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1. Customer trust is stronger;Explain that in the OrderPizza method, we do a lot of things, including calling the CreatePizza method to generate a desired pizza, and then doing a series of operations on the pizza. The key point is that Pizza is defined as an abstract class, which means that in the OrderPizza method we don't care what type this Pizza is at runtime, in other words, this is decoupling. The coupling between PizzaStore and Pizza is uncoupled.吴凌珑继而问道，哪里人？生在山东，长在江南。终于有一天，霸道总裁路晋卸下了精英的高冷面具变身忠犬男友，小魔女褪去了刁蛮任性学会如何去爱，二人在美食中寻觅到简单的幸福。上帝偶尔会瞌睡，丘比特有时也会手抖，但命中注定的那个人终会踏遍千山万水与你相会。终于等到你，余生都是你。So far, a simple file upload program has been written. Of course, this is still a counterexample. The disadvantage here is the same as the first code in the light example. The program is full of if and else conditional branches. The state and behavior are coupled in a huge method. It is difficult to modify and extend this state machine. This problem is exacerbated by the complexity of the links between file states讲述了布卢姆茨伯里派(Bloomsbury Group)40多年间的故事。其成员如Virginia Woolf, Vanessa Bell, Edward Morgan Forster等、他们的复杂关系、激荡的内心世界、对自由和理想的不舍追求，以及这些对他们的作品的影响，都会在剧中被精彩呈现。There are three main reasons for the peculiar smell of automobile air conditioners. First, there is exhaust gas leakage from the external engine and foreign matter in the air inlet, which leads to unpleasant smell from the air inlet of the air conditioner. In this case, it is very good to check and go to the repair shop to open the cover for inspection, which can be clearly seen. Second, the air conditioning filter element is too dirty. Regular cleaning and inspection can completely prevent the occurrence of peculiar smell. Third, the air conditioning pipes and evaporators are caused by mold, which is also more troublesome and expensive to maintain. The first two situations are relatively simple and easy to check. The following focuses on the third reason, why mold can be produced in pipelines and evaporators. The following master will give you a brief introduction.