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For example, in Java, the Selector's select () method is used to implement this synchronous blocking operation waiting for an event to occur. In the implementation of select () under Linux operating system, a) will call epollCtl (epfd, opcode, fd, events) to register the events that have been registered in Initiation Dispatcher into Linux system, where fd means Handle and events means Handle events that we are interested in; B) Synchronize the occurrence of a blocked wait registered event by calling the epollWait method. Events on different event sources may occur at the same time. Once an event is triggered, the epollWait method will return. C) Finally, find the associated SelectorKeyImpl object by the event that occurred, set the event that occurred to the ready state, and then put the SelectorKeyImpl into the selectedSet. In this way, we can get the event-ready SelectorKeyImpl collection through the Selector.selectedKeys () method.电影还没有开始，影厅里已经坐得满满的了。哥哥出去了？小葱沉思，怕是那谋反案要结案了吧。2. Learn knowledge, seek development, and persist in shaping people with a prosperous culture. The overall quality of young people in rural areas is not very high, so it is urgent to improve their ideological, moral, scientific, technological and cultural qualities as soon as possible. The government and society should educate the majority of young people in loving their motherland and hometown in relevant aspects, and help them learn the Party's policy of enriching the people and the ideological morality and code of conduct suitable for the development of the socialist market economy. We will continue to carry out the education of "thinking of the source of wealth and thinking of progress when we are rich." In order to cooperate with the modernization and the development of information technology, efforts should be made to establish a standardized and sound training network and a training base through multiple channels and levels. According to the actual situation, efforts should be made to catch up with the development of the city.