07年高考题分类汇总平面向量1.doc

1、last week, our economic work conference held today, held the county's rural areas for work and "five water treatment", "three to split" conference, which this year was a matter of "thirteen-five" important meeting of our county's economic and social development.

2、 the main task of the meeting was, on rural work and conscientiously implement the central, provincial and municipal "five water treatment", "three to split" series of important conferences, learn from the past, study deployment priority tasks this year. just now, the xxx deputy

3、head and deputy county magistrate, respectively, on the work of the xx was fully deployed, and put forward specific measures and requirements about is in place. county environmental protection bureau, the xx town, town of xx 3 units for a position statement, resounding, demonstrated determination an

4、d confidence. conference also recognition has advanced representative, this, i also representative county, and county government, to by recognition of advanced said warm of congratulated! to rural, and water and three modified a split front general cadres workers extend sincere of greeting! followin

5、g, i again told five points views: a, and deepening awareness, further enhanced work of sense and urgency since party of 18 session v plenary proposed has "innovation, and coordination, and green, and open, and shared" five big development concept hou, rural and environment governance work

6、 can said was upgrade to has more high of strategy level, is " thirteen-five "build well-off a top priority task. xx, county besides lingxi, longgang, jinxiang, the treasury, the hills, several industrial town outside the city centre, is basically belong to other rural areas, area, the vas

7、t rural population. same time, the current and coming period, is the county into a crucial period of the south gate of xx beautiful, environmental regulation directly affects the effectiveness of the strategic objectives can not be achieved. therefore, the focus on rural work and "five water tr

8、eatment", "three to split", the xx economic and social development has an important role. last year, through the joint efforts of the county, reform of the agricultural and rural development has made great progress in our county, environmental remediation and achieved initial results.

9、 "three agriculture" agricultural modernization level continues to increase, new 4-level modern agriculture park, released 20 agricultural leading enterprises above the county level, the county area of 200 acres of land more than eco-leisure, investments of more than 5 million yuan reached

10、 more than more than 100 agricultural projects. rural development has improved continuously, boutique line 1 completed the beautiful countryside, fine village 17, beautiful rural development conference was held in lingxi peach lake in the city. promote comprehensive rural reform, included in the pro

11、vince's building "three in one" system of farmers ' cooperative economic organization first promoting the county. improvement of farmers2007年高考数学试题汇编平面向量（北京4）已知是所在平面内一点，为边中点，且，那么（）（辽宁3）若向量与不共线，且，则向量与的夹角为（ d ）a0bcd（辽宁6）若函数的图象按向量平移后，得到函数的图象，则向量（ a ）abcd（宁夏，海南4）已知平面向量，则向量（）（福建4）对于向量和实

12、数，下列命题中真命题是（ b ）a若，则或b若，则或c若，则或d若，则（湖北2）将的图象按向量平移，则平移后所得图象的解析式为（）（湖北文9）设，在上的投影为，在轴上的投影为2，且，则为（ ）abcd（湖南4）设是非零向量，若函数的图象是一条直线，则必有（ a ）abcd（湖南文2）若是不共线的任意三点，则以下各式中成立的是（ b ）abcd（四川7）设aa,1，b2，b，c4,5，为坐标平面上三点，o为坐标原点，若上的投影相同，则a与b满足的关系式为 （ a ）(a) (b) (c) (d) （天津10）设两个向量和，其中为实数若，则的取值范围是（）-6，1 （-6，1-1，6（浙江7）若非

13、零向量满足，则（） （浙江文9）若非零向量、满足一，则（）(a) 2一2 (b) 2一2(c) 22一 (d) 22一（山东11）在直角中，是斜边上的高，则下列等式不成立的是（c）（a） （b） （c） （d） （山东文5）已知向量，若与垂直，则（ ）ab cd4（重庆5）在中，则（）dcab题（10）图（重庆10）如题（10）图，在四边形中，则的值为（）（上海14）直角坐标系中，分别是与轴正方向同向的单位向量在直角三角形中，若，则的可能值个数是（b） 1 2 3 4（全国3）已知向量，则与（a）a垂直b不垂直也不平行c平行且同向d平行且反向（全国5）在中，已知是边上一点，若，则（ a ）ab

14、cd二、填空题（安徽13）在四面体中，为的中点，为的中点，则 （用表示） （北京11）已知向量若向量，则实数的值是（北京12）在中，若，则（广东10. ）若向量、满足的夹角为120°，则 .（湖南12）在中，角所对的边分别为，若，b=，则 （湖南文12）在中，角所对的边分别为，若，则 （江西15）如图，在中，点是的中点，过点的直线分别交直线，于不同的两点，若，则的值为2（江西文13）在平面直角坐标系中，正方形的对角线的两端点分别为，则（陕西15. ）如图，平面内有三个向量、,其中与与的夹角为120°，与的夹角为30°,且|1，|，若+（，r）,则+的值为 .（天津

