armour-piercing firebombs, the distance of efficient killing is more than 10 times, giving us more time to respond and buffer. When they get close, they will not be burned much, and the pressure on defensive positions will naturally be less.