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Action: A face of doubts.……后来，我常想起……清南村的女孩子……纤尘不染……都很可爱。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.The second method: black screen recovery死亡通知，这个实验性计划，将会经过好几轮的测试，每一轮的测试，都会挑出几个即将过世的特定人选，观察他们收到死亡通知以后的反应和作为，再依据每一轮的观察结果，决定人类未来，是否都能收到这倒数七天的死亡通知，无论曾经活得多么悠然自得或是挣扎在生命的边缘，作为感情动物的人类，每个人心中总有牵绊、总有挂念、总有遗憾吧…… 到那时候死亡的方式已然不再重要，重要的是这7天时间怎么活，是天界给人类最后不留遗憾的机会，是死神的怜悯。而这个机会人类是否能善加利用？漫画师费英雄对女同事保儿一往情深，遭到情敌--漫画社老总秋田久的一再打压。英雄生日醉酒后许愿，希望真正的英雄帮自己打败秋田久。没想到真的使四大功夫高手时空穿梭到现代…How to operate MDT;