在墨西哥首都墨西哥城东北部约50千米处有一座特奥蒂瓦坎古城。据考证，公元6世纪。公元7世纪是特奥蒂瓦坎城的全盛时期，是当时世界屈指可数的大城市之一。据估计，居民有20多万人
Yttria-Stabilised Zirconia (YSZ) coatings were deposited on a T-91 boiler steel. NiCrAlY was used as bond coat and YSZ as top coat. Hot corrosion studies were c
A transparent polymer based solar cell was designed and fabricated to utilize the solar energy when exposed to sunlight. The transparent solar cell for window m
This paper utilized the compressive tests results to establish some critical mechanical properties and crashworthiness parameters that may be required to design
Zinc tris Thiourea Sulphate (ZTS) is a semi organic non-linear optical crystal. The ZTS and phosphate mixed (in different mol %) ZTS crystals have been grown fr
<正>习近平总书记在党的十九大报告中指出:"不断增强党的政治领导力、思想引领力、群众组织力、社会号召力,确保我们党永葆旺盛生命力和强大战斗力。"新时代对党员干部领导能
The interactions among fine particles are unavoidable in solutions, and the strong particle interactions have a negative impact on mineral separations. How to r
摘 要：新课改小学语文教学要突显一个核心——以人为本；把握四个规律——工具性与人文性统一的规律，学生主体性的规律，注重感悟的规律，尊重学生多元解读的规律；抓住三个关键环节——准确、深入地解读文本，精心进行教学设计，扎实有效、灵活机动地实施教学。 关键词：课改；小学语文；规律；思考 中图分类号：G623.23 文献标识码：A文章编号：1009-010X（2008）06-0028-04 新课
摘 要:在小学数学教学中,教师应创设各种情境,以引导学生感悟生活与数学的联系,带领学生体验合作与成功的乐趣,培养学生探究与创新的能力,同时,注重各种资源的整合与运用,充分地为学生营造良好的学习环境。 关键词:情景创设;价值导向;创新意识 中图分类号:G623.5 文献标识码:A 文章编号:1009-010X(2010)10-0054-02 现代教育论认为:教师的教,只是学生学习的外因,这
The production cost of flexible polyurethane foam is significantly dependent on the cost of polyol, which constitute the largest percentage of materials used in