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书签上还有一行清秀俊逸的手写字。这才半天的工夫，他们觉得就跟过了多少天一样。《神奇校车》是美国国家图书馆推荐给所有学龄前儿童和小学生的课外自然科普读物，是全美最受欢迎的儿童自然科学图书系列之一。1994年，美国Scholastic集团将其改编成动画片推上银幕。在一次次不可思议的神奇之旅中，让孩子们体验原理、学会操作、懂得思考、爱上科学。板栗笑骂道：别丢人现眼了。　　为了还自己清白，齐淼努力查找真相，一个惊天秘密浮出水面....赵王歇和陈余等人接到消息都很是兴奋，无论汉军有多么厉害，可人数上终究差的太多，怎么可能是赵军的对手呢？大王，汉军撤退到河边本阵之中，那里有他们的两万人马接应。User class unified interface, User1 and User2 are different objects respectively, and they are related. If the mediator mode is not adopted, the two need to hold references to each other, so the coupling degree between the two is very high. In order to decouple, the Mediator class is introduced to provide unified interface, and MyMediator is its implementation class, which holds instances of User1 and User2 to control User1 and User2. In this way, User1 and User2 objects are independent of each other. They only need to maintain a good relationship with the Mediator, and the rest is maintained by the MyMediator class! Basic implementation: