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The following procedure is to use the state mode to improve the light. When it comes to encapsulation, the behavior of the encapsulated object is generally preferred over the state of the object. But the opposite is true in state mode, The key to the state mode is to encapsulate each state of the thing into a separate class, and the behaviors related to this state are encapsulated inside this class, so when button is pressed, only the request needs to be delegated to the current state object in the context, and the state object will be responsible for rendering its own behaviors. At the same time, the state switching rules can be distributed in the state classes in advance, thus effectively eliminating a large number of conditional branch statements that originally existed.针对6-9岁的儿童制定的英语课程。MaximumDateTime, minimumDateTime: Maximum and Minimum DateTime.Output:When ex-police officer Tom hears news of the abduction of Julie Delaney, he leaves his partner Sam and their beautiful coastal home and heads straight to the crime scene.是的，根本没有一点希望。杨长帆叹了口气，我的想法是，能不能让翘儿先留在家里，等我有了根基再接她走，现在的情况，我怕照顾不全。