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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)."It is incredible to dig so fast, I can also imagine how bad your situation was then. The "killer bees" all over the sky are already very difficult to deal with, Hitting the body can kill people with almost one blow. Two or three big mice can bite off people's limbs. The few besieged one person, which is even more destructive than wolves. However, judging from the history of the war, although the 149 position was hit hard, it finally successfully completed the defensive task. How did you do it? Or how did I get out of trouble? "I wrote down the key points before, stopped writing and then asked.梅子姓秦，乃郑家隔壁邻居李长明之妻，人称她为敬文娘，因为她大儿子叫李敬文。很多人死的时候都没搞明白到底是怎么回事？便做了刀下冤魂。平武根本抽不开身前去救援。香港回归二十五年，故事围绕一个奋斗家庭作为社会缩影。警员叶国栋（陈山聪饰）被委任为七一回归庆典的升旗手，却于出场前弄伤手臂，未能履行升旗职务，恰巧太太孙卓岚（唐诗咏饰）在回归日诞下儿子家梁（朱敏瀚饰），弥补了内心遗憾。回归数年，香港经历高低起跌，零三年沙士来袭，卓岚诞下幼女嘉雯（刘颖镟饰），一家人迎难而上。时光飞逝，家梁长大后背包游时遇上暴乱，幸得国家在危难中守护。看到国旗飘扬，家梁立志成为警察，守护香港，更盼望能代父亲完成当年的升旗手心愿……After proxy!