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Adapter mode is intended to transform interfaces. It can make two classes that can no longer work together work together, so it is often used in class library reuse, code migration, etc. For example, the DataAdapter class applies the adapter pattern. Adapter mode includes class adapter mode and object adapter mode. The specific structure is shown in the following figure. On the left is class adapter mode and on the right is object adapter mode.Criteria for citation2016年，一場婚宴正在舉行，而實際上是一場36歲的高中同學會…在德国转了一圈后，美剧《国土安全》第六季的故事将回到美国纽约，在近日举行的TCA冬季会议上，播出单位Showtime的负责人David Nevins透露了上述消息。Another expression of the minimum knowledge principle is to communicate only with direct friends. As long as there is a coupling relationship between classes, it is called a friend relationship. Coupling is divided into dependency, association, aggregation, combination, etc. We call classes that appear as member variables, method parameters, and method return values direct friends. Local variables and temporary variables are not direct friends. We require unfamiliar classes not to appear in the class as local variables.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.