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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.Surname is a sign and symbol that indicates a person's family and blood relationship. The descendants of the same ancestor are called clans. Surnames originated from the name of the tribe or the name of the tribal leader. Its function is mainly to distinguish the descendants of different clans in the tribe and to facilitate intermarriage between different clans. Therefore, the emergence of surnames marks the change from group marriage to blood marriage and is an important milestone in the progress of human civilization.佐藤智子（筱原凉子 饰）与丈夫以及就读幼儿园的儿子一起过着平凡的生活。智子由于双亲失踪，自暴自弃而高中辍学。之后虽然在许多地方来来去去，但她下定决心绝对不要跟父母一样，而是努力地认真过生 活。后来她在打工的地方认识了现在的丈夫，完成人生大事。但身为打工族的丈夫不断在换工作的轮回中渡过，最后还是由智子的微薄薪水支撑家计。但智子却因为在职场上的冲突而遭到解雇。在得知市议员中选率高且年薪可观时，她决定出马参选议员……那能一样吗。哪里，什么镇抚，不值一提，叫我老丁就好了。No cards can be inserted, they are all built-in.这样的事情之前是发生过的。