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Third: Distinguish the responsibilities of the class. What this class does must be implemented in this class, and what my class should not do must be implemented by other classes.剧情是讲述於1980年代发生连续杀人案件，由崔振赫所饰的资深警察於追查过程中穿越了隧道，来到2016年的现代，和尹贤旻所饰的刑警、李宥英所饰的犯罪心理分析师携手追案，进而破了30年前的女性连续杀人悬案。ABC宣布续订长寿喜剧《中之道 The Middle》第9季，根据Deadline指所有演员皆签下一年新约。People have studied SYN attack prevention technology earlier. To sum up, there are mainly two categories, one is through firewall, router and other filter gateway protection, the other is through strengthening TCP/IP protocol stack protection. However, it must be clear that SYN attacks cannot be completely prevented. What we have done is to reduce the harm of SYN attacks as much as possible unless TCP protocol is redesigned.叶卡捷琳娜正在进行激烈的权力斗争，宣布战争，镇压叛乱……在她的肩上-一个沉重的负担的权力。俄罗斯的命运掌握在她的手中。一九五零年，蒋介石集团借美国入侵朝鲜之机，派遣大批特务潜入内地制造混乱。以“血狐狸”钱孝义为头目的特务小组潜入重庆，准备实施一系列破坏活动。获悉情报后，解（河蟹）放军迅速成立了侦破小组并任命侦察科科长雷启明为组长，雷启明设伏八仙庵，但因侦察员的身份暴露而打草惊蛇。为了彻底消灭敌人，雷启明吸取教训，改变策略，利用“血狐狸”与“狼”互不相识且还未接上头的条件，假扮“狼”张为农，进入山中，深入虎穴与敌战斗。凭胆识和机智，雷启明赢得了以叶兰香为首的匪徒的信任，并顺利抓获前来与血狐狸接头的“狼”张为农。而同时也藏在山中的“血狐狸”识破了雷启明的身份。血狐狸在其同伙的帮助下，绑架了雷启明的妻女，雷启明深入虎穴，救出妻女，并全歼了敌特，保卫了和平。On one occasion, the chief contractor of the project had a conflict with the boss of the company and sent thugs to the construction site to prevent the construction. The boss panicked and did not know how to deal with it. "(Solving problems) is my mission." Recalling the incident, Allie's words were still full of murderous look. She found dozens of retired armed police, armed with electric batons and equipment, and the "thugs" were scared away before they started work.