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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.So you said that the protective equipment did not play a protective role, Of course it did, In those days, Bulletproof vests and other things are still not popular, Helmets are the most important protective gear, I am lucky to wear a helmet, Otherwise, I would have been a martyr long ago, and I chose whether to wear a helmet or a cloth hat. There is no mandatory regulation. I heard that the artillery of the Vietnamese army at position 149 is relatively fierce, so I chose a helmet to enhance the protection of my head. I didn't expect it to be of great use in this place. To be honest, every time I think about it, I still "thank myself." Zhang Xiaobo said here and subconsciously touched his head, as if he were glad that he was wearing a helmet at that time. Otherwise, according to the description of the lethality of this large killing insect, not to mention five or one nailed to his head, the consequences would be unimaginable.Use the-j option to specify that the action corresponding to the current rule is ACCEPT.性情古怪的奥德曼先生（杰弗里·拉什 Geoffrey Rush 饰）是一家顶级艺术品拍卖行的鉴赏拍卖师，在他几十年的职业生涯中几乎从未失手，他最大的爱好就是收藏各种时期的女人肖像画。比利（唐纳德·萨瑟兰 Donald Sutherland 饰）帮助他用低价拍到心仪的画作，而年轻人罗伯特（吉姆·斯特吉斯 Jim Sturgess）则帮助他用技术手段鉴定古董真伪。直到一天，一个神秘的女主顾克莱尔（西尔维娅·侯克斯 Sylvia Hoeks 饰）带着大批的古董遗产走进了他的生活，克莱尔声称患有广场恐惧症因此从不露面，但是这种特殊的交流方式却让奥德曼渐渐着迷，他甚至求助于罗伯特追求女人的方法。终于有一天奥德曼放弃了自己原有的生活，可是一个惊天的阴谋正在悄悄等待着他。8板栗和小葱等人虽然对百姓微笑致意，却不曾呼喊喝叫，一直维持肃穆军威。Users can safely request proxies. They only care about whether they can get the desired results. If we don't need a proxy object, we can directly change it into an ontology object to call the method.