新高考数学二轮复习 题型归纳演练专题5-1 平面向量中的高频小题归类原卷版_第1页
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专题5-1平面向量中的高频小题归类目录TOC\o"1-1"\h\u专题5-1平面向量中的高频小题归类 1 1题型一:平面向量的线性运算 1题型二:向量数量积问题(含最值,范围问题) 4题型三:向量的夹角 7题型四:向量模(含最值,范围问题) 8题型五:平面向量的平行与垂直问题 10题型六:三点共线的等价关系 11 14一、单选题 14二、多选题 16三、填空题 16四、双空题 16题型一:平面向量的线性运算【典例分析】例题1.(2022·河南开封·一模(文))已知SKIPIF1<0中,SKIPIF1<0为SKIPIF1<0边上一点,且SKIPIF1<0,则SKIPIF1<0(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0例题2.(2022·河南新乡·一模(理))在△SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0分别为边SKIPIF1<0,SKIPIF1<0的中点,且SKIPIF1<0与SKIPIF1<0交于点SKIPIF1<0,记SKIPIF1<0,SKIPIF1<0,则SKIPIF1<0(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0例题3.(2022·四川资阳·一模(理))如图,SKIPIF1<0,SKIPIF1<0为以SKIPIF1<0的直径的半圆的两个三等分点,SKIPIF1<0为线段SKIPIF1<0的中点,SKIPIF1<0为SKIPIF1<0的中点,设SKIPIF1<0,SKIPIF1<0,则SKIPIF1<0(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0【提分秘籍】平面向量的线性运算主要工具是向量的加,减法:向量加法法则:①三角形法则(首尾相接,首尾连):SKIPIF1<0.②平行四边形法则(作平移,共起点,四边形,对角线):SKIPIF1<0向量减法法则:(共起点,连终点,指向被减向量)SKIPIF1<0【变式演练】1.(2022·河北容城中学模拟预测)在平行四边形SKIPIF1<0中,SKIPIF1<0分别是SKIPIF1<0的中点,SKIPIF1<0,SKIPIF1<0,则SKIPIF1<0(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<02.(2022·吉林市教育学院模拟预测(理))如图,SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0,点E是SKIPIF1<0的三等分点SKIPIF1<0,则SKIPIF1<0(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<03.(2022·宁夏·石嘴山市第三中学模拟预测(理))在等边SKIPIF1<0中,O为重心,D是SKIPIF1<0的中点,则SKIPIF1<0(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<04.(2022·全国·模拟预测(理))在SKIPIF1<0中,D为AC的中点,SKIPIF1<0,则SKIPIF1<0(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0题型二:向量数量积问题(含最值,范围问题)【典例分析】例题1.(2022·湖南·模拟预测)已知直线SKIPIF1<0与圆SKIPIF1<0:SKIPIF1<0相交于不同两点SKIPIF1<0,SKIPIF1<0,点SKIPIF1<0为线段SKIPIF1<0的中点,若平面上一动点SKIPIF1<0满足SKIPIF1<0,则SKIPIF1<0的取值范围是(

)A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<0例题2.(2022·全国·模拟预测)如图,在矩形SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0为边SKIPIF1<0上的任意一点(包含端点),SKIPIF1<0为SKIPIF1<0的中点,则SKIPIF1<0的取值范围是(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0例题3.(2022·江西·模拟预测(理))已知圆SKIPIF1<0的半径为2,点SKIPIF1<0满足SKIPIF1<0,SKIPIF1<0,SKIPIF1<0分别是SKIPIF1<0上两个动点,且SKIPIF1<0,则SKIPIF1<0的取值范围是(

)A.[6,24] B.[4,22] C.[6,22] D.[4,24]例题4.(2022·上海松江·二模)已知正方形SKIPIF1<0的边长为4,点SKIPIF1<0、SKIPIF1<0分别在边SKIPIF1<0、SKIPIF1<0上,且SKIPIF1<0,SKIPIF1<0,若点SKIPIF1<0在正方形SKIPIF1<0的边上,则SKIPIF1<0的取值范围是(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0例题5.(2022·黑龙江·哈尔滨三中模拟预测(理))已知抛物线SKIPIF1<0:SKIPIF1<0,点SKIPIF1<0为直线SKIPIF1<0上一动点,过点SKIPIF1<0作直线SKIPIF1<0,SKIPIF1<0与抛物线SKIPIF1<0分别切于点SKIPIF1<0,SKIPIF1<0,则SKIPIF1<0(

