共查询到20条相似文献，搜索用时 66 毫秒
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化学是一门以实验为基础的学科，实验推动着化学的发展，实验在培养学生创新意识和创造能力方面有着独特的作用。但中学化学教材中的常规实验大多是验证性实验，已经沿用多年，虽有个别实验进行过调整和改进，但总体上仍未摆脱常规实验设计思想的束缚，以至于有的实验忽视了环境保护，有的实验成功率低，有的实验现象不明显。所以，化学实验改革迫在眉睫，而针对常规实验的不足，改进传统实验形式，创新实验设计，是目前化学实验改革的当务之急。 相似文献
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从2005年高考生物实验题的实际情况来看，教材知识点是实验题命题的基点，教材实验拓展是实验题取材的重点，借助实验方法创设新情境，侧重考查学生对实验进行探究和分析的能力成为命题趋向。其中设计型实验题与探索性实验更是热点，运用学过的知识、实验方法和步骤，突破已学实验的局限，自行设计新的实验方案，此类实验试题全面考查实验基本知识， 相似文献
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汪宗炎 《中小学实验与装备》1996,(6)
学生操作实验体会远安县茅坪场镇横店小学汪宗炎（４４４２００）学生操作实验，并不是放任学生胡乱实验。在实验的过程中，教师要进行指导，为学生提供实验材料，要求学生按规定的实验目的，自己设计方案，组装实验材料，观察实验现象，做好实验记录，分析实验结果。在整... 相似文献
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众所周知，物理学是一门以实验为基础的学科，实验在其中处于十分重要的位置。目前，高考理科综合测试的目标要求考生能掌握教学大纲中规定的实验，包括实验目的、实验原理和实验步骤，会控制实验条件和会使用实验仪器；会观察和分析实验现象，解释实验结果(数据)并得出实验结论；能够根据要求设计简单的实验方案。简而言之，理科综合测试对设计和完成实验的能力目标分为两条， 相似文献
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赵小丽 《中国教育科研与探索》2006,(1):80-80
教学中引导学生进行反思，对进一步理解实验、深化实验、完善实验起着重要的作用。通过反思可总结实验规律，优化实验方案，创新实验没计，揭示实验本质，增强实验效果。那么，物理实验之后应反思些什么呢？ 相似文献
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物理学是一门实验科学，一个合格的高中生应该具备良好的实验素质，而设计实验的能力是学生实验素质的综合反映，是学生的创造力、观察力、想象力以及应用知识解决问题能力的具体体现，根据实验目的和要求理解实验原理，正确选用仪器和器材，设计实验装置，编写正确的实验步骤，设计合理的实验表格以及对实验进行改进等都属于设计实验能力的范畴，为了有效地培养学生设计实验的能力，我认为应从以下三方面着手。 相似文献
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传统的以知识为中心的化学实验教学，实验往往是理论知识的“附属品”，无论是教师的演示实验还是学生实验，基本上都是验证性实验。学生在做实验时，只要按部就班地遵照课文中描述的实验步骤或是模仿教师的实验操作验证出已有的实验结论就算完成实验任务。他们既不会对实验现象提出质疑，也不敢对实验方案进行“异想天开”，以至于不少学生还养成了“做实验不如看实验，看实验不如背实验”的思维定势。 相似文献
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生物科学是一门实验科学，因此生物实验是生物学高考必考内容。从近几年的实验题在高考中的题型变化来看，借助实验方法创设新情境，侧重考查同学们对实验进行解释和分析的能力已成为命题趋向，其中设计型实验题更是热点。所谓实验设计，就是要求同学们分析实验原理，选择实验器材，安排实验步骤，设计实验数据的处理方法及分析实验现象。它包括设计实验方案、设计实验步骤、设计实验改进方法等。实验设计，主要考查考生是否理解实验原理，是否具有灵活运用实验知识的能力，是否具有在不同情境下迁移知识的能力。下面笔者对实验设计应遵循的原则作一阐述，并对近几年全国各地高考生物学实验设计题的部分试题作一解读，以期对2008年备考有所帮助。 相似文献
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在理综考试说明中，要求考生：(1)具有独立完成实验的能力。包括理解实验原理、实验目的及要求，了解实验用具，掌握实验方法步骤，会控制实验条件和使用实验仪器，会处理实验安全问题，会观察、分析和解释实验中产生的现象、数据，并得出合理的实验结论。(2)能根据要求灵活运用已学过的自然科学理论、实验方法和仪器，设计简单的实验方案并处理相关的实验问题。 相似文献
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
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Rachel Zupek 《海外英语》2007,(11):40-41
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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YANGShiguo 《重庆大学学报(英文版)》2004,3(1):86-88
The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex. 相似文献
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Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
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GUO Bao-feng Xiao Da-wei 《重庆大学学报(英文版)》2005,4(3):129-133
Using virtual reality for interactive design gives a designer an intuitive vision of a design and allows the designer to achieve a viable, optimal solution in a timely manner. The article discusses the process of making the Virtual Reality System of the Humble Administrator＇s Garden. Translating building data to the Virtual Reality Modeling Language （VRML） is by far unsatisfactory. This creates a challenge for computer designers to do optimization to meet requirements. Five different approaches to optimize models have been presented in this paper. The other methods are to optimize VRML and to reduce the file size. This is done by keeping polygon counts to a minimum and by applying such techniques as object culling and level-ofdetail switching. 相似文献
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The awareness of individualism can be traced back to the period of American Revolution when the Declaration of Independence was produced.It expressed basic beliefs concerning freedom,equality,democracy,privacy and the relationship between people and government,which were exactly what the philosophy of individualism mostly dealt with at that time.This paper is to exploit the essence of individualism by analyzing the Declaration .The analysis enables us to reconsider its significance to the issue of America human rights and foreign policies. 相似文献
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Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities. 相似文献