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The picture shows Mr. Sun (second from right) leading the team leader (first from right) and vice-captain (first from left) to take a picture with the practice unit.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.包公出巡金陵，发现地方官私征重税，百姓敢怒不敢言。原来金陵王曹鸿觊觎大宋江山，多年来招兵买马，誓光复沙佗王国，更不惜将女儿玉兰嫁予都督苏宴，且利诱包拯为其效力。大将军钱承刚欲揭发曹鸿阴谋，不料祸及满门，其子金戈侥幸生还，却与玉兰互生情愫……　　她沉睡、吵闹，哭泣，始终不愿意完成最后的拼图。这后面还藏着更关键的东西——为官之道。There are many kinds of injuries in WOW, such as ice, fire, shadow and nature. . . Among them, the natural damage small D and SM have, small D's anger. Lightning of SM. .季木霖：……好了