)A.0 B.1 C.-1 D.0或1【提分秘籍】求两个向量的数量积有三种方法:(1)利用定义(包括向量数量积几何意义)(2)利用向量的坐标运算(自主建系,只要题目有可以建系的条件,可通过建系法求解);(3)利用向量三角不等式SKIPIF1<0(同号同向取等号;异号反向取等号)例如:SKIPIF1<0中间的连接号都是“SKIPIF1<0”,记忆口诀:同号则SKIPIF1<0,SKIPIF1<0同向不等式SKIPIF1<0取到等号;在不等式SKIPIF1<0中,中间的连接号“SKIPIF1<0”和“SKIPIF1<0”,记忆口诀:异号则SKIPIF1<0,SKIPIF1<0反向不等式SKIPIF1<0取到等号;【变式演练】1.(2022·四川·射洪中学模拟预测(理))在SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0为线段SKIPIF1<0的中点,SKIPIF1<0,SKIPIF1<0为线段SKIPIF1<0垂直平分线SKIPIF1<0上任一异于SKIPIF1<0的点,则SKIPIF1<0(

)A.SKIPIF1<0 B.4 C.7 D.SKIPIF1<02.(2022·全国·模拟预测)如图,在平行四边形SKIPIF1<0中,SKIPIF1<0,点E是SKIPIF1<0的中点,点F满足SKIPIF1<0,且SKIPIF1<0,则SKIPIF1<0(

)A.9 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<03.(2022·北京·人大附中模拟预测)窗花是贴在窗纸或窗户玻璃上的剪纸,是中国古老的传统民间艺术.图1是一张由卷曲纹和回纹构成的正六边形前纸窗花.图2中正六边形SKIPIF1<0的边长为4,圆SKIPIF1<0的圆心为该正六边形的中心,圆SKIPIF1<0的半径为2,圆SKIPIF1<0的直径SKIPIF1<0,点SKIPIF1<0在正六边形的边上运动,则SKIPIF1<0的最小值为(

)A.5 B.6 C.7 D.84.(2022·全国·模拟预测)在SKIPIF1<0中,已知SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,点SKIPIF1<0在边SKIPIF1<0上,则SKIPIF1<0的最大值为(

)A.3 B.2 C.SKIPIF1<0 D.SKIPIF1<05.(2022·四川·成都七中一模(文))已知SKIPIF1<0,SKIPIF1<0,且SKIPIF1<0,则SKIPIF1<0的最小值是_____________.6.(2022·上海崇明·一模)在边长为2的正六边形ABCDEF中,点P为其内部或边界上一点,则SKIPIF1<0的取值范围为______.7.(2022·安徽·全椒县第八中学模拟预测(理))骑自行车是一种环保又健康的运动,如图是某一自行车的平面结构示意图,已知图中的圆SKIPIF1<0(前轮),圆SKIPIF1<0(后轮)的半径均为SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0均是边长为SKIPIF1<0的等边三角形.设点SKIPIF1<0为后轮上的一点,则在骑行该自行车的过程中,SKIPIF1<0的最大值为______.题型三:向量的夹角【典例分析】例题1.(2022·广西北海·一模(文))已知向量SKIPIF1<0是单位向量,向量SKIPIF1<0,且SKIPIF1<0,则SKIPIF1<0与SKIPIF1<0的夹角为(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0例题2.(2022·云南大理·模拟预测)已知向量SKIPIF1<0满足SKIPIF1<0,则向量SKIPIF1<0与SKIPIF1<0所成的夹角为(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0例题3.(2022·浙江·模拟预测)已知平面向量SKIPIF1<0满足:SKIPIF1<0,若对满足条件的任意向量SKIPIF1<0,SKIPIF1<0恒成立,则SKIPIF1<0的最小值是______________.【提分秘籍】求向量夹角公式:SKIPIF1<0【变式演练】1.(2022·全国·模拟预测(理))已知平面向量SKIPIF1<0与SKIPIF1<0互相垂直,模长之比为2:1,若SKIPIF1<0,则SKIPIF1<0与SKIPIF1<0的夹角的余弦值为(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<02.(2022·山东德州·模拟预测)已知SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,则SKIPIF1<0(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<03.(2022·湖南·模拟预测)已知向量SKIPIF1<0,SKIPIF1<0满足SKIPIF1<0,SKIPIF1<0,则SKIPIF1<0与SKIPIF1<0的夹角的最大值为(

