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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.当今各种交友软体推陈出新，约炮文化盛行，人人都只想要谈场速食爱情。生于千禧世代的马汀和盖比因为交友软体而相识，随即陷入如胶似漆的热恋期，感情却随着时间过去越趋平淡，两人都迫切渴望拥有新的刺激。身处在这个充斥“开放式关系”的花花世界里，这对情侣究竟能否维持“稳定交往中”的感情状态，还是会彻底迷失在选择泛滥的社群网路之中……Enterprise Strategy Branch Strategy, Business (Product Line or Division) Strategy and Functional Strategy. BLM provides a unified framework for enterprises to formulate strategies at all levels, but its area of expertise is still business strategy. The following figure shows the seven steps of BLM business strategic planning:一桩桩案件惊现海州市，引起了相关部门的注意。因这一起起案件的交集点都在一个叫刘眉的女子身上，而她又是本市药业集团所拥有了的一座大厦的经理，于是，公安部门派出了年轻貌美而有学识丰富的汪静雯以投资人的身份进入了药业集团，暗中搜集证据。药业集团的老总郭小鹏是人人称羡的钻石王老五，汪静雯与他一见如故。岂料郭小鹏表面上正直上进，其实暗地却是一名老奸巨猾的大毒枭。加上他的情人刘眉在处处作对，汪静雯的行动处处受阻。于此同时，刑侦支队副队长李新建率队捣毁了郭小鹏的一出冰毒加工基地。没了原料的郭小鹏，派刘眉前往新疆寻找原料，在新疆一场恶斗展开了。另一方面，汪静雯堕进了郭小鹏精心编织的情网。When selecting time relays, the following rules can generally be followed:爱若初见As a result, there is no conflict between maternity leave and paid annual leave, and female employees can enjoy both maternity leave and paid annual leave.