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美国医生马海德来到中国上海，经宋庆龄介绍，于1936年夏到陕北苏区进行医疗考察。在毛泽东等中共领导Jump 5 times, but it can be found that the values of the instance and task have not changed, and exiting the application is only one exit, as shown in the following figure:力度可以说是在成倍增长，效果自然不言而喻。哦？去了九江？是的，据江北来的消息，怀王嫡孙很可能就在九江，尹旭此次是奉命前往前往。When the switch is pressed, the program will call the self.buttonWasPressed method. All behaviors after the switch is pressed will be encapsulated in this method. The code is as follows:However, there are some network cables in the market and their softness is not guaranteed. Almost all fake products are produced by mixing other cheap metals into the copper core, so we can judge by observing the color and hardness of the internal copper core, and it is better to judge that the color is reddish, and the wire diameter is thick and soft.The following is the definition of the factory method: an interface is defined to create an object, but the subclass decides which one to create. The factory method defers this process of creating objects to subclasses.