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2Identify the problem《数学小先锋》（Cyberchase）是一部寓教于乐的系列动画片，它题材新颖，内容互动，充满了引人入胜的数学挑战环节。这部动感十足的动画片为我们讲述三位主人公Jackie、Matt和Inez如何前往虚拟的网络世界，阻止邪恶黑客企图掌控网络空间的计划。该片将为小学生们展示数学的趣味性和实用性，告诉我们学好数学能够在需要你拯救世界的时候派上用场。At present, the per capita production of municipal solid waste in China is (0.8 ~ 1.3) kg/person & dot; D, 1.1 kg/person & dot; D is the basis for design (including all the population living in the region). At present, in cities that have built incineration facilities in China, the low calorific value of domestic waste is mostly around 5000kJ/kg, and the water content is generally greater than 50%. Compared with cities in developed countries, it is characterized by low calorific value, high water content, large changes in composition, certain difficulties in garbage incineration, and low thermal efficiency of garbage incineration boilers. In terms of steam parameters, the steam parameters of waste heat boilers in waste incineration plants are usually medium temperature and medium pressure parameters (4MPa and 400 ℃).商议一番之后，刘邦先去了宋义表示慰问，当然还得装的病怏怏的，紧接着又马不停蹄赶来探视尹旭。故事是以原作为基础的原创剧情。在男子学校－藤森学园有个公开的“公主”制度，就是让外表长的漂亮的学生打扮成女孩子的样子，以给校园生活增添情趣。以被选作为“公主”的丰实琴、四方谷裕史郎、河野亨的3人为首，由有个性的成员展现的每一天在某一天发生了变化。转校生花园音也设立了新的学生会，并率领对抗公主的“黑公主”，向原来的公主发起了挑战。在这里，学生会和新学生会，公主和黑公主的美丽又激烈的战争就此开始……As shown in FIGS. 1-3, a low temperature stop valve comprises a valve body 1 and a valve cover 2, wherein a valve stem 3 is arranged in the valve body 1, a valve disc 4 is arranged at one end of the valve stem 3, an adjusting handwheel 5 is arranged at the other end of the valve stem 3, a guide sleeve 6 is arranged at the lower part of the valve disc 4, the guide sleeve 6 is fixed by a connecting piece and a spring pad 8, and a valve seat 7 is arranged between the valve disc 4 and the guide sleeve 6.