中考资源网中考资源网期待您的投稿!zkzyw@163.com-1-2009年柳州市初中毕业升学考试试卷数学(考试时间共120分钟,全卷满分120分)第Ⅰ卷(选择题,共18分)注意事项:1.答题前,考生务必先将自己的姓名、准考证号用蓝、黑色墨水笔或圆珠笔填写在试卷左边的密封线内.2.第Ⅰ卷为第1页至第二页.答题时,请用2B铅笔把各小题正确答案序号填涂在答题卡对应的题号内.如需改动,须用橡皮擦干净后,再填涂其它答案.在第Ι卷上答题无效.一、选择题(本大题共6小题,每小题3分,满分18分.在每个小题给出的四个选项中,只有一项是正确的,每小题选对得3分,选错、不选或多选均得零分)1.在3,0,2,2四个数中,最小的数是()A.3B.0C.2D.22.如图1所示,图中三角形的个数共有()A.1个B.2个C.3个D.4个3.若ba,则下列各式中一定成立的是()A.11baB.33baC.baD.bcac4.某学习小组7个男同学的身高(单位:米)为:1.66、1.65、1.72、1.58、1.64、1.66、1.70,那么这组数据的众数为()A.1.65B.1.66C.1.67D.1.705.分式方程3221xx的解是()A.0xB.1xC.2xD.3x6.一根笔直的小木棒(记为线段AB),它的正投影为线段CD,则下列各式中一定成立的是()A.AB=CDB.AB≤CDC.CDABD.AB≥CDCDBA图1中考资源网中考资源网期待您的投稿!zkzyw@163.com-2-2009年柳州市初中毕业升学考试试卷数学注意事项:1.答题前,考生务必先将自己的姓名、准考证号用蓝、黑色墨水笔或圆珠笔填写在试卷左边的密封线内.2.第Ⅱ卷从第3页至第10页.答题时,用蓝、黑色墨水笔或圆珠笔直接将答案写在试卷上.第Ⅱ卷(非选择题,满分102分)二、填空题(本大题共10小题,每小题3分,满分30分.请将答案直接填写在题中横线上的空白处)7.计算:2)5(0=.8.请写出一个是轴对称图形的图形名称.答:.9.计算:312=.10.在图2中,直线AB∥CD,直线EF与AB、CD分别相交于点E、F,如果∠1=46°,那么∠2=°.11.一个物体现在的速度是5米/秒,其速度每秒增加2米/秒,则再过秒它的速度为15米/秒.12.因式分解:22xx=.13.反比例函数xmy1的图象经过点(2,1),则m的值是.14.在一个不透明的口袋中装有若干个只有颜色不同的球,如果已知袋中只有4个红球,且摸出红球的概率为31,那么袋中的球共有个.15.如图3,30MAB,P为AB上的点,且6AP,圆P与AM相切,则圆P的半径为.16.矩形内有一点P到各边的距离分别为1、3、5、7,则该矩形的最大面积为平方单位.得分评卷员图3BAMPFEDCBA21图2中考资源网中考资源网期待您的投稿!zkzyw@163.com-3-三、解答题(本大题10小题,满分72分.解答应写出必要的文字说明、演算步骤或推理过程)17.(本题满分6分)先化简,再求值:)5()1(3xx,其中2x.18.(本题满分6分)解不等式组②392①31xx,并把它的解集表示在数轴上.19.(本题满分6分)某学习小组对所在城区初中学生的视力情况进行抽样调查,图4是这些同学根据调查结果画出的条形统计图.请根据图中信息解决下列问题:(1)本次抽查活动中共抽查了多少名学生?(2)请估算该城区视力不低于4.8的学生所占的比例,用扇形统计图在图5中表示出来.(3)假设该城区八年级共有4000名学生,请估计这些学生中视力低于4.8的学生约有多少人?得分评卷员得分评卷员得分评卷员x32100-1-3-2图5图4学生人数年级九年级八年级七年级800600400200视力低于4.8视力不低于4.8中考资源网中考资源网期待您的投稿!zkzyw@163.com-4-20.(本题满分6分)如图6,四边形ABCD中,AB∥CD,∠B=∠D,3,6ABBC,求四边形ABCD的周长.21.(本题满分6分)如图6,正方形网格中,△ABC为格点三角形(顶点都是格点),将△ABC绕点A按逆时针方向旋转90°得到11ABC△.(1)在正方形网格中,作出11ABC△;(不要求写作法)(2)设网格小正方形的边长为1cm,用阴影表示出旋转过程中线段BC所扫过的图形,然后求出它的面积.(结果保留π)22.(本题满分6分)如图8,热气球的探测器显示,从热气球看一栋高楼顶部的仰角为60,看这栋高楼底部的俯角为30,热气球与高楼的水平距离为66m,这栋高楼有多高?(结果精确到0.1m,参考数据:73.13)得分评卷员得分评卷员得分评卷员CAB图8BCA图7ADCB图6中考资源网中考资源网期待您的投稿!zkzyw@163.com-5-23.(本题满分8分)如图9,直线l与x轴、y轴分别交于点)0,8(M,点)6,0(N.点P从点N出发,以每秒1个单位长度的速度沿N→O方向运动,点Q从点O出发,以每秒2个单位长度的速度沿O→M的方向运动.已知点QP、同时出发,当点Q到达点M时,QP、两点同时停止运动,设运动时间为t秒.(1)设四边形...MNPQ的面积为S,求S关于t的函数关系式,并写出t的取值范围.(2)当t为何值时,QP与l平行?24.(本题满分8分)某校积极推进“阳光体育”工程,本学期在九年级11个班中开展篮球单循环比赛(每个班与其它班分别进行一场比赛,每班需进行10场比赛).比赛规则规定:每场比赛都要分出胜负,胜一场得3分,负一场得1分.(1)如果某班在所有的比赛中只得14分,那么该班胜负场数分别是多少?(2)假设比赛结束后,甲班得分是乙班的3倍,甲班获胜的场数不超过5场,且甲班获胜的场数多于乙班,请你求出甲班、乙班各胜了几场.