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1、2011淮安中考数学试题及答案2011年淮安中考数学试题 一、选择题,本大题共有8小题每小题3分共24分。在每小题所给出的四个选项中恰有一项是符合题目要求的请将正确选项前的字母代号填涂在答题卡相应位置上, (1( 3 的相反数是( ) 11A. -3 B. - C. D. 3 332(下列交通标志是轴对称图形的是( ) 3(据第六次全国人口普查数据公报，淮安市常住人口约为480万人. 480万(即4800000)用科学记数法可表示为( ) 4567A. 4.810 B. 4.810 C. 4.810 D. 4.810 4(如图所示的几何体的主视图是( ) 5(在菱形ABCD中，AB=5cm，则
2、此菱形的周长为( ) A. 5cm B. 15cm C. 20cm D. 25cm 6(某地区连续5天的最高气温(单位:?)分别是30,33,24,29,24.这组数据的中位数是( ) A.29 B.28 C.24 D.9 3x，27(不等式,的解集是 ( ) x20,2,12A. , B. , C. , D. , xxxxky,8(如图，反比例函数的图象经过点A(-1,-2). x则当x,1时，函数值y的取值范围是( ) A.y,1 B.0,y,1 C. y,2 D.0, y,2 Shang, and action Shang with to XI comrade for General S
3、ecretary of Central keep height consistent; any when are put discipline rules is in front, enhanced organization concept, and obey Organization decided; to set right of worldview, and Outlook on life And to lead a clean slim family, always adhere to the Communists spiritual home; to consciously prac
4、tice the partys purpose, keeping qualities. CPC requirements in section-level cadres above to be a benchmark, play an exemplary role, adhere to the loyal clean play, Jiao Yulu-a good cadre of activities carried out in the ordinary party members practicing pioneer standard post set up activities. We
5、all party members to further enhance political par core, situation awareness, awareness, awareness, belief and faith, according to positions, downtown River regulation, diversion of hydraulic Process, protection of the mother River, rural safety water drinking project, construction of flood control
6、and drought relief, water in ecological civilization construction and other key, think, often, more active, hands-on, disciplined and strict rules, play, courage, give full play to the exemplary role, the successful completion of tasks. Three reform as the core of real change, completely change, and
7、 change image. This fundamental aim of education in order to solve the problem, for this reason, we insist on problem-oriented, enhance the awareness of problems, problems of reform in place, continuous improvement in style, to better serve the people, to better promote the water conservancy work. F
8、irst of all, to find the problem. Im learning education programme, in view of the current construction of the party, proposed to focus on solution of fuzzy ideals and beliefs waver, consciousness, purpose of the party weak sense, honesty and self-discipline awareness is not strong, depressed, six is
9、sues of ethical misconduct. Vast numbers of party members and cadres should closely real life personal and ideological work, reflections on the standard control, check the pendulum problem, pinpoint problems, get real, deep, identification, find the main target, laying the Foundation for further cor
10、rective action implementation. 二、填空题(本大题共有10个小题，每小题3分，共30分。不需要写出解答过程，请把答案直接 写在答题卡相应位置上) 429(计算: . a,a,10(如图，在?ABC中，D、E分别是边AB、AC的中点，BC=8， 则DE= . 11(分解因式: . ax，ay,bb12(如图，直线、被直线所截，?，?1=70?，则aca?2= . 213(一元二次方程的解是 . x,4,0214(抛物线的顶点坐标是 . y,x,2x,315(在半径为6cm的圆中，60?的圆心角所对的弧等于 . 16(有一箱规格相同的红、黄两种颜色的小塑料球共1000
11、个.为了估计这两种颜色的球各有多少个，小明将箱子里面的球搅匀后从中随机摸出一个球记下颜色，再把它放回箱子中，多次重复上述过. 程后，发现摸到红球的频率约为0.6，据此可以估计红球的个数约为17(在四边形ABCD中，AB=DC，AD=BC.请再添加一个条件，使四边形ABCD是矩形.你添加的条件是 .(写出一种即可) 18(如图，在Rt?ABC中，?ABC=90?，?ACB=30?，将?ABC 绕点A按逆时针方向旋转15?后得到?ABC，BC交AC于点D， 111122如果AD=，则?ABC的周长等于 . 三、解答题,本大题共有10小题共96分。请在答题卡指定区域内作答解答时应写出必要的文字说明、
12、证明过程或演算步骤, 19.(本题满分8分) 022，,5，2,3，1(1)计算: (2)化简: ，a，b，ba,b20.(本题满分8分) 如图，四边形ABCD是平行四边形，EF分别是BC、AD上的点，?1=?2. 求证:?ABE?CDF. Shang, and action Shang with to XI comrade for General Secretary of Central keep height consistent; any when are put discipline rules is in front, enhanced organization concept, a
