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101.
通过对体育教学现状的分析,论述了在大的教育改革的影响下,体育教学改革的核心是思想和观念的变革,指出了体育教学迎合素质教育观念的改革措施。加强自身学习使教师知识结构从单一结构向复合结构转变;转换角色发挥教师的主导作用,实现“导”的真实价值;唤起学生参与意识变被动式教学为主动式教学;打破传统的教学模式建立多样化新的教学模式。 相似文献
102.
本文讨论了小球受到线性阻力时的竖直上抛运动,定量计算了小球上升的速度、高度、最大高度,上升时间与下落时间的关系。并与无阻力时的结果进行了比较。 相似文献
103.
Chen Han-lin Zeng Hua-sheng Shen Xiao-hua Yang Shu-feng Zhang Guoc-cheng Xiao Wen-jiao Li Ji-liang Zhao Dong-dong 《浙江大学学报(A卷英文版)》2000,1(4):431-436
The authors’ analysis of the chemical components and sedimentary characteristics of the well developed Triassic strata in
the southeastern part of western Kunlun Shan led them to conclude that the sediments comprise a set of typical deep-water
to semi-deep-water flysch that formed in the passive continental margin of the Qiangtang Block. This suit of strata had undergone
strong deformation giving rise to a SW-thrusting duplex, imbricate fans, high-angle thrust fault, recumbent fold, SW-inverted
fold, etc.. The deformational intensity weakens gradually southeastward. This is a foreland fold and thrust belt caused by
the collision between the Qiangtang Block and the island are on the southern margin of the the Tarim Plate at the end of late
Triassic.
The sedimentary and deformational characteristics of the Triassic strata were used to reconstruct the evolution of this foreland
fold and thrust belt as proposed below. Before the end of Triassic, this region was a passive continental margin in the north
of the Qiangtang Block. The end of Triassic to Jurassic was a stage of thrusting, folding, uplifting and development of the
foreland basin. The evolution of the fold and thrust was completed in Cretaceous.
Project supported by NSFC (49872073) and Key Project of NSFC. 相似文献
104.
质膜对物质的通透性由膜和物质本身的属性来决定,脂溶性和分子直径不同的物质通过不同方式实现跨膜转运。本文综述了特跨膜转运的几种机制及春最新研究进展情况。 相似文献
105.
在自由主义传统中,公民资格意味着一系列的权利以及对权利的获得和占有,在个体和共同体的关系上,强调个体性对于共同体之先在性,主张个体不应受共同体过多的限制,公民资格意味着一种法律地位以及法律上对权利的消极保护,公民特征体现为消极公民和消极自由。古典自由主义的这种公民资格观念尽管在学理上承诺了自由和平等,然而却无法在实践上兑现,不可避免地造成原子式的个人以及对共同体价值的忽视。 相似文献
106.
ABSTRACT Adsorbent materials can be used for the removal of organic acids from air in storage rooms with heritage collections. The organic acid removal efficiency of two commercially available activated carbon air-filters were tested in situ in two unoccupied stores with densely packed collections. One filter was designed for outdoor type pollutants (Filter A), while the other was designed for organic acids in indoor air (Filter B). Furthermore, the acetic acid removal efficiency of a desiccant silica gel rotor used for dehumidification was measured in a laboratory at different relative humidity levels. Finally, passive removal of acetic acid by silica gel and unfired clay brick were tested in a chamber, and for clay brick at room level as well. Filter B had the highest removal efficiency. The removal efficiency of both filter types depended on the airflow and the filter performance varied considerably in situ from the values reported from standard laboratory tests. Increasing the filter airflow reduced the removal efficiency from 77% and down to 7% for Filter A, and from 92% to 24% for Filter B. There was almost no effect of active air filtration on the concentration of organic acids when this was measured in the middle and in the corner of the storage rooms away from the ventilation inlets. The desiccant dehumidifier removed 98–100% of the acetic acid from the air, independently of the relative humidity. The desiccant rotor will, however, only be running when there is a need for dehumidification and as a result will only periodically remove pollutants. The high acid removal efficiency by dry silica gel was furthermore demonstrated in a chamber test. A clay brick wall in a test room established a concentration gradient across the room and reduced the concentration of organic acids by 56% compared to close to the emission source. 相似文献
107.
英语词汇教学探讨 总被引:1,自引:0,他引:1
刘春燕 《天津职业院校联合学报》2005,7(1):105-107
词汇教学是英语教学中的一个重要环节,但往往被教师所忽略。如何有效地进行词汇教学是教师面临的一个课题。方法得当,则事半功倍。 相似文献
108.
王松华 《邵阳学院学报(社会科学版)》2002,(Z1)
英语被动式在使用场合和主题意义上有一定的相似性 ,但在表达意义、应用范围及表达形式三个方面存在较大的差异。在翻译英语被动句时 ,不能一一对应地硬译为汉语被动句 ;而应根据具体情况 ,充分考虑英汉语特点 ,适当转换形式 ,使译文通顺达意 ,避免翻译腔 相似文献
109.
110.
英汉两种语言中表示主语和谓语之间的关系都要借助主动或被动这组语法形式和手段。但同一语法术语在这两种语言中所代表的内容不会完全相同。在英语中 ,有语态语法范畴 ,故有主动和被动语态之分 ,其被动语态的标记为be + -en ;而在汉语中因缺乏语态范畴 ,也就无所谓被动语态和主动语态之分。在动词谓语句中 ,如果主语是动作或行为的受事者 ,句子就是被动句。本文主要分析两种被动句的不同之处 ,以求从这一侧面来进行英汉对比。 相似文献