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When setting up a network, the selected network cable must have flame resistance to reduce the probability of fire. Generally, the rubber outside the real network cable is flame-resistant, which is a national mandatory standard. However, fake network cables are often made of common flammable materials. When we buy network cables at ordinary times, we can also use this feature to identify the authenticity of network cables.Open the course of "Gem Processing Technology", It is found that it is based on "Gem Processing Technology" written by Professor Liu Ziqiang of Jewelry Department of Jinling Institute of Science and Technology. Including six aspects of knowledge-a preliminary understanding of some gemstone raw materials, Understand the names, characteristics and development history of different gemstone cut styles, understand some basic equipment and accessories for gemstone processing, understand the processing principles and technological methods of gemstones, see the processing process of standard round polyhedral styles, and learn the processing quality evaluation of gemstones (including jadeite).讲述的是一个卧底的故事，而非寻常的江湖奇遇，恩怨传奇。 主人公就是一正一邪的两个卧底，一个是卧虎，一个是藏龙，他们的悲凉命运以及刚烈抉择，是全剧跃动的脉搏。　　沉眠着现在的人类无法制造的贵重遗物。嘉靖在位时，臣子们献香献炉，恨不得表现得多么虔诚，现如今，剩下的唯有记恨与鄙夷。Public class MyIterator implementations Iterator {Salvia officinalis