您好,欢迎访问三七文档
当前位置:首页 > 中学教育 > 初中教育 > 2009年山西省中考数学试题及答案
2009年山西省初中毕业学业考试试卷数学一、填空题(每小题2分,共20分)1.比较大小:23(填“>”、“=”或“<“).2.山西有着丰富的旅游资源,如五台山、平遥古城、乔家大院等著名景点,吸引了众多的海内外游客,2008年全省旅游总收入739.3亿元,这个数据用科学记数法可表示为.3.请你写出一个有一根为1的一元二次方程:.4.计算:123=.5.如图所示,A、B、C、D是圆上的点,17040A°,°,则C度.6.李师傅随机抽查了本单位今年四月份里6天的日用水量(单位:吨)结果如下:7,8,8,7,6,6,根据这些数据,估计四月份本单位用水总量为吨.7.如图,ABC△与ABC△是位似图形,且顶点都在格点上,则位似中心的坐标是.8.如图,ABCD的对角线AC、BD相交于点O,点E是CD的中点,ABD△的周长为16cm,则DOE△的周长是cm.9.若反比例函数的表达式为3yx,则当1x时,y的取值范围是.10.下列图案是晋商大院窗格的一部分,其中“○”代表窗纸上所贴的剪纸,则第n个图中所贴剪纸“○”的个数为.ABCD1(第5题)ACDBEO(第8题)yxOABCABC1234567891011121234567891011(第7题)(1)(2)(3)…………(第10题)二、选择题(在下列各小题中,均给出四个备选答案,其中只有一个正确答案,请将正确答案的字母号填入下表相应的空格内,每小题3分,共24分)11.下列计算正确的是()A.623aaaB.122C.236326xxx·D.0π3112.反比例函数kyx的图象经过点23,,那么k的值是()A.32B.23C.6D.613.不等式组21318xx≥的解集在数轴上可表示为()A.B.C.D.14.解分式方程11222xxx,可知方程()A.解为2xB.解为4xC.解为3xD.无解15.如图是由几个相同的小正方体搭成的几何体的三视图,则搭成这个几何体的小正方体的个数是()A.5B.6C.7D.816.如图,AB是O⊙的直径,AD是O⊙的切线,点C在O⊙上,BCOD∥,23ABOD,,则BC的长为()A.23B.32C.32D.2217.如图(1),把一个长为m、宽为n的长方形(mn)沿虚线剪开,拼接成图(2),成为在一角去掉一个小正方形后的一个大正方形,则去掉的小正方形的边长为()A.2mnB.mnC.2mD.2n01234012340123401234主视图左视图俯视图俯视图(第15题)AABBCCDO(第16题)mnnn(2)(1)(第17题)18.如图,在RtABC△中,90ACB°,3BC,4AC,AB的垂直平分线DE交BC的延长线于点E,则CE的长为()A.32B.76C.256D.2三、解答题(本题共76分)19.(每小题4分,共12分)(1)计算:2312xxx(2)化简:222242xxxx(3)解方程:2230xx20.(本题6分)已知每个网格中小正方形的边长都是1,图1中的阴影图案是由三段以格点为圆心,半径分别为1和2的圆弧围成.(1)填空:图1中阴影部分的面积是(结果保留π);(2)请你在图2中以图1为基本图案,借助轴对称、平移或旋转设计一个完整的花边图案(要求至少含有两种图形变换).21.(本题8分)根据山西省统计信息网公布的数据,绘制了山西省2004~2008固定电话和移动电话年末用户条形统计图如下:(1)填空:2004~2008移动电话年末用户的极差是万户,固定电话年末用户的中位数是万户;(2)你还能从图中获取哪些信息?请写出两条.ADBEC(第18题)(第20题图1)(第20题图2)020040060080010001200140016001800年份万户固定电话年末用户移动电话年末用户20042005200620072008721.3753.8897.8906.2885.4989.6859.01420.41689.5803.0(第21题)22.(本题8分)某商场为了吸引顾客,设计了一种促销活动:在一个不透明的箱子里放有4个相同的小球,球上分别标有“0元”、“10元”、“20元”和“30元”的字样.规定:顾客在本商场同一日内,每消费满200元,就可以在箱子里先后摸出两个球(第一次摸出后不放回).商场根据两小球所标金额的和返还相应价格的购物券,可以重新在本商场消费.某顾客刚好消费200元.(1)该顾客至少可得到元购物券,至多可得到元购物券;(2)请你用画树状图或列表的方法,求出该顾客所获得购物券的金额不低于30元的概率.23.(本题8分)有一水库大坝的横截面是梯形ABCD,ADBCEF∥,为水库的水面,点E在DC上,某课题小组在老师的带领下想测量水的深度,他们测得背水坡AB的长为12米,迎水坡上DE的长为2米,135120BADADC°,°,求水深.(精确到0.1米,21.411.73,3)24.(本题8分)某批发市场批发甲、乙两种水果,根据以往经验和市场行情,预计夏季某一段时间内,甲种水果的销售利润y甲(万元)与进货量x(吨)近似满足函数关系0.3yx甲;乙种水果的销售利润y乙(万元)与进货量x(吨)近似满足函数关系2yaxbx乙(其中0aab,,为常数),且进货量x为1吨时,销售利润y乙为1.4万元;进货量x为2吨时,销售利润y乙为2.6万元.(1)求y乙(万元)与x(吨)之间的函数关系式.(2)如果市场准备进甲、乙两种水果共10吨,设乙种水果的进货量为t吨,请你写出这两种水果所获得的销售利润之和W(万元)与t(吨)之间的函数关系式.并求出这两种水果各进多少吨时获得的销售利润之和最大,最大利润是多少?(第23题)ABCDEF水深25.(本题12分)在ABC△中,2120ABBCABC,°,将ABC△绕点B顺时针旋转角(0°90)°得ABCAB111△,交AC于点E,11AC分别交ACBC、于DF、两点.