)A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<04.(2022·广西北海·一模(理))已知向量SKIPIF1<0是单位向量,向量SKIPIF1<0,且SKIPIF1<0,则SKIPIF1<0与SKIPIF1<0的夹角为_____________.题型四:向量模(含最值,范围问题)【典例分析】例题1.(2022·浙江绍兴·一模)已知向量SKIPIF1<0,SKIPIF1<0满足SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,则SKIPIF1<0(

)A.2 B.SKIPIF1<0 C.1 D.SKIPIF1<0例题2.(2022·山东·德州市教育科学研究院三模)已知平面向量SKIPIF1<0,SKIPIF1<0,且非零向量SKIPIF1<0满足SKIPIF1<0,则SKIPIF1<0的最大值是(

)A.1 B.SKIPIF1<0 C.SKIPIF1<0 D.2例题3.(2022·四川资阳·一模(理))已知平面向量SKIPIF1<0,SKIPIF1<0,SKIPIF1<0满足SKIPIF1<0,且SKIPIF1<0,则SKIPIF1<0的最大值为______.例题4.(2022·浙江绍兴·一模)已知圆SKIPIF1<0:SKIPIF1<0,线段SKIPIF1<0在直线SKIPIF1<0:SKIPIF1<0上运动,点SKIPIF1<0为线段SKIPIF1<0上任意一点,若圆SKIPIF1<0上存在两点SKIPIF1<0,SKIPIF1<0,使得SKIPIF1<0,则线段SKIPIF1<0长度的最大值是______.例题5.(2022·江西南昌·模拟预测(文))已知SKIPIF1<0为正交基底,且SKIPIF1<0,SKIPIF1<0分别为SKIPIF1<0的中点,若SKIPIF1<0,则SKIPIF1<0的最小值为_____.【提分秘籍】求两个向量的模方法:(1)SKIPIF1<0可通过基底法表示向量求模,也可通过建系法用坐标表示向量求模(2)利用向量三角不等式SKIPIF1<0(同号同向取等号;异号反向取等号)例如:SKIPIF1<0中间的连接号都是“SKIPIF1<0”,记忆口诀:同号则SKIPIF1<0,SKIPIF1<0同向不等式SKIPIF1<0取到等号;在不等式SKIPIF1<0中,中间的连接号“SKIPIF1<0”和“SKIPIF1<0”,记忆口诀:异号则SKIPIF1<0,SKIPIF1<0反向不等式SKIPIF1<0取到等号;【变式演练】1.(2022·全国·大化瑶族自治县高级中学模拟预测(文))已知点A、B在单位圆上,SKIPIF1<0,若SKIPIF1<0,则SKIPIF1<0的最小值是(

)A.2 B.3 C.SKIPIF1<0 D.42.(2022·河南·平顶山市第一高级中学模拟预测(文))已知A,B为圆SKIPIF1<0上的两动点,SKIPIF1<0,点P是圆SKIPIF1<0上的一点,则SKIPIF1<0的最小值是(

)A.2 B.4 C.6 D.83.(2022·浙江·乐清市知临中学模拟预测)平面向量SKIPIF1<0满足SKIPIF1<0,则SKIPIF1<0与SKIPIF1<0夹角最大值时SKIPIF1<0为(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<04.(2022·海南华侨中学模拟预测)已知不共线的平面向量SKIPIF1<0两两所成的角相等,且SKIPIF1<0,则SKIPIF1<0(

