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王突听了不信：真的？那小子能这样大度？王尚书沉脸道：别小觑人。Spend your spare time on upgrading your own quality-such as reading plan, skills training, etc. The poverty of the poor is often a double deprivation: lack of money and time. Therefore, we must learn to plan our spare time and, when necessary, learn to replace time with money like Ma Jun.First of all, I would like to express my expectation for updating the difficulty options of the game.9-3 User: Create a class named User, which contains the attributes first_name and last_name, as well as several other attributes that the user profile usually stores. Define a method named describe_user () in the class User, which prints a summary of user information; Then define a method called greet_user (), which sends personalized greetings to users.Composite Reuse Principle (CRP) is to use some existing objects in a new object to make it part of the new object. New objects reuse used functions by delegating to these objects. In short, it is necessary to use synthesis/aggregation as much as possible and not inheritance as much as possible.