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For example, the average monthly living expenses of the lowest income group in a certain area are 210 yuan, the maintenance coefficient of each employed person is 1.87, the minimum food cost is 127 yuan, Engel's coefficient is 0.604, and the average wage is 900 yuan.可是，道路两旁依旧站满了人，大多是熟悉的面孔，顶着大雪、满脸敬畏地看着逶迤而来的车驾。二更求粉。葫芦咬牙道：我不跟你闲扯，四成。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.Step 3: Do not put on the startup key/power key, and press the HOME key for another 10 seconds. This step is to turn off the phone and the screen is black.在朝鲜时代，很多人要与素未谋面的人结婚并相伴一生。基于这种原因，有时结婚对像被掉包都可能无从知晓。而如果掉包对像是男人！横冲直撞的新婚生活轻喜剧，一对壁人成为父母政治婚姻的牺牲品，婚礼上才发现新娘是男人？却在慢慢接触中对彼此产生了微妙的依恋…