)A.SKIPIF1<0 B.2 C.3 D.2或35.(2022·浙江·三门县观澜中学模拟预测)已知SKIPIF1<0为单位向量,SKIPIF1<0满足SKIPIF1<0,当SKIPIF1<0与SKIPIF1<0的夹角最大时,SKIPIF1<0_________.题型五:平面向量的平行与垂直问题【典例分析】例题1.(2022·黑龙江·哈尔滨三中模拟预测)已知向量SKIPIF1<0SKIPIF1<0,SKIPIF1<0SKIPIF1<0,若SKIPIF1<0,则SKIPIF1<0(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0例题2.(2022·江苏·扬州中学模拟预测)已知向量SKIPIF1<0,SKIPIF1<0,若SKIPIF1<0,则SKIPIF1<0(

)A.SKIPIF1<0 B.2 C.8 D.SKIPIF1<0例题3.(2022·四川省绵阳八一中学模拟预测(理))已知向量SKIPIF1<0,且SKIPIF1<0,则SKIPIF1<0___________.例题4.(2022·陕西渭南·一模(文))已知点SKIPIF1<0,SKIPIF1<0,向量SKIPIF1<0,若SKIPIF1<0,则实数SKIPIF1<0等于___________.【提分秘籍】两个向量平行、垂直的坐标表示已知非零向量SKIPIF1<0,(1)SKIPIF1<0.(2)SKIPIF1<0【变式演练】1.(2022·贵州贵阳·模拟预测(文))已知平面向量SKIPIF1<0,若SKIPIF1<0与SKIPIF1<0垂直,则SKIPIF1<0(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<02.(2022·江苏·南京市江宁高级中学模拟预测)若SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,则SKIPIF1<0的值为(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<03.(2022·四川绵阳·一模(理))已知向量SKIPIF1<0,SKIPIF1<0,且SKIPIF1<0,则SKIPIF1<0______.4.(2022·广东茂名·二模)已知向量SKIPIF1<0(t,2t),SKIPIF1<0=(﹣t,1),若(SKIPIF1<0﹣SKIPIF1<0)⊥(SKIPIF1<0+SKIPIF1<0),则t=_____.题型六:三点共线的等价关系【典例分析】例题1.(2022·陕西·汉阴县第二高级中学一模(理))已知SKIPIF1<0是SKIPIF1<0内一点,SKIPIF1<0,若SKIPIF1<0与SKIPIF1<0的面积之比为SKIPIF1<0,则实数SKIPIF1<0的值为(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0例题2.(2022·河南·南阳中学模拟预测(文))SKIPIF1<0中,若SKIPIF1<0,点SKIPIF1<0满足SKIPIF1<0,直线SKIPIF1<0与直线SKIPIF1<0相交于点SKIPIF1<0,则SKIPIF1<0的长(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0例题3.(2022·吉林·东北师大附中模拟预测)在SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0分别是边SKIPIF1<0,SKIPIF1<0上的点,且SKIPIF1<0,SKIPIF1<0,点SKIPIF1<0是线段SKIPIF1<0上异于端点的一点,且满足SKIPIF1<0,则SKIPIF1<0_________.例题4.(2022·湖南·雅礼中学一模)在SKIPIF1<0中,SKIPIF1<0SKIPIF1<0在边SKIPIF1<0上,延长SKIPIF1<0到SKIPIF1<0,使得SKIPIF1<0,若SKIPIF1<0(SKIPIF1<0为常数),则SKIPIF1<0的长度是________.【提分秘籍】设平面上三点SKIPIF1<0,SKIPIF1<0,SKIPIF1<0不共线,则平面上任意一点SKIPIF1<0与SKIPIF1<0,SKIPIF1<0共线的充要条件是存在实数SKIPIF1<0与SKIPIF1<0,使得SKIPIF1<0,且SKIPIF1<0.特别地,当SKIPIF1<0为线段SKIPIF1<0的中点时,SKIPIF1<0.【变式演练】1.(2022·山东烟台·三模)如图,边长为2的等边三角形的外接圆为圆SKIPIF1<0,SKIPIF1<0为圆SKIPIF1<0上任一点,若SKIPIF1<0,则SKIPIF1<0的最大值为(

