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Centos7, The service is no longer started using init-style scripts, Instead, the unit file is used, Therefore, commands like service iptables start can no longer be used in centos7, Therefore, service iptables save cannot be executed. At the same time, firewall is used to replace the original iptables service in centos7, but don't worry, we just need to install iptables and iptables-services through yum source (iptables are usually installed by default, but iptables-services are not installed by default in centos7). After installing iptables-services in centos7, the rules can be saved by the service iptables save command, as in centos6, and the rules are also saved in the/etc/sysconfig/iptables file.　　黄克强和青梅竹马阿男（叶童 饰）两情相悦，无奈阿难的父亲却要将阿男嫁给她并不喜欢的富家子弟，黄克强和阿难决定私奔。然而，就当三人跃跃欲试之际，战争爆发了，出国的计划再次流产。之后，阿男惨遭巡警强暴，黄克强终于得到了阿男父亲的认可，而叶剑飞则成为了“日军太保”，至此，三人依然没有忘记当初的约定，他们登上了难民船，开始了他们最后的旅行。　 一件事情阻止了他们的计划。一个两岁的孩子，被称作“狡猾的斯莱”，从她秘密的实验室里跑走了。他的出逃对他们的研究和计划有很不利的影响。在斯莱躲避To enter oneself for an examination in the flight college, one must first have two physical examinations 2 or 3 months before the college entrance examination. The first is the preliminary examination, which is generally divided into four major subjects: ophthalmology, otolaryngology, surgery and internal medicine. Applicants are generally required to check ophthalmology first, because ophthalmology has the highest elimination rate. Most applicants will be eliminated in this subject, and future subjects will not have to be checked. When I applied for the examination that year, there were 10 boys in the whole school. As a result, 7 boys were brushed off in the first round of ophthalmology. Ophthalmology mainly examines vision and fundus, requiring normal vision and free from myopia, hyperopia, trachoma and other diseases, as well as color blindness, color weakness and other defects. Pilots use a special "C" table to check their eyesight, with 8 directions. It is far more difficult than the "E" table.Gossip Girl是曼哈顿上东区最神秘的人物，她是我们了解上流贵族巨细无遗的生活的唯一来源，且拥有一众随时随地为她提供八卦消息的公子哥千金女。而今年最重要的新闻，莫过于Serena Van Der Woodsen（Blake Lively 饰）在车站下车。这意味着这位曾经的学校女王、一年前谜一样消逝的风头人物，重回大家的生活，激起千层浪。第一个浪花来自Blair（Leighton Meester 饰），她和S曾经是最好的朋友，然而一年前好友的不辞而别彻底伤了她的心，如今回归给她的女王地位带来威胁。敌对，在一开始就成为她们友谊的立场。Blair的男朋友Nate（Chace Crawford 饰）对S怀着非同一般的感情，这让B更加敏感。Nate的好友Chuck素以花花公子著称，是不折不扣的二世祖。与这些富家子弟形成鲜明对比的，是出身布鲁克林的Dan（Penn Badgley 饰）和Jenny，Dan坚信用学识和努力可以战胜出身得到自己应得的一切，而小Jenny则不可避免地，像她那个年龄段的女孩子一样，受到虚荣的招手诱惑，渴望成为Blair那样的焦点女王。S当年出走的原因是什么，B和N的感情是否能瓜熟蒂落，D又会跟这些上流社会的人们发生什么纠缠，J是否如她所愿踏进上流殿堂，还有他们的家庭和父母，这一切，都由gossip girl为你细细道来，绝无遗漏。