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3. Prevent only one event from blistering by using the stopPropagation () method.However, there is actually another way to make the delegate execute the method, and that is: delegate variables (parameter lists)　　不过，他这次返乡的前提是：谢绝媒体打扰。到达布宜诺斯艾利斯之后，他坐着一辆破车，经历好一番波折才最终来到小镇，收到了市长的热情欢迎。A large number of SYN requests cause the unconnected queue to be full, making the normal TCP connection unable to successfully complete the three-way handshake. This pressure can be relieved by increasing the space of the unconnected queue. Of course, backlog queues need to take up a large amount of memory resources and cannot be expanded indefinitely.中日战争硝烟笼罩下的上海租界依然歌舞升平，纸醉金迷，成为唯一没有沉没的孤岛。然而，空前繁荣的背后，却是危机四伏、暗流涌动。百乐门舞厅的舞后茉莉在疯狂一夜之后，于次日被发现死于她的寓邸之中。一大早，吴飞即被法捕房的探长陈书惊扰，告知舞女茉莉被杀。吴飞是租界里小有名气的私家侦探，曾协助陈书屡破大案、奇案。吴飞急速赶往案发现场，据初步调查，嫌犯锁定为百乐门的常客、茉莉的富商相好王中任。These two scripts are both used to detect the input of the user's direction keys. Execute the following to see what is the difference between them. The difference between them is that the former can respond to the input of multiple keys at the same time, such as holding down the up key and the right key at the same time, and the character can move diagonally. However, the latter belongs to the event building block of response class and can only respond to one demand at the same time and can only move in one direction.