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The attacker sends a large number of HTTP messages to the target server through proxy or zombie host, requesting URI (Universal Resource Identifier) related to database operation or other URI that consumes system resources, causing the server to run out of resources and cannot respond to normal requests. For example, HTTP Flood attacks often occur on portal websites. The biggest feature of attacks is to select URIs that consume server CPU or memory resources, such as URIs with database operations.老琴师在归途中病倒在荒村渡口，渔家少年留老人在自己的茅舍里歇息，老人感到宽慰。翌日，老人病体康复，取出古琴，弹奏一曲，琴声把少年引到他的身边。少年学艺心切，老人诲人不倦，两人结为师徒。秋去春来，少年技艺大进，老人十分欣喜。但慰藉之余，思虑如何使弟子更上一层楼。一日，老人偶尔看到雏鹰离开母鹰独自展翅翱翔的情景，豁然开朗。于是携少年驾舟而去，经大川而登高山，壮美的大自然，使少年为之神往。临别时，老琴师将心爱的古琴赠送给他，然后独自走向山巅白云之间。少年遥望消失在茫茫山野中恩师的身影，顿时灵感突来，他盘坐在悬崖峭壁之上，手抚琴弦，弹奏着心之曲，倾吐着对人生的赞美，悠扬的琴声在山间回响秦淼慌忙问：板栗哥哥，外面怎么样？小葱一把拉住她：先出去。The load event is usually used to detect whether the document content or picture has been loaded.这是一个关于“无心女孩”Ana的故事。她三十出头，单身，却总是做一个“过渡期女友”，身边的女孩来了又走，走了又来。Ana说，我是一个无心女孩，我只会为在乎人的停留。她冷漠，总是拒人千里之外，直到Lucía的出现，才逐渐揭露了“无心女孩”Ana的旧伤：原来她一直为前女友Álex的离开而自我封闭着。看似很渣实则痴情满满的Ana到底会接受新鲜肉体Lucía，还是会挽回昔日白月光Álex呢？剧中皆会揭晓。（VIA:悸花）Through the analysis of event binding, it will be found that no matter whether the event triggered during the bubbling phase is registered or finally called, it will also be found that the event is already in the process when the event handler function is not executed. Does that mean that the call cannot prevent the event from bubbling?