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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.勋章，标识着英雄，铭记着不可忘怀的故事。上世纪三十年代，战火纷飞的年代。石破天，在铁血战场上生死不惧、屡建奇功的红军团长，突然接到神秘任务，竟然是护送一个名不见经传的交通员！如此反差强烈的变动让这位个性桀骜不驯的斗士觉得非常窝囊。然而，波澜不惊的背后隐藏着牵一发动全身的玄机：由于顾顺章的叛变，中共在上海的地下党组织受到毁灭性打击，设在上海的国际电台被敌人破坏，为了迅速恢复党中央与外界的联系，潜伏在敌人特工总部的地下党员宋英杰秘密掩护交通员通过上海，冒着巨大的风险向正在长征途中的党中央秘密遣送大功率电台和特一级密码Bulgaria: 275,000一部记录片讲述了“金钱抢劫”的原因和方式，引发了全世界对一群可爱的小偷和他们的教授的狂热。5 fixed-term imprisonment: whoever commits the crime of causing traffic accidents shall be sentenced to fixed-term imprisonment of not more than 3 years or criminal detention; If a person dies due to escape from a traffic accident, he shall be sentenced to not less than 7 years but not more than 15 years.Opening Bank: Nanchang Qingshanhu Sub-branch of China Merchants Bank