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1921年8月1日，浙江，嘉兴，南湖。《神奇校车》是美国国家图书馆推荐给所有学龄前儿童和小学生的课外自然科普读物，是全美最受欢迎的儿童自然科学图书系列之一。1994年，美国Scholastic集团将其改编成动画片推上银幕。在一次次不可思议的神奇之旅中，让孩子们体验原理、学会操作、懂得思考、爱上科学。3. Channel goods, the original factory has no standard. The purchase price is more than ten dollars cheaper, and it is cheaper to take more. Compared with 2, there is no mark, and the rest is no different.　　而大家辛苦带回的血如意，被豆豆故意摔碎（试其真假），竟冰封了整个水月洞天。童博、童战、豆豆和博学多才的神医隐修，侥幸逃过一劫，四人不得不离开水月洞天，周大来报：公子，都已经解决了，这些粮食用我们用几个月呢。According to statistics, SYN attack is the most common and easily used attack method among all hacker attacks. I believe many people still remember the attack on YAHOO website in 2000. At that time, hackers used simple and effective SYN attacks. Some network worms cooperated with SYN attacks to cause greater damage. This paper introduces the basic principle, tools and detection methods of SYN attack, and comprehensively discusses the prevention technology of SYN attack.