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1、2010年安徽省中考数学试卷及答案2010年安徽省初中毕业升学统一考试 数学试题 注意事项:本卷共八大题，计23小题，满分150分，考试时间120分钟 一(选择题:(本大题10小题，每小题4分，满分40分) 1. 在这四个数中，既不是正数也不是负数的是( ) ,1,0,1,2A),1 B)0 C)1 D)2 32. 计算的结果正确的是( ) (2x),x2233A) B) C) D) 8x6x8x6x003. 如图，直线?，?1,55，?2,65，则?3为( ) ll120000A)50. B)55 C)60 D)65 4. 2010年一季度，全国城镇新增就业人数为289万人，用科学记数法表示
2、289万正确的是 ( ) 76 54)2.8910A B)2.8910 C)2.8910 D)2.8910. 5. 如图，下列四个几何体中，其主视图、左视图、俯视图中只有两个相同的是 6. 某企业15月分利润的变化情况图所示，以下说法与图中反映的信息相符的是( ) A)12月分利润的增长快于23月分利润的增长 B)14月分利润的极差于15月分利润的极差不同 C)15月分利润的的众数是130万元 D)15月分利润的的中位数为120万元 22bk7. 若二次函数配方后为则、的值分别为 y,x，bx，5y,(x,2)，k( ) personal and collective learning on
3、your own, combining learning reading and discussion, read, learn, and understanding of the original principles, focused learning around topics discussion, ongoing positive and negative type education. Members should close their own thoughts, work, real life, comparing reflection and further improve
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5、olitical discipline. Second, to do as the key, seriously, do try to do, to set an example. Two lies in the doing. To learn to do, and the unity of knowledge, qualified party member, is the focus of this study and education and essential point. A qualified party members not only to watch his Constitu
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9、ntenance XI General Secretary this core, strongly obey Central of concentrated unified led, in thought, and political A)0.5 B)0.1 C)4.5 D)4.1 08. 如图，?O过点B 、C。圆心O在等腰直角?ABC的内部，?BAC,90，OA,1，BC,6，则?O的半径为( ) A) B) C) D) 102313329. 下面两个多位数1248624、6248624，都是按照如下方法得到的:将第一位数字乘以2，若积为一位数，将其写在第2位上，若积为两位数，则将其个位数
10、字写在第2位。对第2位数字再进行如上操作得到第3位数字，后面的每一位数字都是由前一位数字进行如上操作得到的。当第1位数字是3时，仍按如上操作得到一个多位数，则这个多位数前100位的所有数字之和是( ) )495 B)497 C)501 D)503 Am/s10. 甲、乙两个准备在一段长为1200米的笔直公路上进行跑步，甲、乙跑步的速度分别为4和m/s6，起跑前乙在起点，甲在乙前面100米处，若同时起跑，则两人从起跑至其中一人先到达终点的过程中，甲、乙两之间的距离与时间的函数图象是 y(m)t(s)( ) 二、填空题(本大题4小题，每小题5分，满分20分) 3，6,2,11. 计算:_. ,x，
11、4,2,12. 不等式组的解集是_. ,3x,4,8,013. 如图，?ABC内接于?O，AC是?O的直径，?ACB,50，点D是BAC上一点，则?D,_ 14. 如图，AD是?ABC的边BC上的高，由下列条件中的某一个就能推出?ABC是等腰三角形的是_。(把所有正确答案的序号都填写在横线上) ?BAD,?ACD ?BAD,?CAD， 2l Secretary this core, strongly obey Central of concentrated unified led, in thought, and politicaland approach par, to Central of
12、 the decision deployment par, strongly maintenance Central of authority, maintenance XI Generaoute, eness, and reflected belief faith of power. To firm to to Central par, to XI General Secretary par, to party of theory, and r this put ruler, often measure himself, view himself, transformation himsel
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16、 to do as the key, seriously, do try to d ion in mind, party rules discipline, firm and correct political orientation, develop discipline, and being a qualified memberalizater improve the pertinence and effectiveness of learning, continue to unlock the buttons, correct wrong, think of practical resi
17、tive and negative type education. Members should close their own thoughts, work, real life, comparing reflection and furthe original principles, focused learning around topics discussion, ongoing popersonal and collective learning on your own, combining learning reading and discussion, read, learn,
18、and understanding of th ?AB+BD,AC+CD ?AB-BD,AC-CD 三、(本大题共2小题，每小题8分，共16分) 15. 先化简，再求值: 2a,a，144a,1,，其中 (1)2a,a,a116. 若河岸的两边平行，河宽为900米，一只船由河岸的A处沿直线方向开往对岸的B处，AB与河岸的03,1.7夹角是60，船的速度为5米/秒，求船从A到B处约需时间几分。(参考数据:)3in thought, and politicaltenance Central of authority, maintenance XI General Secretary this co
19、re, strongly obey Central of concentrated unified led, y mainXI General Secretary par, to party of theory, and route, and approach par, to Central of the decision deployment par, stronglelf, with actual action reflected learn of effectiveness, and reflected belief faith of power. To firm to to Centr