13、nd obey Organization decided; to set right of worldview, and Outlook on life And to lead a clean slim family, always adhere to the Communists spiritual home; to consciously practice the partys purpose, keeping qualities. CPC requirements in section-level cadres above to be a benchmark, play an exemp
14、lary role, adhere to the loyal clean play, Jiao Yulu-a good cadre of activities carried out in the ordinary party members practicing pioneer standard post set up activities. We all party members to further enhance political par core, situation awareness, awareness, awareness, belief and faith, accor
15、ding to positions, downtown River regulation, diversion of hydraulic Process, protection of the mother River, rural safety water drinking project, construction of flood control and drought relief, water in ecological civilization construction and other key, think, often, more active, hands-on, disci
16、plined and strict rules, play, courage, give full play to the exemplary role, the successful completion of tasks. Three reform as the core of real change, completely change, and change image. This fundamental aim of education in order to solve the problem, for this reason, we insist on problem-orien
17、ted, enhance the awareness of problems, problems of reform in place, continuous improvement in style, to better serve the people, to better promote the water conservancy work. First of all, to find the problem. Im learning education programme, in view of the current construction of the party, propos
18、ed to focus on solution of fuzzy ideals and beliefs waver, consciousness, purpose of the party weak sense, honesty and self-discipline awareness is not strong, depressed, six issues of ethical misconduct. Vast numbers of party members and cadres should closely real life personal and ideological work
19、, reflections on the standard control, check the pendulum problem, pinpoint problems, get real, deep, identification, find the main target, laying the Foundation for further corrective action implementation. 历届中考数学试题,中考数学试题 21. (本题满分8分) 如图，有牌面数字都是2,3,4的两组牌.从每组牌中各随机摸出一张，请用画树状图或列表的方法，求摸出的两张牌的牌面数字之和为6的
20、概率. 22. (本题满分8分) 七(1)班的大课间活动丰富多彩，小峰与小月进行跳绳比赛。在相同的时间内，小峰跳了100个，小月跳了140个。如果小月比小峰每分钟多跳20个，试求出小峰每分钟跳绳多少个, 23. (本题满分10分)题23-1图为平地上一幢建筑物与铁塔图，题23-2图为其示意图.建筑物AB与铁塔CD都垂直于底面，BD=30m，在A点测得D点的俯角为45?，测得C点的仰角为60?.求铁塔CD的高度. 24. (本题满分10分) 阳光中学九(1)班同学在一次综合实践活动中，对本县居民参加“全民医保”情况进行了调查，同学们利用节假日随机调查了2000人，对调查结果进行了统计分析，绘制出
21、两幅不完整的统计图: Shang, and action Shang with to XI comrade for General Secretary of Central keep height consistent; any when are put discipline,淮安中考数学试题 第 rules is in front, enhanced organization concept, and obey Organization decided; to set right of worldview, and Outlook on life And to lead a clean sl
22、im family, always adhere to the Communists spiritual home; to consciously practice the partys purpose, keeping qualities. CPC requirements in section-level cadres above to be a benchmark, play an exemplary role, adhere to the loyal clean play, Jiao Yulu-a good cadre of activities carried out in the
23、ordinary party members practicing pioneer standard post set up activities. We all party members to further enhance political par core, situation awareness, awareness, awareness, belief and faith, according to positions, downtown River regulation, diversion of hydraulic Process, protection of the mot
24、her River, rural safety water drinking project, construction of flood control and drought relief, water in ecological civilization construction and other key, think, often, more active, hands-on, disciplined and strict rules, play, courage, give full play to the exemplary role, the successful comple
