最新安徽芜湖中考数学试题附参考答案优秀名师资料.doc
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1、2011安徽芜湖中考数学试题(附参考答案)2011年安徽省芜湖市中考数学试卷 一、选择题(本大题共l0小题,每小题4分,共40分() ,81.的相反数是( ) 11,8A( B. C. D. 8 ,882.我们身处在自然环境中,一年接受的宇宙射线及其它天然辐射照射量约为3 1 00微西弗(1西弗等于1000毫西弗,1毫西弗等于1000微西弗),用科学记数法可表示为( ) 63,3,6A(西弗 8(西弗 C(西弗 D(西弗 3.110,3.110,3.110,3.110,3.如图所示,下列几何体中主视图、左视图、俯视图都相同的是( )。: 4.函数中,自变量的取值范围是( ) xyx,6x,6x
2、,6x,6x,6A B C. D. 253x,5.分式方程的解是( ), xx,22x,2x,2x,1x,1x,2 A( B( C( D(或 6.如图,已知?ABC中,?ABC=45?,F是高AD和BE的交点,CD=4,则线段DF的长度为( ) 223242A( B(4 C( D( 7(已知直线经过点(k,3)和(1,k),则k的值为( ) ykxb,,3,32,2A( B( C( D( 8(如图,直径为10的?A山经过点C(0,5)和点0(0,0),B是y轴右侧?A优弧上一点,则?OBC的余弦值为( ) 1343A. B( C. D( 2452a,4a,19(如图,从边长为()cm的正方形纸
3、片中剪去一个边长为()cma,0的正方形(),剩余部分沿虚线又剪拼成一个矩形(不重叠无缝隙),则矩形的面积为( ) 22222A( B( C( D( (25)aacm,(315)acm,(69)acm,(615)acm,personal and collective learning on your own, combining learning reading and discussion, read, learn, and understanding of the original principles, focused learning around topics discussion,
4、 ongoing positive and negative type education. Members should close their own thoughts, work, real life, comparing reflection and further improve the pertinence and effectiveness of learning, continue to unlock the buttons, correct wrong, think of practical realization in mind, party rules disciplin
5、e, firm and correct political orientation, develop discipline, and being a qualified member of the adherence to the Constitution Party rules and political 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 knowled
6、ge, qualified party member, is the focus of this study and education and essential point. A qualified party members not only to watch his Constitution Party rules and talk to learn how, through, dark and light, and also what does he end up doing, is not a unity. This study and education, is essentia
7、l to enhance the partys political awareness, awareness of overall, core, par. In learning education in the, each members are to control told political, and has faith, do political qualified; told rules, and has discipline, do implementation discipline qualified; told moral, and has conduct, do condu
8、ct qualified; told dedication, and has as, do play role qualified four told four has this put ruler, often measure himself, view himself, transformation himself, with actual action reflected learn of effectiveness, and reflected belief faith of power. To firm to to Central par, to XI General Secreta
9、ry par, to party of theory, and route, and approach par, to Central of the decision deployment par, strongly maintenance Central of authority, maintenance XI General Secretary this core, strongly obey Central of concentrated unified led, in thought, and political a210.二次函数的图象如图所示,则反比例函数与一次函数在同一坐y,yb
10、xc,,yaxbxc,,x标系中的大致图象是( ) 二、填空题(本大题共6小题(每小题5分(共30分() 11(一个角的补角是36?35(这个角是_。 33212(因式分解 =_。 xxyxy,,2237xy,,13.方程组解是_。 ,xy,38,bab,ab,2814(已知、为两个连续的整数,且,则=_。 aky,15.如图,在平面直角坐标系中有一正方形AOBC,反比例函数经过正方形AOBC对角线的交点,x422,半径为()的圆内切于?ABC,则k的值为_。 16.如图,在正方形ABCD内有一折线段,其中AE?EF,EF?FC,并且AE=6,EF=8,FC=10,则正方形与其外接圆之间形成的
11、阴影部分的面积为_。 三、解答题(本大题共8小题,共80分() 17(本题共两小题(每小题6分(满分l2分) 1520113000,,,(1)()(cos68)338sin60 (1)计算: ,2351 x,?,(2)求满足不等式组的整数解。 ,51812 x,?,18(本小题满分8分) 如图,某校数学兴趣小组的同学欲测量一座垂直于地面的古塔BD的高度,他们先在A处测得古塔顶端点D的仰角为45?,再沿着BA的方向后退20m至C处,测得古塔顶端点D的仰角为30?。31.732,求该古塔BD的高度(,结果保留一位小数)。 2ntrated unified led, in thought, and
12、politicalconce ployment par, strongly maintenance Central of authority, maintenance XI General Secretary this core, strongly obey Central ofo to Central par, to XI General Secretary par, to party of theory, and route, and approach par, to Central of the decision defirm timself, transformation himsel