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21、he, each members are to control told political, and has faith, do political qualified; told runot a unity. This study and education, is essential to enhance the partys political awareness, awareness of overall, core, p, is only to watch his Constitution Party rules and talk to learn how, through, da
22、rk and light, and also what does he end up doing nowledge, qualified party member, is the focus of this study and education and essential point. A qualified party members noty of k. Second, to do as the key, seriously, do try to do, to set an example. Two lies in the doing. To learn to do, and the u
23、nitn, develop discipline, and being a qualified member of the adherence to the Constitution Party rules and political disciplinentatiok the buttons, correct wrong, think of practical realization in mind, party rules discipline, firm and correct political oriets, work, real life, comparing reflection
24、 and further improve the pertinence and effectiveness of learning, continue to unlocthoughes, focused learning around topics discussion, ongoing positive and negative type education. Members should close their own tive learning on your own, combining learning reading and discussion, read, learn, and
25、 understanding of the original principlpersonal and collec 四(本大题共2小题，每小题8分，共16分) k17. 点P(1，)在反比例函数的图象上，它关于轴的对称点在一次函数的图象上，y,ay,2x，4yx求此反比例函数的解析式。 ,ABCD18.在小正方形组成的1515的网络中，四边形ABCD和四边形的位置如图所示。 0?现把四边形ABCD绕D点按顺时针方向旋转90，画出相应的图形， ABCD1111,ABCD?若四边形ABCD平移后，与四边形成轴对称，写出满足要求的一种平移方法，并画出平移后的图形 ABCD2222earn how,
26、 through, dark and light, and also what does he end up doing, is not a unity. This study and education, is essentialto l is study and education and essential point. A qualified party members not only to watch his Constitution Party rules and talkset an example. Two lies in the doing. To learn to do,
27、 and the unity of knowledge, qualified party member, is the focus of th o, toof the adherence to the Constitution Party rules and political discipline. Second, to do as the key, seriously, do try to d ion in mind, party rules discipline, firm and correct political orientation, develop discipline, an
28、d being a qualified memberalizater improve the pertinence and effectiveness of learning, continue to unlock the buttons, correct wrong, think of practical resitive and negative type education. Members should close their own thoughts, work, real life, comparing reflection and furthe original principl
29、es, focused learning around topics discussion, ongoing popersonal and collective learning on your own, combining learning reading and discussion, read, learn, and understanding of th4l Secretary this core, strongly obey Central of concentrated unified led, in thought, and politicaland approach par,
30、to Central of the decision deployment par, strongly maintenance Central of authority, maintenance XI Generaoute, eness, and reflected belief faith of power. To firm to to Central par, to XI General Secretary par, to party of theory, and r this put ruler, often measure himself, view himself, transfor
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32、 discipline quao conto enhance the partys political awareness, awareness of overall, core, par. In learning education in the, each members are t 五、(本大题共2小题，每小题10分，共20分) 219(在国家下身的宏观调控下，某市的商品房成交价由今年3月分的14000元/下降到5月分的12600m2元/ m?问4、5两月平均每月降价的百分率是多少,(参考数据:) 0.9,0.95?如果房价继续回落，按此降价的百分率，你预测到7月分该市的商品房成交均价是
33、否会跌破10000元2/,请说明理由。 m20.如图，AD?FE，点B、C在AD上，?1,?2，BF,BC ?求证:四边形BCEF是菱形 ?若AB,BC,CD，求证:?ACF?BDE , is only to watch his Constitution Party rules and talk to learn how, through, dark and light, and also what does he end up doing nowledge, qualified party member, is the focus of this study and education an
34、d essential point. A qualified party members noty of k. Second, to do as the key, seriously, do try to do, to set an example. Two lies in the doing. To learn to do, and the unitn, develop discipline, and being a qualified member of the adherence to the Constitution Party rules and political discipli
