共查询到20条相似文献,搜索用时 78 毫秒
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《科技文萃》2000,(2)
1 我国载人航天工程第一艘试验飞船飞行成功 11月20日6时30分,我国第一艘载人航天试验飞船"神舟号",在中国酒泉卫星发射中心新建成的航天发射场升空.这是我国载人航天工程的第一次飞行试验,标志着我国载人航天技术有了新的重大突破.这次发射的试验飞船和新型火箭,是我国独立自主研制的.以中国航天科技集团所属的空间技术研究院、上海航天技术研究院和运载火箭技术研究院为主研制.中国科学院、信息产业部等部门参加了研制、试验工作.这次飞行试验,飞船上没有载人.在地面准备阶段,发射中心采用了与国际先进水平接轨的"三垂"模式,即在技术厂房完成对飞船、火箭联合体进行垂直总装、测试,然后将其垂直运输至发射场.飞船、火箭的最后测试和发射,都是通过远距离控制的. 相似文献
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张建国 《数理化学习(高中版)》2004,(11)
我国从1999年11月20日以来先后成功发射和返回自行研制的“神州”一号至四号无人试验飞船后,终于在2003年10月15日在酒泉卫星发射中心,利用自行设计的“长征二号F”捆绑式大推力运载火箭成功发射了“神舟”五号载人宇宙飞船,飞船顺利升空,在环绕地球飞行了14圈后,于2003年10月16日凌晨6时23分,成功着陆在内蒙古中部预定地区.“神舟”五号载人飞船的成功发射和返回,表明我国已经掌握载人航天技术,标志着我国空间科学研究和空间资源的开发进入了新的发展阶段. 相似文献
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城市精神不是一个空泛的东西,它体现了城市中的人所具有的精神风貌,具体地说,它至少包括平等、契约、宽容、创新与共生等诸方面观念,这些观念则要通过教育获得. 相似文献
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姜振华 《内蒙古师范大学学报(哲学社会科学版)》1996,(3)
听、说、读、写这个顺序是人们学习第一语言的基本顺序。读、说、听、写则是人们学习第二语言的顺序。第二语言的学习是在母语的符号思维系统已经建立起来并相当牢固之后开始的;第二语言的学习是在一种自觉状态中进行的,是一种有意识的学习。母语在第二语言的学习过程中起着极其重要的作用。双语共存的教学本质上是一种比较型教学。 相似文献
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E. J. Capaldi Donna R. Verry Timothy M. Nawrocki Daniel J. Miller 《Learning & behavior》1984,12(1):7-20
Two experiments indicated that two approaches to serial learning are too extreme—the classical view that it consists only of interitem associations and various recent views that it involves no interitem associations. The novel assumption introduced here was that phrasing cues, normally conceptualized as merely segregating long series into smaller units or chunks, may also enter into associations with items, thereby reducing interitem interference and facilitating serial learning. It was found that one item could become a signal for another item, an interitem association, or be overshadowed by a phrasing cue, such as a brightness and temporal cue, also signaling that item. The items were .045-g pellets. Rats traversed a runway for items arranged in ordered series, 14-7-3-1-0 pellets (Experiment 1) or 10-2-0-10 (Experiment 2). Complete tracking of, for example, the 10-2-0-10 series would consist of fastest running to 10 pellets and slowest running to 0 pellets. In both investigations, the interitem association overshadowed was that between 0 pellets and the subsequent rewarded item, 0 → 14 (Experiment 1) or 0 → 10 (Experiment 2). Either repetitions of the 14-7-3-1-0 subpattern (Experiment 1) or merely the terminal 10-pellet item (Experiment 2) were phrased, both methods producing identical results. Overshadowing the 0-pellet item produced superior serial learning, more rapid extinction, and, in Experiment 1, considerable elevation of responding when the brightness phrasing cue was introduced in extinction, an effect said to be conceptually identical to spontaneous recovery and one demonstrating directly that phrasing cues are in reality overshadowing cues. It was suggested that many effects attributed to forgetting may be due to unrecognized overshadowing of memory cues by phrasing cues, giving rise to exaggerated estimates of forgetting. 相似文献
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Ian Winchester 《Interchange》2008,39(4):389-390
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王军 《四川教育学院学报》2004,20(6):68-69
阅读教学的目的是指导学生在阅读实践中学会阅读的方法,进而提高阅读能力。在阅读教学过程中,应加强速读和精读的训练,把阅读课与语言分析结合起来,让学生掌握科学的阅读方法,形成良好的阅读习惯,从速读中获取语言信息,从精读中吸收语言精华,不断提高语言字水平。 相似文献