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　　农民生儿传香火，赚了女娃还赔金，夫妻冤家，爱！The principle is that syn messages are first responded to syn_ack by DDOS protection system. With a specific sequence number (recorded as a cookie). The real client returns an ack and the Acknowledge number is cookie+1. The fake client will not respond. In this way, we can know that the clients corresponding to those IP are real and add the real client IP to the white list. The next access passes directly, while other forged syn messages are intercepted. The following is a schematic diagram of protection:?北京知青梅雁，在山西某个中学做着数学老师，她不但独自带着6岁的女孩梅阿娜，而且这孩子还来路不明，没有人知道她的背景，对她的猜测和不好的传言非常多……同为知青的毛毛老师一直深深爱着梅雁，由于他已结婚，只好将这份情感深深地埋在心里，但他经常照顾梅雁和阿娜，这一切却惹来了毛毛媳妇的疾恨，和别的人的猜疑，由于梅雁独身一人，又长得漂亮，学校校长对她垂涎三尺，经常把她叫到办公室，动手动脚，进行性骚扰，但都被梅雁推脱……项羽起身随后，知道范亚父要出门去，赶忙为您披上一件貂皮大衣。虽然最后以人类方的胜利收场，但是残留下来的嗜血种却还是存在于这个世界上….。最终，人类凭着人造血液及被称为“D-GPS”的嗜血种管理系统，来保障嗜血种的生存权利。7, and so on, divided into the first, second and third places