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这时候，燕南天也算是知道了《嫁衣神功》为什么会被称为武道禅宗3. Installation of Engineering Dependent ModulesThe 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.4. Read relevant papers to ensure that the latest developments in this field are not missed;Fifth, the current curriculum system for online thinking ability training products is slightly thin, and the curriculum content needs to be continuously polished and improved.整整一天，新安一直笼罩在沉重的气氛中，压得人有些喘不过气来。