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The best defensePlease remember that in DFU mode, the mobile phone has always been in a black screen state, and there will be no display on the screen. If any logo or prompt appears, it means that the DFU mode has not been successfully entered, which may be the official recovery mode. If this can also solve the problem, that would be great. If not, continue to obediently enter DFU mode.State mode refers to allowing an object to change its behavior when its internal state changes. The object seems to have modified its class. Divide this sentence into two parts by commas. The first part means to encapsulate the state into a separate class and delegate the request to the current state object. When the internal state of the object changes, different behavior changes will be brought about. The second part is from the customer's point of view, the object used has completely different behaviors in different states. The object seems to be instantiated from different classes, but in fact this is the effect of using delegates.Console.log ("I finally saw Baidu's pen test ~");Process Conditions for Waste Incineration Power Generation一部分人认为应该发动老百姓。“好男”周奉刚刚过了三十五岁大限，他再也经不起失业了。可他偏偏就要失业了！周奉在一家跨国企业做小职员，看上去也是个衣冠楚楚的“白领一族”，可是日子过得有多苦，只有他自己和媳妇杨娟才知道。眼看人到中年了，两口子还没混上一套自己的房子，只能寄住在他大姨子——杨娟的姐姐杨菊家里。局促的老民居，转个身都难，更别提杨菊向来就对周奉的老实巴交不以为然，于是这日子过得就免不了磕磕绊绊。最头疼的是，没有房子就没法儿要孩子，可周奉和杨娟，盼个孩子已经盼了很久了……最头疼的是，弟弟周全在老家混不下去了，进城来投奔“有头有脸”的哥哥。周奉只能让他回老家，周全却瞒着他把火车票退了……