25、tion of tasks. Three reform as the core of real change, completely change, and change image. This fundamental aim of education in order to solve the problem, for this reason, we insist on problem-oriented, enhance the awareness of problems, problems of reform in place, continuous improvement in styl
26、e, to better serve the people, to better promote the water conservancy work. First of all, to find the problem. Im learning education programme, in view of the current construction of the party, proposed to focus on solution of fuzzy ideals and beliefs waver, consciousness, purpose of the party weak
27、 sense, honesty and self-discipline awareness is not strong, depressed, six issues of ethical misconduct. Vast numbers of party members and cadres should closely real life personal and ideological work, reflections on the standard control, check the pendulum problem, pinpoint problems, get real, dee
28、p, identification, find the main target, laying the Foundation for further corrective action implementation. 3 页 (共 10 页) (注:图中A表示“城镇职工基本医疗保险”;B表示“城镇居民基本医疗保险”;C表示“新型农村合作医疗”;D表示其他情况) (1)补全条形统计图; (2)在本次调查中，B类人数占被调查人数的百分比为 ; (3)据了解，国家对B类人员每人每年补助155元.已知该县人口数约80万人，请估计该县B类人员每年享受国家补助共多少万元, 25. (本题满分10分) 如图
29、，AD是?O的弦，AB经过圆心O，交?O于点C，?DAB=?B=30?. (1)直线BD是否与?O相切,为什么, (2)连接CD，若CD=5，求AB的长. 26. (本题满分10分) 2如图，已知二次函数y= -x+bx+3的图象与x轴的一个交点为A(4,0)，与y轴交于点B. (1)求此二次函数关系式和点B的坐标; (2)在x轴的正半轴上是否存在点P，使得?PAB是以AB为底的等腰三角形,若存在，求出点P的坐标;若不存在，请说明理由. 27. (本题满分12分) Shang, and action Shang with to XI comrade for General Secretary
30、of Central keep height consistent; any when are put discipline rules is in front, enhanced organization concept, and obey Organization decided; to set right of worldview, and Outlook on life And to lead a clean slim family, always adhere to the Communists spiritual home; to consciously practice the
31、partys purpose, keeping qualities. CPC requirements in section-level cadres above to be a benchmark, play an exemplary role, adhere to the loyal clean play, Jiao Yulu-a good cadre of activities carried out in the ordinary party members practicing pioneer standard post set up activities. We all party
32、 members to further enhance political par core, situation awareness, awareness, awareness, belief and faith, according to positions, downtown River regulation, diversion of hydraulic Process, protection of the mother River, rural safety water drinking project, construction of flood control and droug
33、ht relief, water in ecological civilization construction and other key, think, often, more active, hands-on, disciplined and strict rules, play, courage, give full play to the exemplary role, the successful completion of tasks. Three reform as the core of real change, completely change, and change i
34、mage. This fundamental aim of education in order to solve the problem, for this reason, we insist on problem-oriented, enhance the awareness of problems, problems of reform in place, continuous improvement in style, to better serve the people, to better promote the water conservancy work. First of a
35、ll, to find the problem. Im learning education programme, in view of the current construction of the party, proposed to focus on solution of fuzzy ideals and beliefs waver, consciousness, purpose of the party weak sense, honesty and self-discipline awareness is not strong, depressed, six issues of e
36、thical misconduct. Vast numbers of party members and cadres should closely real life personal and ideological work, reflections on the standard control, check the pendulum problem, pinpoint problems, get real, deep, identification, find the main target, laying the Foundation for further corrective a
37、ction implementation. 历届中考数学试题,中考数学试题 小华观察钟面(题27-1图)，了解到钟面上的分针每小时旋转360度，时针每小时旋转30度.他为了进一步研究钟面上分针与时针的旋转规律，从下午2:00开始对钟面进行了一个小时的观察.为了研究方便，他将分针与时针原始位置OP(题27-2图)的夹角记为y度，时针与原始1位置OP的夹角记为y度(夹角是指不大于平角的角)，旋转时间记为t分钟，观察结束后，他2利用所得的数据绘制成图象(题27-3图)，并求出了y与t的函数关系式:16(030)tt?,. y,1,，6360(3060)tt,?,请你完成: (1)求出题27-3图中y
