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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.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？1920年的暑期，浙江温岭等四县洪潮泛滥。在那种灾情的乱世之中，有人要发灾难财，有人要活命。胭脂是一个善良的女锁匠，她为了活命，和养父一起，逃荒逃到苏州。胭脂心灵手巧，带有市井小姑娘的健壮、机灵、勤快与诚实的特征，并且有一手修锁开锁的好手艺。胭脂认为会和养父在苏州过得衣食无忧。不料有天胭脂遭人诬陷，被判处在36天后枪决。胭脂出逃中被枪打晕过去，等她醒来时发现躺在北方一户富贵人家的小姐房中。胭脂满腹疑团，经探查后才知道，她的亲姐姐和洋人勾结在一起要将镇上的矿石运送到海外牟利，为此要拿她当替身。胭脂从进步青年钱仲杰那里接受了很多关于马克思主义的知识与理念，她认为这些矿石是小镇和国家的资源，绝对不能被外人掠夺。最终，胭脂说服了姐姐改邪归正，他们一起为保护小镇资源做出了贡献。A4.1. Visual function examination.真不巧。　　佟家在青河镇看上去是家大业大，风光体面，富贵显赫，内里却极不安牌坊下的女人宁。佟善群的二太太徐凤琴出身低微，是佟善群从妓院里把她娶回家的，所以，凤琴一直认为自己在家中没有地位，整天胡搅蛮缠的，不是找大太太素蓉的茬，就是看弟媳其贞碍眼。就连她刚满九岁的亲生儿子佟喜才迎娶进门的“大”媳妇方瑾，更是受尽了她的虐待和折磨。