共查询到20条相似文献，搜索用时 625 毫秒
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胡长春 《江西广播电视大学学报》2000,(1):62-64
微分中值定理的教学关键抓住两个要素，一是函数，二是区间，章从这里入手对Rolle定理、lagrange定理和Cauchy定理进行了较详尽的解释，并举例加以分析。通过例题和解释，我们对微分中值定理有一个较新的认识。 相似文献
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现代教育学原理与心理学研究认为，教学定理时，不宜由教师先提出定理的现成内容，而应该是有目的地提出一些供研究的素材，并作必要的启示或指引，让学生自己进行思考，通过实验、演算、推理或观察、分析、类比、归纳等步骤，自己探索规律、建立猜想、发现定理的结论．也就是通过设置问题情境，引导学生归纳、猜想、自我发现定理，从而提高学生的创造力，培养他们的创新精神。 那么，在定理教学中，怎样开展学生自我发现教学呢？下面，笔者根据多年来的教学实践，谈谈自己的浅陋做法与体会。１通过实验发现定理 教师通过组织学生做与定理相… 相似文献
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根据数学教学实践，从微分中值定理的条件及宽松的应用环境，定理的实用性，定理证明方法的数学思想三个方面探讨了微分中值定理的教学功能，提出了做好微分中值定理授课应注意的环节和方法． 相似文献
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塞瓦定理与梅涅劳斯定理是数学竞赛范围内的两个重要定理．近几年来，使用这两个定理证明的试题频频出现，因而，不会运用这两个定理证题的人是很难取得好成绩的． 相似文献
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一、课题 圆幂定理 二、目的要求引导学生用统一、变化的观点理解和掌握圆的相交弦定理和切割线定理及其推论，并在“发现”圆幂定理的过程中培养学生的创造能力． 相似文献
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定理教学是数学教学的重要组成部分. 它既是概念教学的延续,又是解题教学的基础,起着承上启下的作用,直接影响着数学教学质量的提高. 下面,结合矩形性质定理谈谈数学定理的教学应如何进行. 相似文献
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刘旺 《赤峰学院学报(自然科学版)》2005,21(2):82-82,88
“三垂线定理”是立体几何中的重要定理，其涉及的概念较多，是教学中的难点．对其教学应引导学生发现矛盾，观察实验，亲自动手，揭示实质，从而在发现问题和解决问题的过程中使学生更好地掌握知识，培养能力， 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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罗艳萍 《读与写:教育教学刊》2008,5(6)
The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity. 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