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If I were to implement a pizza ordering system, I would definitely write the code like this, because this kind of code can be written subconsciously without consuming our brains. However, take a closer look at this code: the purpose of this method is to order pizza. However, the code for ordering pizza also needs knowledge about the production of pizza. This method must know all pizza. Worse still, if the types of pizza are to be expanded or pizza with poor sales volume are to be deleted in the future, then the code for ordering pizza will be modified. It looks very bad and should be revised. Our first step must be to separate the code for producing Pizza from the code for ordering pizza, because you should not let the code for ordering Pizza know the logic for producing pizza, but should hand over the logic for producing Pizza to a special type. In this way, we can cope with future changes-if we want to add or delete pizza, we can directly modify the producer of pizza without affecting the logic of ordering pizza.这是一部建设社会主义新农村的故事，这是一个一伙年轻人以大山来平台做大山文章的故事，这是一个四个女人和一个男人的情感纠葛故事，这是一个实实在在，积极向上，曲折生动，引人入胜的故事……主人公王青山，为实施山区可持续发展，毅然辞去省农业厅科长职务，跟省里的女拼音杨倩一起返回家乡乌龙山区决心做起了普通农民，打算用自己学的知识带领家乡人民致富，给家乡来个翻天覆地的大变化。谁知道事情可没有他们两个年轻人想的那么简单，处处有阻挠，又处处冒生机。经过种种的坎坷，以王青山，王霞，刘芳等为代表的一群年轻人，带领这山里的乡亲开始了轰轰烈烈的经济大踏步。输人不输阵，何况她还没输呢。2268Sub. Operation ();胡宗宪抬手指了指牌匾，恕我直言，你毕竟与夏言同脉，太过正人君子，谋事太过耿直。