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SkiingIndustry experts said that 5G mobile phones will enter large-scale sales, possibly by 2020. However, 4G smart phones are still the main sales force in the mobile phone market this year.1. Download iTunes on the computer first. After iTunes is downloaded, it will remain turned off. Then the mobile phone will be turned off and connected to the computer through the data cable.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).个性迥异的姊妹，相依为命、各自人生。“乌衣巷外明眸月，夫子庙前情侣舟。千载艳声随梦去，一壶老酒品春秋。”