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The reason why the logic for creating an object is put into a separate class is that it can be used by multiple clients. And separates the creation and use of objects. However, this design also has many defects. First of all, SimpleFactory is a specific class, so we must program for the implementation, making the system lose its flexibility in this respect. Second, if we add new products, we have to modify the code in SimpleFactory, which violates the opening and closing principle. The above model is also called simple factory. He does not appear in GOF mode, it is more like a programming habit.一名印度裔美国选手连续 12 年赢得著名的斯克里普斯全国拼字比赛冠军，这是体育史上保持最久的记录。《拼字王》讲述了四名印度裔美国学生在追求赢得标志性锦标赛冠军这一梦想道路中的起起落落。这部电影从 CNN 的桑吉·古普塔博士和法里德·扎卡里亚、喜剧演员哈里·科达博卢、ESPN 的凯文·内甘迪、1999 年斯克里普斯全国拼字比赛冠军、努普尔·拉拉等人的精彩视角，探索了这一令人难以置信的胜利背后的原因，以及给社会带来的影响。萨姆·雷加担任导演和制片人。由克里斯·韦勒制作。Fire emergency本剧讲述三个特种部队的优秀军人，退伍 后走上不同道路的故事。NBA game lasts 48 minutes and consists of 4 quarters with 12 minutes each.Setting position, foam type (referring to low, medium, high, anti-dissolution, fluorine protein, etc.), system form (referring to liquid, liquid, fixed, semi-fixed, etc.), foam fire extinguishing system diagram.How to test that GCC was not installed successfully?