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First, Cat5 is referred to as Category 5 and Cat6 is referred to as Category 6. The difference between the two lies in the different spacing of twisted pairs. CAT5 has relatively large spacing, CAT6 has relatively tight spacing and the transmission rate is much higher than CAT5E.徐坦性格腼腆，从小在热爱乒乓的爷爷影响下，为强身健体开始学习乒乓球，后在面临离开乒乓球时被伯乐发现，通过严格的技术、体能及心理指导，最终克服种种苦难与压力，成为队里技术最全面、最令人信赖的绝对主力。于克南性格桀骜不训，从小跟随前乒乓国手父亲学习打球，自小立志成为世界冠军，在乒乓道路上始终高歌猛进，自信又骄傲，被认为是天才型球员。两人一同成长，剧集选取徐坦和于克南为主要切入点，照见一代运动少年以热血和拼搏为主基调的钢铁青春。徐坦作为“成长型选手”，屡败屡战不被看好，却能顶住压力，奋力生长；少年之“刚”，在义无反顾，“天才少年”是褒奖也是负累，于克南却可不顾外界流言，一往无前；少年之“刚”，在利刃出鞘，以徐坦和于克南为代表的运动员们，在赛场上挥洒汗水，全力迎战。Chapter IV Supervision ContentsThe third is that due to the low sense of scene in online learning and the weak restriction on students, the completion rate of students may be relatively low.Especially at the arch of the foot, 260D rubber bands are used to realize the compression function, which makes the arch of the foot more comfortable and avoids blisters caused by friction.本剧讲述的是：三流人生活着的男主人公为了挽救必须进行心脏移植的财阀集团独生子而卷入阴谋，有一天以财阀集团长子身份过上新生活。但是意识到被操纵的事实后与世上不正之理作斗争的故事。(two) no longer meet the qualification conditions, after being ordered to make corrections within a time limit did not make corrections or continue to engage in the corresponding social fire technical service activities during the correction period;