)A.SKIPIF1<0 B.2 C.SKIPIF1<0 D.12.(2022·安徽·合肥市第六中学模拟预测(理))如图,在SKIPIF1<0中,M,N分别是线段SKIPIF1<0,SKIPIF1<0上的点,且SKIPIF1<0,SKIPIF1<0,D,E是线段SKIPIF1<0上的两个动点,且SKIPIF1<0,则SKIPIF1<0的的最小值是(

)A.4 B.SKIPIF1<0 C.SKIPIF1<0 D.23.(2022·山东滨州·二模)在SKIPIF1<0中,M为BC边上任意一点,N为线段AM上任意一点,若SKIPIF1<0(SKIPIF1<0,SKIPIF1<0),则SKIPIF1<0的取值范围是(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<04.(2022·河南·安阳一中模拟预测(文))在SKIPIF1<0中,点D在BC上,且满足SKIPIF1<0,点E为AD上任意一点,若实数x,y满足SKIPIF1<0,则SKIPIF1<0的最小值为(

)A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<05.(2022·上海市实验学校模拟预测)已知点SKIPIF1<0为SKIPIF1<0的重心,过SKIPIF1<0作直线与SKIPIF1<0、SKIPIF1<0两边分别交于SKIPIF1<0、SKIPIF1<0两点,且SKIPIF1<0,SKIPIF1<0,则SKIPIF1<0的值为________.一、单选题1.(2022·贵州·贵阳六中一模(理))在平行四边形SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0,则SKIPIF1<0(

)A.1 B.-1 C.9 D.-92.(2022·上海普陀·一模)设SKIPIF1<0,若向量SKIPIF1<0、SKIPIF1<0、SKIPIF1<0满足SKIPIF1<0,且SKIPIF1<0,则满足条件的k的取值可以是(

)A.1 B.2 C.3 D.43.(2022·河南·民权县第一高级中学模拟预测(文))已知在平行四边形SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,则SKIPIF1<0(

)A.6 B.4 C.3 D.24.(2022·全国·模拟预测)已知向量SKIPIF1<0,SKIPIF1<0满足SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,则SKIPIF1<0(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<05.(2022·云南·昆明一中模拟预测(理))设D为SKIPIF1<0所在平面内一点,SKIPIF1<0,若SKIPIF1<0,则SKIPIF1<0(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<06.(2022·全国·模拟预测)如图,在SKIPIF1<0中,点D是边AB上一点且SKIPIF1<0,E是边BC的中点,直线AE和直线CD交于点F,若BF是SKIPIF1<0的平分线,则SKIPIF1<0(

)A.4 B.3 C.2 D.SKIPIF1<07.(2022·全国·模拟预测)如图,在平行四边形SKIPIF1<0中,点SKIPIF1<0在线段SKIPIF1<0上,且SKIPIF1<0(SKIPIF1<0),若SKIPIF1<0(SKIPIF1<0,SKIPIF1<0)且SKIPIF1<0,则SKIPIF1<0(

)A.SKIPIF1<0 B.3 C.SKIPIF1<0 D.48.(2022·江苏盐城·模拟预测)在SKIPIF1<0中,过重心E任作一直线分别交AB,AC于M,N两点,设SKIPIF1<0,SKIPIF1<0,(SKIPIF1<0,SKIPIF1<0),则SKIPIF1<0的最小值是(

)A.SKIPIF1<0 B.SKIPIF1<0 C.3 D.29.(2022·广西·南宁市第十九中学模拟预测(文))SKIPIF1<0的外心SKIPIF1<0满足SKIPIF1<0,SKIPIF1<0,则SKIPIF1<0的面积为(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.210.(2022·河南·一模(理))在SKIPIF1<0中,SKIPIF1<0,点SKIPIF1<0在线段SKIPIF1<0上且与端点不重合,若SKIPIF1<0,则SKIPIF1<0的最大值为(

).A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0二、多选题11.(2022·全国·模拟预测)已知过抛物线SKIPIF1<0:SKIPIF1<0的焦点SKIPIF1<0的直线SKIPIF1<0:SKIPIF1<0与抛物线SKIPIF1<0交于SKIPIF1<0

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