得分评卷员得分评卷员得分评卷员图9lQQqOMNxyP中考资源网中考资源网期待您的投稿!zkzyw@163.com-6-25.(本题满分10分)如图10,AB是⊙O的直径,C是弧BD的中点,CE⊥AB,垂足为E,BD交CE于点F.(1)求证:CFBF;(2)若2AD,⊙O的半径为3,求BC的长.26.(本题满分10分)如图11,已知抛物线baxaxy22(0a)与x轴的一个交点为(10)B,,与y轴的负半轴交于点C,顶点为D.(1)直接写出抛物线的对称轴,及抛物线与x轴的另一个交点A的坐标;(2)以AD为直径的圆经过点C.①求抛物线的解析式;②点E在抛物线的对称轴上,点F在抛物线上,且以EFAB,,,四点为顶点的四边形为平行四边形,求点F的坐标.得分评卷员CBEFADO图10OxyABCD图11中考资源网中考资源网期待您的投稿!zkzyw@163.com-7-2009年柳州市初中毕业升学考试数学参考答案及评分标准第Ⅰ卷:一、选择题题号123456答案CCABBD第Ⅱ卷:二、填空题题号78910111213141516答案3圆、矩形等3465)21(xx112364三、解答题:17.本小题满分6分.解:原式=533xx··················································································2分=22x·······················································································4分当2x时,原式=222·································································5分=6········································································6分(说明:如果直接求值,没有进行化简,结果正确扣1分)18.本小题满分6分.解:由①得:13x··············································································1分即2x···············································································2分由②得:62x··········································································3分即3x··········································································4分∴原不等式的解集为23x·····························································5分在数轴上表示为:·······················6分19.本小题满分6分.解:(1)本次抽查活动中共抽查了2100名学生.·················································2分;(2)本次抽查中视力不低于4.8的学生人数为1400人,比例为32,约占67%.所以该城区视力不低于4.8的学生约占67%.扇形统计图表示为:………………………………4分x3210-1-3-2图5阴影部分为视力不低于4.8人数,占32,约67%中考资源网中考资源网期待您的投稿!zkzyw@163.com-8-(说明:图中只要标对扇形圆心角为240°,或标明所占比例正确的,都不扣分)(3)抽查知在八年级的学生中,视力低于4.8的学生所占比例为800300,则该城区八年级视力低于4.8的学生人数约为:15004000800300人.·····································6分20、本小题满分6分.解法一:∵ABCD∥∴180CB············································1分又∵BD∴180DC·········································2分∴AD∥BC即得ABCD是平行四边形··················4分∴36ABCDBCAD,···························5分∴四边形ABCD的周长183262··············6分解法二:连接AC······················································1分∵ABCD∥∴DCABAC············································2分又∵BDACCA,····································3分∴ABC△≌CDA△···········································4分∴36ABCDBCAD,····························5分∴四边形ABCD的周长183262··············6分解法三:连接BD······················································1分∵ABCD∥∴CDBABD·············································2分又∵ABCCDA∴ADBCBD····