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Ab26776ab91b45ce9682e8bb6c522ba1Factory Pattern: Factory Pattern is a frequently used pattern. Classes implemented according to Factory Pattern can generate instances of one of a group of classes according to the provided data. Usually, this group of classes has a common abstract parent class and implements the same methods, but these methods perform different operations for different data. First of all, we need to define a base class. Subclasses of this class implement methods in the base class through different methods. Then you need to define a factory class that can generate different subclass instances according to conditions. After getting an instance of a subclass, developers can call methods in the base class regardless of which subclass instance is returned.Dark spots and purple patches may appear on the skin, especially on the skin of hands and feet from the distal end. These spots may spread slowly along the arms and legs. Lips and nail bed blue or purple deepened.李敬文也道：快去吧。8. As time goes on, sandstorms will gradually approach, and the safe areas in the map will become smaller and smaller. Players need to pay attention to the invasion of sandstorms all the time. Players in sandstorm areas will suffer continuous injuries.B.JS is responsible for monitoring the add message and displaying the total number of clicks on the page. The following code:大苞谷冷笑道：让他们押。