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For example, I now need to create a div element on the page. Then we definitely need a function to create the div, Now all I need is this function, which is only responsible for creating div elements. It doesn't want to take care of the rest, That is, to realize the principle of single responsibility, Just like Kissy on Taobao, At the beginning, they defined Kissy to do only one thing and did it well. The specific instantiation class in the monomer mode was handled by the agent function. The advantage of doing so was that the specific business logic was separated. The agent only cared about the business logic of the agent. Here, the function of the agent was to instantiate the object and instantiate it only once. Create div code just create div, the others don't care; The following code:活泼开朗的高海千歌（伊波杏树 配音）、成熟冷静的樱内梨子（逢田梨香子 配音）、大大咧咧的松浦果南（诹访七香 配音）、傲娇冷漠的黑泽黛雅（小宫有纱 配音）、运动万能的渡边曜（齐藤朱下 配音）、二次元少女津岛善子（小林爱香 配音）、温婉内向的国木田花丸（高槻加奈子 配音）、混血大小姐小原鞠莉（铃木爱奈 配音）和胆小懵懂的黑泽露比（降幡爱 配音），这九名性格各异的少女，她们小小的肩膀上背负的，是闪耀着万丈光芒的理想。《DOCTOR White特别篇》将于3月28日22点15分在关西电视台·富士电视台播出。SYN attack is a kind of DOS attack. It takes advantage of TCP protocol defects and consumes CPU and memory resources by sending a large number of semi-connection requests. SYN attacks can not only affect hosts, but also harm network systems such as routers and firewalls. In fact, SYN attacks can be implemented as long as these systems turn on TCP services no matter what systems are targeted. As can be seen from the above figure, the server receives the connection request (syn=j), adds this information to the unconnected queue, and sends the request packet to the client (syn=k, ack=j+1), then enters the SYN_RECV state. When the server does not receive an acknowledgement packet from the client, it retransmits the request packet and does not delete this entry from the non-connection queue until the timeout. With IP spoofing, SYN attacks can achieve good results, Typically, clients forge a large number of non-existent IP addresses in a short period of time, SYN packets are continuously sent to the server, and the server replies to the confirmation packets and waits for the confirmation of the customer. Since the source address does not exist, the server needs to continuously resend until it timeout. These forged SYN packets will occupy the unconnected queue for a long time, normal SYN requests will be discarded, the target system will run slowly, and in serious cases, the network will be blocked or even the system will be paralyzed.　　主人翁(胡兵饰)殷雄是个刚踏入美发行业的菜鸟美发师，有一天在上班的路上不慎撞死了正要和女主角吕霞(陈好饰)初次见面的父亲。杨长帆笑着卸铳，错开一步，给你个机会，砍得过他饶你一命。