(1)如图1,观察并猜想,在旋转过程中,线段1EA与FC有怎样的数量关系?并证明你的结论;(2)如图2,当30°时,试判断四边形1BCDA的形状,并说明理由;(3)在(2)的情况下,求ED的长.26.(本题14分)如图,已知直线128:33lyx与直线2:216lyx相交于点Cll12,、分别交x轴于AB、两点.矩形DEFG的顶点DE、分别在直线12ll、上,顶点FG、都在x轴上,且点G与点B重合.(1)求ABC△的面积;(2)求矩形DEFG的边DE与EF的长;(3)若矩形DEFG从原点出发,沿x轴的反方向以每秒1个单位长度的速度平移,设移动时间为(012)tt≤≤秒,矩形DEFG与ABC△重叠部分的面积为S,求S关于t的函数关系式,并写出相应的t的取值范围.ADBECF1A1CADBECF1A1C(第25题图1)(第25题图2)ADBEOCFxyy1ly2l(G)(第26题)2009年山西省初中毕业学业考试试卷数学一、填空题(每小题2分,共20分)1.>2.107.393103.答案不唯一,如21x4.35.306.2107.(9,0)8.89.30y10.32n二、选择题(在下列各小题中,均给出四个备选答案,其中只有一个正确答案,请将正确答案的字母号填入下表相应的空格内,每小题3分,共24分)题号1112131415161718答案DCDDBAAB三、解答题(本题共76分)19.(1)解:原式=226932xxxx··························································(2分)=226932xxxx·····························································(3分)=97x.··················································································(4分)(2)解:原式=22222xxxxx·································································(2分)=222xxx·············································································(3分)=1.···························································································(4分)(3)解:移项,得223xx,配方,得214x,·············································(2分)∴12x,∴1213xx,.····························································(4分)(注:此题还可用公式法,分解因式法求解,请参照给分)20.解:(1)π2;···························································································(2分)(2)答案不唯一,以下提供三种图案.(注:如果花边图案中四个图案均与基本图案相同,则本小题只给2分;未画满四个“田”字格的,每缺1个扣1分.)21.(1)935.7,859.0;························································································(4分)(2)解:①2004~2008移动电话年末用户逐年递增.②2008年末固定电话用户达803.0万户.···············································(8分)(第20题图2)···································(6分)(注:答案不唯一,只要符合数据特征即可得分)22.解:(1)10,50;·························································································(2分)(2)解:解法一(树状图):··················································································································(6分)从上图可以看出,共有12种可能结果,其中大于或等于30元共有8种可能结果,因此P(不低于30元)=82123.······························································(8分)解法二(列表法):第一次第二次01020300102030101030402020305030304050···········································································································(6分)(以下过程同“解法一”)·········································································(8分)23.解:分别过AD、作AMBC于MDGBC,于G.过E作EHDG于H,则四边
本文标题:2009年山西省中考数学试题及答案
链接地址:https://www.777doc.com/doc-11110955 .html