13、f, with actual action reflected learn of effectiveness, and reflected belief faith of power. To fied; told dedication, and has as, do play role qualified four told four has this put ruler, often measure himself, view hquali al qualified; told rules, and has discipline, do implementation discipline q
14、ualified; told moral, and has conduct, do conducts of overall, core, par. In learning education in the, each members are to control told political, and has faith, do politicarenest does he end up doing, is not a unity. This study and education, is essential to enhance the partys political awareness,
15、 awied party members not only to watch his Constitution Party rules and talk to learn how, through, dark and light, and also whaalifto do, and the unity of knowledge, qualified party member, is the focus of this study and education and essential point. A qu political discipline. Second, to do as the
16、 key, seriously, do try to do, to set an example. Two lies in the doing. To learn es andorrect political orientation, develop discipline, and being a qualified member of the adherence to the Constitution Party rulng, continue to unlock the buttons, correct wrong, think of practical realization in mi
17、nd, party rules discipline, firm and clearniould close their own thoughts, work, real life, comparing reflection and further improve the pertinence and effectiveness of the original principles, focused learning around topics discussion, ongoing positive and negative type education. Members shpersona
18、l and collective learning on your own, combining learning reading and discussion, read, learn, and understanding of 19(本小题满分8分) 某中学开展“唱红歌”比赛活动,九年级(1)、(2)班根据初赛成绩,各选出5名选手参加复赛,两个班各选出的5名选手的复赛成绩(满分为i00分)如图所示( (1)根据图示填写下表; (2)结合两班复赛成绩的平均数和中位数,分析哪个班级的复赛成绩较好; (3)计算两班复赛成绩的方差。 20.(本小题满分8分) 如图,用两段等长的铁丝恰好可以分别围成
19、一个正五边形和一个正六边形,其中正五边形的边长为22x,0x,17xx,2(),正六边形的边长为()cm(其中),求这两段铁丝的总长 cm21 (本小题满分8分) 如图,在梯形ABCD中,DC?AB,AD=BC, BD平分?ABC,?A=60?,过点D作DE?AB,过点C作CF?BD,垂足分别为E、F,连接EF,求证:?DEF为等边三角形。 3eral Secretary this core, strongly obey Central of concentrated unified led, in thought, and politicale, and approach par, to C
20、entral of the decision deployment par, strongly maintenance Central of authority, maintenance XI Gend routtiveness, and reflected belief faith of power. To firm to to Central par, to XI General Secretary par, to party of theory, ano learn how, through, dark and light, and also what does he end up do
21、ing, is not a unity. This study and education, is essenthas this put ruler, often measure himself, view himself, transformation himself, with actual action reflected learn of effecfour qualified; told moral, and has conduct, do conduct qualified; told dedication, and has as, do play role qualified f
22、our toldcontrol told political, and has faith, do political qualified; told rules, and has discipline, do implementation discipline re to ial to enhance the partys political awareness, awareness of overall, core, par. In learning education in the, each members alk tthis study and education and essen
23、tial point. A qualified party members not only to watch his Constitution Party rules and ta 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 to do,ber of the adherence to the Constitution Party rules and political disciplin
24、e. Second, to do as the key, seriously, do try zation in mind, party rules discipline, firm and correct political orientation, develop discipline, and being a qualified memrealither improve the pertinence and effectiveness of learning, continue to unlock the buttons, correct wrong, think of practica
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