共查询到20条相似文献，搜索用时 609 毫秒
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实验是中学化学教学中重要组成部分,占据着积极重要的地位。本文主要探究实验在中学化学教学中的基础地位,首先从总体上描述了当今中学化学教学现状,然后阐述了实验在中学化学教学中的基础地位,在此基础上,着重分析了处于基础地位的实验在中学化学教学中的重要作用。 相似文献
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化学演示实验是中学化学实验的重要组成部分。演示实验中存在的一些问题,严重影响了中学化学演示实验的效果。中学化学演示实验要做到＂四高二改一多＂,即成功率高、可见度高、探究度高、参与度高、改方式、改药品、实验机会多,才能切实提高中学化学演示实验的有效性。 相似文献
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本介绍了一组中学化学实验的改进方法，供有关的中学化学教师参考，旨在为中学化学实验提供简、快捷、直观的实验方法，更好地为中学化学教学服务。 相似文献
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本文从中学化学实验教学入手,分析了中学化学实验教学的重要性．同时,我们也必须清醒地认识到,中学化学实验对环境的污染问题已经引起了全社会的普遍关注．因此,在中学化学实验教学中,必须加强实验管理,努力改进和完善实验装置,通过化学实验教学,加强学生的环境保护意识． 相似文献
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从已有研究及其存在的问题出发,从实验本体和实验教学两个方面,针对已有问题,结合国外研究进展,分析了中学化学实验研究的诸多视角,拓展了中学化学实验研究的思路,提供了实验本体和实验教学创新设计的途径,为中学化学实验研究的提升奠定了理论基础. 相似文献
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文中阐述了绿色化学及化学实验绿色化的概念,中学化学实验绿色化的重要意义,重点探究了中学化学实验绿色化设计途径。我们可以通过选择无毒低毒实验药品,开展微型化学实验,利用原子经济反应,探索连续实验、倡导循环利用,借助计算机辅助与多媒体仿真实验等途径,实现中学化学实验绿色化。 相似文献
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杨妍 《中学化学教学参考》2020,(2):48-49
一、中学化学实验的重要性以实验为基础是中学化学教学的最基本特点,实验是一种教学实践活动。正确认识中学化学实验的地位,明确中学化学实验的教学功能,正确探究化学实验教学理论是在中学开展化学实验教学的前提和基础。 相似文献
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随着中学教育的不断改革,中学化学实验课程的构建也被大家广泛关注.化学新课程将实验放在一个十分重要的位置,是化学课程进行科学探究的主要方式,所以关于中学化学实验课程构建方案成为本文探讨的重点.在新的课程改革中,必须要合理安排中学化学实验课程,不断提高化学实验课程教学的质量,从而推动素质教育的发展.中学化学实验课程如何构建直接关系着中学生对化学知识的掌握和运用程度,是学生将理论知识与实践有效结合的最佳途径.本文将着重探讨中学化学实验课程构建理念、中学化学实验课程构建的现状以及中学化学实验课程的具体构建方案. 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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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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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
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RUZBEHANI Mohsen 《重庆大学学报(英文版)》2004,3(1):20-25
1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec… 相似文献
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Rajesh Kanoi 《海外英语》2007,(1):52
Today, Sunday morning, I sit thinking and typing at my computer. My thoughts are in my homeland, India and my body is in China. The body is here and mind there for a good reason. Mr. Hu is president and I am resident and both are in each other's countries (what a difference the absence of one small letter makes!). Mr. Hu will return in a few days and I will stay on longer. 相似文献
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正A One day a pig went to the stable(马棚)to see his good friend,an oldhorse,and was going to stay there forthenight.Night came and it was time forsleep.The pig went into the straw heap(稻草堆)and lay comfortably.A longtime passed,but the horse was stillstanding there and did not move.Thepig asked the horse why he did not go tosleep."Standing like this is the begin-ning ofsleeping,"answered the horse. 相似文献
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《今日中学生》2014,(9)
正1.Any fool can count the seeds in an apple.Only God can count all the apples in one seed.2.Happy families are all alike;every unhappy family is unhappy in its own way.3.Memories are the key not to the past,but to the future.4.Sometimes in the dark you see what you want to see.5.There is a great difference between 相似文献
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《重庆大学学报(英文版)》2014,(2)
正Scope and Policy The Journal of Chongqing University-English Edition(JCQU-E)is a peerreviewed journal publishing research articles in multiple disciplines of science and technology,covering civil and environmental engineering,chemical engineering,biotechnology,mechanical and electrical engineering,computer and data processing,mining,metallurgy,materials science,and interdisciplines thereof. 相似文献