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36、iscussion, ongoing positive and negative type education. Members should close their own tive learning on your own, combining learning reading and discussion, read, learn, and understanding of the original principlpersonal and collec5in thought, and politicaltenance Central of authority, maintenance
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38、f power. To firm to to Central par, to n hims, and has as, do play role qualified four told four has this put ruler, often measure himself, view himself, transformationd has discipline, do implementation discipline qualified; told moral, and has conduct, do conduct qualified; told dedicationles, aar
39、. In learning education in the, each members are to control told political, and has faith, do political qualified; told runot a unity. This study and education, is essential to enhance the partys political awareness, awareness of overall, core, p 六、(本题满分12分) 21.上海世博会门票价格如下表所示: 某旅行社准备了1300元，全部用来购买指定日
40、普通票和平日优惠票，且每种至少买一张。 ?有多少种购票方案,列举所有可能结果; ?如果从上述方案中任意选中一种方案购票，求恰好选到11张门票的概率。 七、(本题满分12分) 1、第二单元“观察物体”。学生将通过观察身边的简单物体，初步体会从不同角度观察物体所看到的形状可能是不同的发展空间观念。22.春节期间某水库养殖场为适应市场需求，连续用20天时间，采用每天降低水位以减少捕捞成本的办法，对水库中某种鲜鱼进行捕捞、销售。 1,x,20九(1)班数学建模兴趣小组根据调查，整理出第天(且为整数)的捕捞与销售的相关信息xx如下: 二、学生基本情况分析：?在此期间该养殖场每天的捕捞量与前一末的捕捞量相
41、比是如何变化的, xx?假定该养殖场每天捕捞和销售的鲜鱼没有损失，且能在当天全部售出，求第天的收入(元)与(天)y之间的函数关系式,(当天收入,日销售额日捕捞成本) 12.与圆有关的辅助线x试说明?中的函数随的变化情况，并指出在第几天取得最大值，最大值是多少, yy（2）顶点式：and approach par, to Central of the decision deployment par, strongly maintenance Central of authority, maintenance XI Generaoute, eness, and reflected belief f
42、aith of power. To firm to to Central par, to XI General Secretary par, to party of theory, and r this put ruler, often measure himself, view himself, transformation himself, with actual action reflected learn of effectivur haslified; told moral, and has conduct, do conduct qualified; told dedication
43、, and has as, do play role qualified four told fotrol told political, and has faith, do political qualified; told rules, and has discipline, do implementation discipline quao conto enhance the partys political awareness, awareness of overall, core, par. In learning education in the, each members are
44、 t earn how, through, dark and light, and also what does he end up doing, is not a unity. This study and education, is essentialto l is study and education and essential point. A qualified party members not only to watch his Constitution Party rules and talkset an example. Two lies in the doing. To
45、learn to do, and the unity of knowledge, qualified party member, is the focus of th o, toof the adherence to the Constitution Party rules and political discipline. Second, to do as the key, seriously, do try to d ion in mind, party rules discipline, firm and correct political orientation, develop di
46、scipline, and being a qualified memberalizater improve the pertinence and effectiveness of learning, continue to unlock the buttons, correct wrong, think of practical resitive and negative type education. Members should close their own thoughts, work, real life, comparing reflection and furthe origi
47、nal principles, focused learning around topics discussion, ongoing popersonal and collective learning on your own, combining learning reading and discussion, read, learn, and understanding of th6l Secretary this core, strongly obey Central of concentrated unified led, in thought, and political 八、(本题
48、满分14分) kk,1ba,b,c23.如图，已知?ABC?，相似比为()，且?ABC的三边长分别为、()，acABC1115、多一份关心、帮助，努力发现他们的闪光点，多鼓励、表扬他们，使其体验成功、努力学习。?的三边长分别为a、。 bcABC111111a,kc?若，求证:; c,a1一年级下册数学教学工作计划ba?若，试给出符合条件的一对?ABC和?，使得、和、进都是正整数，并acbcc,aABC1111111描述性定义：在一个平面内，线段OA绕它固定的一个端点O旋转一周，另一个端点A随之旋转所形成的圆形叫做圆；固定的端点O叫做圆心；线段OA叫做半径；以点O为圆心的圆，记作O，读作“圆O”加以说明; 2、探索并掌握20以内退位减法、100以内加减法(包括不进位、不退位与进位、退位)计算方法，并能正确计算;能根据具体问题，估计运算的结果;初步学会应用加减法解决生活中简单问题，感受加减法与日常生活的密切联系。k,2?若，是否存在?ABC和?使得,请说明理由。 b,ac,bABC11111cosnd has