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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.Chapter I General Provisions国术，只杀敌，不表演。Departure Position-Select the position where you want to start the flight. Joystick Support-If you want to use a joystick device on the computer, select and enable the joystick. To change these settings, exit the flight simulator and press Ctrl + Alt + A (+ Option + A on the Mac) to view the flight simulator help. To view this page at any time, press Ctrl + H (Windows and Linux only).　　卷进风暴之中的还有初入杂志社的实习生李娜（宋祖儿饰），对杂志有着别样野心的亚太区总出版人项庭峰（王耀庆饰），与杂志社有着千丝万缕关系的汽车品牌副总雷启泰（王泷正饰），幕后资本执棋者顾明山（李诚儒饰），富家女柳子琪（王紫璇饰），大隐于市的餐厅老板老颓（林永健饰）。Purple: Lithospermum, Black Bean, Mulberry