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2、精神创伤TCB (TCP? Transport Control Block is a transport protocol data structure that contains all the information of the connection (in fact, in many operating systems, it is a queue used to process inbound connection requests. The queue holds TCP connection items that are in a half-open state and items that have established a full connection but have not yet been extracted by the application through an accept () call). The amount of memory occupied by a single TCB depends on the implementation of TCP options and other functions used in the connection. Usually a TCB has at least 280 bytes, which in some operating systems has exceeded 1300 bytes. The SYN-RECEIVED state of TCP is used to indicate that the connection is only half open, and the legality of the request is still questioned. An important aspect worth noting here is that the size of TCB allocation space depends on the SYN packets received-before the connection is fully established or the return reachability of the connection initiator is verified.　　面对国际对于外太空资源抢夺形势的加剧，中国政府决心在太空建立永久性空间站，而宇航员正是这项任务的重要执行者。张天聪不仅是新一代航天员的教官，同时也是他们的竞争者。怀揣着“飞天”之梦的张天聪与所有航天员一起经历着种种常人所不能想象的训练。为了进行失重训练，航天员们远赴俄罗斯加加林航天中心，出色的训练成绩赢得了俄罗斯、美国等同行们的尊重。//WrittenThe way to arouse curiosity is to directly explain the situation or ask questions to potential buyers at the beginning of the meeting, deliberately say something that can arouse their curiosity, and lead their thoughts to the benefits you may provide them. For example, a salesman handed a note to a customer who refused to see him many times, which said, "Will you please give me ten minutes? I'd like to ask your opinion on a business question. "The note aroused the curiosity of the purchasing manager-what questions did he want to ask me? At the same time, it also satisfied his vanity-he asked me! In this way, the result is obvious, the salesman was invited into the office.需要出去吗？死在别人的屋子里终究不好。4. SingleInstance