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一部关于侦探现实世界的戏剧作品，讲述了想要探究真相的人和想要隐瞒事实的人之间的对抗郑朝阳来到西柏坡参加了接管城市的学习班，而他历尽艰险带回的名册则给北平地区潜伏的国民党特务毁灭性的打击。等岁月一长，等脑子里的东西越塞越多，他就不信小娃儿还能记得张家那点事儿。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.Output: visit the subject: loveZixuan Collection www.bjzxcp.com is a well-known national collection brand, focusing on the collection of modern coins, gold and silver coins and stamps. It is a genuine promise, a seven-day return guarantee, a lifelong quality guarantee, no worries about selling, and the lowest in the whole network. National Unified Ordering Hotline: 010-57347086. Those with no collection value will not be put on shelves, and those with no investment value will not be recommended. Select Zixuan Collection to protect your collection investment. People often begin to think carefully about the proposition of "life and death" at the end of their lives, but it is too late. When the patient is handed over to the hospital and the corpse is handed over to the funeral home, who will be given the psychological pain? Who will ease the psychological pressure when facing the death of relatives? How should I understand death? If we start thinking about this topic when we are more sober, what will be the answer?