15、15）如图，在中，是边上一点，则（天津文15）在中，是边的中点，则（重庆文（13）在abc中，ab=1,bc=2,b=60°，则ac。（上海文6）若向量的夹角为，则 三、解答题：35（宁夏，海南）17（本小题满分12分）如图，测量河对岸的塔高时，可以选与塔底在同一水平面内的两个侧点与现测得，并在点测得塔顶的仰角为，求塔高解：在中，由正弦定理得所以在中，36（福建）17（本小题满分12分）在中，（）求角的大小；（）若最大边的边长为，求最小边的边长本小题主要考查两角和差公式，用同角三角函数关系等解斜三角形的基本知识以及推理和运算能力，满分12分解：（），又，（），边最大，即又，角最小，边

16、为最小边由且，得由得：所以，最小边37（广东）16.（本小题满分12分） 已知顶点的直角坐标分别为.（1）若，求sin的值;（2）若是钝角，求的取值范围. 解：(1) , 当c=5时， 进而(2)若a为钝角，则abac= -3(c-3)+( -4)2<0 解得c>显然此时有ab和ac不共线，故当a为钝角时，c的取值范围为，+)38（广东文）16(本小题满分14分) 已知abc三个顶点的直角坐标分别为a(3，4)、b(0，0)、c(，0) (1)若，求的值；(2)若，求sina的值解: (1) 由 得 (2) 39（浙江）（18）（本题14分）已知的周长为，且（i）求边的长；（ii）

17、若的面积为，求角的度数（18）解：（i）由题意及正弦定理，得，两式相减，得（ii）由的面积，得，由余弦定理，得，所以40（山东）20（本小题满分12分）如图,甲船以每小时海里的速度向正北方向航行,乙船按固定方向匀速直线航行,当甲船位于处时,乙船位于甲船的北偏西的方向处,此时两船相距20海里.当甲船航行20分钟到达处时,乙船航行到甲船的北偏西方向的处,此时两船相距海里,问乙船每小时航行多少海里?解：如图，连结，是等边三角形，在中，由余弦定理得，因此乙船的速度的大小为答：乙船每小时航行海里.41（山东文）17（本小题满分12分）在中，角的对边分别为（1）求；（2）若，且，求解：（1）又 解得，是锐

18、角（2）， ，又42（上海）17（本题满分14分） 在中，分别是三个内角的对边若，求的面积解： 由题意，得为锐角， ， 由正弦定理得 ， 43（全国文）（17）（本小题满分10分）设锐角三角形abc的内角a，b，c的对边分别为a，b，c，（）求b的大小；（）若，求b解：（）由，根据正弦定理得，所以，由为锐角三角形得（）根据余弦定理，得所以，44（全国）17（本小题满分10分）在中，已知内角，边设内角，周长为（1）求函数的解析式和定义域；（2）求的最大值解：（1）的内角和，由得应用正弦定理，知，因为，所以，（2）因为 ，所以，当，即时，取得最大值living standards, poor fa

19、rmers in less than complete elimination of 4600 yuan, 8949, 19008. "five waters rule": the county invested 2.169 billion yuan, similar counties line the city's first complete the 42 km of sewage pipe network construction, completion rate ranked first in the city, won the provincial rur

20、al sewage treatment work better; key pollution sources such as electroplating, papermaking, chemical industry management through verification and acceptance of the municipal government, the county removed black and odorous river, river waste, beginning of river ecological restoration effects. "

21、three modified a split" aspects: county total demolition illegal area up 2.759 million square meters, completed city issued annual task of 153%, split against area ranking city second; completed "three modified" area 4.846 million square meters, completed city issued annual task of 40

22、3%, ranking city third, which village in the a target completed total city ranking first; county government was named city level "three modified a split" work advanced. these achievements are hard won and should be appreciated. however, we are fully aware, the new period, and work in the c

23、ountryside and the environment facing higher standards and requirements, provincial party committee offered to high level build a comprehensive well-off society goal requires "no filth, dirty environment illegal buildings, into a well-off" municipal party committee also proposes to build i

24、nto the well-off benchmark goals of the city. compared with the superior claim, "south gate of xx beautiful" goal, my county "san nong" and environment there are a number of weaknesses and gaps, highlighted in the following five aspects: first, agriculture remained "low"

25、; pattern. "low" is reflected in the quality and low; short, value added of the industry chain is low; 123 fusion yield low employee age, low quality. "small" is reflected in smaller, specialized cooperatives throughout the county there were 3,396, but on the scale of too little. "san" is reflected in production, management, services, decentralized, centralized, standardized, brand, information and organizational level is not high. second, the countryside is still in "dirty" phase. "dirty&qu