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正有此意。During the establishment of a tcp connection, If the server returns syn and ack messages, The client does not confirm it for some reason. This is because the server needs to retransmit the syn + ack message and wait for the client's confirmation message until the tcp connection timeout. This state of waiting for the client to confirm the connection is usually called a half-open connection. The half-open connection will be kept in the connection table of the server until the connection is disconnected.After review, the fire protection technical service institution no longer meets the qualification conditions, or has violated the provisions of Article 47 and Paragraph 1 of Article 50 more than three times within the validity period of the qualification certificate, shall not go through the renewal procedures. 玛雅是一部神秘的惊悚小说，讲述了伊卡洛和阿德里安娜之间的故事，从他们相遇的那一刻起，直到她消失，不复存在的那一天。/shindig (Carnival)Compared with the example of electric lights, file uploading differs in that it will now face more complicated conditional switching relationships. In the example of an electric lamp, the state of the electric lamp is always from off to on and then to off, or from off to low light, low light to strong light, strong light to off. ABCA always seems to follow the rules, so even if you don't use the state mode to write the light program, but use the original if, else to control the state switching, you won't lose yourself in logic writing, because the state switching always follows some simple rules.Obvious advantages of offline mechanisms: