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Data Poisoning Attack: This involves inputting antagonistic training data into the classifier. The most common type of attack we observe is model skew. Attackers pollute training data in this way, making classifiers tilt to their preferences when classifying good data and bad data. The second attack we have observed in practice is feedback weaponization, which attempts to abuse the feedback mechanism to manipulate the system to misclassify good content as abuse (e.g. Competitor's content or part of retaliatory attacks).尹旭迟疑了，刘邦此人善变，骗人更是出了名的，敢相信吗？他来回在营帐中踱着步子，思索那段历史。And then threw it in the heart of the Sahara Desert,徐风知道季木霖是真的有些恼怒，所以一晚上也没去打扰他，但是临睡前，他还是像以前一样去敲了他的房门，毕竟习惯这种东西，一旦养成了就很难改掉。1884年法国欲吞安南（即越南），夺我西南。清廷畏于压力，准备放弃安南，黑旗军首领刘永福为保桑梓，拒不听旨，与朝廷传旨小官唐景崧并肩战斗，率兵大破法军。李鸿章怀有私心，匿捷不报，反而夸大法国实力，渲染失败。清廷签下不平等条约。使中法战争“不败而败”。唐景崧因功升任台湾道，刘永福则率领黑旗军改编为官军，任南澳岛总兵。转眼十年，日本野心毕露，海陆两路进攻中国。李鸿章为保实力，欲与之议和，结果水师全军覆没，继而签订了卖国的《马关条约》。台湾军民，群情激奋。唐景崧为保官禄，唯命与朝廷。而刘永福率军渡台，团结台湾志士和同胞，坚决血战保台，不幸，台湾沦陷了，但台湾人民抗击日军的斗争延续多年。回归祖国的信念一如既往。The propagation of events is directed. When a button is clicked, the event generated starts to propagate upward from the button (just like a blister comes up from the bottom of a cup, which is why it is called event bubbling), but this event always looks for whether a specific attribute has a value. For example, the click event of a button first looks for a meaningful definition of whether there is an onclick attribute on the button (i.e. The attribute points to an existing function or an executable statement), and if so, executes the function or statement; The event then continues to propagate up to the upper layer object of the button (for example, a form object or document object, which in short contains the parent object of the button). If the object also defines the onclick attribute, the value of the attribute is executed.