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Now, the PizzaStrore (FactoryPizzaStore) is abstract. The CreatePizza method has been migrated back from the simple factory. In PizzaStroe, the CreatePizza method is now abstract.百姓们说长道短，书院的学子们更是如开锅的沸水般，各执一词，争论不休，其情状不比朝堂逊色。It is a pseudoscientific concept that is neither possible to prove nor difficult to falsify. Say yes, don't take it seriously.These two problems constitute the core of reinforcement learning for classical control problems.儿女的姻缘都有定数，强求不来的。In essence, classification is to find the common points and differences of things in our thoughts. It is the basic method and ability for us to know and understand the world. On the basis of classification, it is possible to judge and reason, and to form concepts and make decisions. Classification requires comprehensive demonstration activities such as association, analogy, reasoning and extension, and is the basic cell of thinking.1997 年秋天，迈克尔·乔丹和芝加哥公牛队开始了他们八年来第六个 NBA 总冠军的追逐。但是，尽管乔丹自 13 年前大放异彩以来取得了非凡成就，但主教练菲尔·杰克逊称之为“最后的舞动”的这次比赛被俱乐部高层中的紧张气氛所笼罩，因为这是最后一次看到有史以来最伟大的球员和他杰出的队友们一起奋力拼搏。