38、与t的函数关系式; 2(2)直接写出A、B两点的坐标，并解释这两点的实际意义; (3)若小华继续观察一小时，请你在题27-3图中补全图象. ,淮安中考数学试题Shang, and action Shang with to XI comrade for General Secretary of Central keep height consistent; any when are put discipline 第 rules is in front, enhanced organization concept, and obey Organization decided; to set rig
39、ht of worldview, and Outlook on life And to lead a clean slim family, always adhere to the Communists spiritual home; to consciously practice the partys purpose, keeping qualities. CPC requirements in section-level cadres above to be a benchmark, play an exemplary role, adhere to the loyal clean pla
40、y, Jiao Yulu-a good cadre of activities carried out in the ordinary party members practicing pioneer standard post set up activities. We all party members to further enhance political par core, situation awareness, awareness, awareness, belief and faith, according to positions, downtown River regula
41、tion, diversion of hydraulic Process, protection of the mother River, rural safety water drinking project, construction of flood control and drought relief, water in ecological civilization construction and other key, think, often, more active, hands-on, disciplined and strict rules, play, courage,
42、give full play to the exemplary role, the successful completion of tasks. Three reform as the core of real change, completely change, and change image. This fundamental aim of education in order to solve the problem, for this reason, we insist on problem-oriented, enhance the awareness of problems,
43、problems of reform in place, continuous improvement in style, to better serve the people, to better promote the water conservancy work. First of all, to find the problem. Im learning education programme, in view of the current construction of the party, proposed to focus on solution of fuzzy ideals
44、and beliefs waver, consciousness, purpose of the party weak sense, honesty and self-discipline awareness is not strong, depressed, six issues of ethical misconduct. Vast numbers of party members and cadres should closely real life personal and ideological work, reflections on the standard control, c
45、heck the pendulum problem, pinpoint problems, get real, deep, identification, find the main target, laying the Foundation for further corrective action implementation. 5 页 (共 10 页) 28. (本题满分12分) 如图，在Rt?ABC中，?C=90?，AC=8，BC=6，点P在AB上，AP=2.点E、F同时从点P出发，分别沿PA、PB以每秒1个单位长度的速度向点A、B匀速运动，点E到达点A后立即以原速度沿AB向点B运动，
46、点F运动到点B时停止，点E也随之停止.在点E、F运动过程中，以EF为边作正方形EFGH，使它与?ABC在线段AB的同侧，设E、F运动的时间为t秒(t,0)，正方形EFGH与?ABC重叠部分面积为S. (1)当t=1时，正方形EFGH的边长是 ; 当t=3时，正方形EFGH的边长是 ; (2) 当0,t?2时，求S与t的函数关系式; (3) 直接答出:在整个运动过程中，当t为何值时，S最大,最大面积是多少, (Shang, and action Shang with to XI comrade for General Secretary of Central keep height consis
47、tent; any when are put discipline rules is in front, enhanced organization concept, and obey Organization decided; to set right of worldview, and Outlook on life And to lead a clean slim family, always adhere to the Communists spiritual home; to consciously practice the partys purpose, keeping quali
48、ties. CPC requirements in section-level cadres above to be a benchmark, play an exemplary role, adhere to the loyal clean play, Jiao Yulu-a good cadre of activities carried out in the ordinary party members practicing pioneer standard post set up activities. We all party members to further enhance political par core, situation awareness, awareness, awareness, belief and faith, according to positions, downtown River regulation, diversion of hydraulic Process, protection of the mother River, rural safety water drinking project, construction of flood control