共查询到20条相似文献，搜索用时 62 毫秒
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立体几何涉及空间向量的考点主要包括空间向量的概念、运算、基本定理、空间向量坐标的概念以及坐标运算、空间向量的数量积、直线的方向向量、平面的法向量等.而影响学生得分的空间向量立体几何问题主要有4个,这4个典型问题是：空间向量的基本概念、向量的线性运算、空间向量的坐标表示及运算、空间向量的数量积.下面笔者以4种途径浅析此类问题的求解. 相似文献
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文章摘录“空间向量的数量积运算”这一课中一些重要的教学片段进行教学反思，主要包含理解空间向量投影与投影向量、定义并画出空间向量向向量的投影、利用投影证明空间向量数量积的分配律等. 相似文献
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高中新教材引入平面向量和空间向量,将其延伸到欧氏空间上的n维向量,向量的加、减、数乘运算都没有发生改变．若在欧式空间中规定一种涵盖平面向量和空间向量上的数量积的运算,则高中阶段的向量即为n=2,3时的情况． 相似文献
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立体几何在高中数学教材中分为立体几何初步（苏教版必修2）和空间向量与立体几何（苏教版选修2—1）两部分内容,立体几何初步主要内容为空间几何体和点、线、面之间的位置关系;空间向量与立体几何主要内容为空间向量的概念与运算以及用空间向量解决空间中的线面位置关系的判定与空间的计算问题． 相似文献
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张婷婷 《河北理科教学研究》2015,(2):12-14
空间向量为处理立体几何问题提供了许多新的解法,运用空间向量解决立体几何问题,有利于学生克服空间想象力的障碍和空间作图的困难,空间向量包括基向量和坐标向量.利用空间向量的坐标运算解立体几何问题,可把抽象的几何问题转化为代数计算问题,并具有很强的规律性和可操作性,而利用空间向量的坐标运算需先建立空间直角坐标系,但建立空间直角坐标系有时要受到图形的制约,在立体几何问题中很难普遍使用, 相似文献
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最新2017年考试大纲对空间向量在立体几何中的应用,具体要求如下:
空间向量及其运算(1)了解空间向量的概念,了解空间向量的基本定理及其意义,掌握空间向量的正交分解及其坐标表示;
(2)掌握空间向量的线性运算及其坐标表示;
(3)掌握空间向量的数量积及其坐标表示,能运用向量的数量积判断向量的共线与垂直. 相似文献
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立体几何在高中数学教材中分为“立体几何初步”（苏教版必修2）和“空间向量与立体几何”（苏教版选修2—1）两部分内容．“立体几何初步”主要内容为空间几何体和点、线、面之间的位置关系;“空间向量与立体几何”主要内容为空间向量的概念与运算以及用空间向量解决空间中的线面位置关系的判定与空间角的计算问题． 相似文献
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《中学生数理化(高中版)》2017,(10)
<正>空间向量的坐标运算是在空间直角坐标系的基础上研究空间向量关系的一大工具,通过空间几何关系与向量坐标关系的转化,对空间向量的坐标加以探究,感受应用空间向量解决数学问题的方法,理解转化思想和逻辑推理的数学方法。在坐标形式下,利用空间向量可以用来解决一些相关的立体几何问题。一、点的坐标问题例1已知O为坐标原点,A,B,C三点 相似文献
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马玉湖 《河北理科教学研究》2014,(2):14-15
正空间向量的数乘运算是空间向量的一种重要运算,掌握数乘运算的定义和运算律,特别是共线向量、共面向量的意义,理解共线向量和共面向量的定理及推论,并能用它们来证明空间向量的共线和共面问题.1空间向量的数乘运算例1如图1,在长方体ABCD- 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 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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唐芳 《读与写:教育教学刊》2008,5(6)
During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context. 相似文献