最新汕头中考模拟数学试题优秀名师资料.doc
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1、2012年汕头中考模拟数学试题2010年顺义区中考二模数学试题 1(本试卷共6页,共五道大题,25道小题,满分120分(考试时间120分钟( 2(在试卷和答题卡上认真填写学校、班级和姓名( 考 3(试题答案一律填涂或书写在答题卡上,在试卷上作答无效( 生 须 知 4(在答题卡上,选择题、作图题用2B铅笔作答,其他试题用黑色字迹签字笔作答( 5(考试结束,请将本试卷和答题卡一并交回( 一、选择题(共8个小题,每小题4分,共32分) 下列各题均有四个选项,其中只有一个是符合题意的( 1(5的倒数是 1,555A( B( C( D( 52(如果一个角等于54?,那么它的补角等于 A( B( C( D
2、( 146:36:126:54:3(据2010年上海世界博览会官方网站报道,在5月1日当天的入园人数为204 959人,将204 959用科学记数法表示并保留三个有效数字应为 55632.05010,2.0510,0.20510,20510,A( B( C( D( 4(如图所示的四个立体图形中,左视图是圆的个数是 圆柱 圆锥 圆台 球 A(4 B(3 C(2 D(1 5(为参加2010年“北京市初中毕业生升学体育考试”,小静同学进行了刻苦的练习,在测仰卧起坐时,记录下5次的成绩(单位:个)分别为:40,45,45,46,48(这组数据的众数、中位数依次是 A(45,45 B(45,45.5 C
3、(46,46 D(48,45.5 26(二次函数的顶点坐标是 yxx,24A(1,3), B(1,5), C(1,3), D(1,5), 7(甲、乙各抛一次质地均匀的正方体骰子,骰子的六个面上分别刻有1至6的点数,若甲、乙的点数相同时,算两人平手;若甲的点数大于乙时,算甲获胜;若乙的点数大于甲时,of the difference of the results. This value should be less than 0.5%. Defined for determination of whiteness of starches starch whiteness: under the s
4、tated conditions, surface of starch light reflectance standard Whiteboard surface and light reflectance ratio. Whiteness of whiteness meter measurements samples value to represent. 2, principle: Blu-ray through sample reflectivity reflectance contrast with the standard Whiteboard for Blu-ray, get sa
5、mples of whiteness. Measurement method applicable to dry into a powder of refined starches . Bai Duyi 3, instruments: wavelength can be transferred to 425nm box for sample and standard Whiteboard, accurate to 0.1. Press box: fit in the box. Step 4, analysis sample preparation: samples should be full
6、y mixed. Sample Board by: Bai Duyi samples box zhuangyang, according to Bai Duyi method sample Whiteboard prescribed. Bai Duyi preparation: method of operation required by Bai Duyi operation, will be marked with a white ceramic whiteboard or Whiteboard made of high purity magnesium oxide standard co
7、rrection. Measurement: determined by white Whiteboard Analyzer sample, write down the whiteness. Determination of number: the same sample for the second determination. 5, said of the results: the whiteness of whiteness of whiteness meter measurements samples value. Such as poor meets the requirement
8、s, take the arithmetic mean of the second determination as a result. 6, allowing differential analyst simultaneously or in quick succession for the second determination, the absolute value of the difference of the results. This value should be less than 0.2. Definition starch viscosity determination
9、 of starch viscosity: resistance to flow after samples of starch gelatinization. Used算乙获胜(则甲获胜的概率是 7511A( B( C( D( 121223y8(如图,有一圆形展厅,在其圆形边缘上的点处安装了一台监视器,它的监控角度是A3 ,(为了监控整个展厅,最少需在圆形边缘上共安装 这样的监视器65(2 (1,1) P1 ? A(5台 B(4台 C(3台 D(2台O ,1 2 3 第7题 ,1 x65二、填空题(本题共16分,每小题4分) A 25x, 09(若分式的值为,则x的值为 ( 32x,210(
10、已知一个扇形的半径为6cm,圆心角为150?,则这个扇形的面积为 ( cm211(若关于x的方程有实数根,则k的取值范围是 ( xxk,,30?ABC,,:ACB90,,:A6012(如图,在Rt中,(将A?ABC?ABC绕直角顶点C按顺时针方向旋转,得,AACAB斜边分别与BC、AB相交于点D、E,直角边与EFCDAC,2?ABC,则至少旋转 AB交于点F(若?ABC?ABC?ABC 度才能得到,此时与的重叠部分(即四边形CDEF)的面积为 ( CBD三、解答题(本题共30分,每小题5分) ,22010B13(计算:( 32cos3048(1),:,,5432,xx,,,14(解不等式组 并
11、求它的整数解( x,4,x.,3,32x,,215(解分式方程:( xx,21?ABC16(已知:如图,中,D、E为AC边的三等分点,EF?AB,交BD的延长线于F( F求证:点D是BF的中点( A DE BC22xx,2217(已知,求代数式的值( (1)(3)(3)(3)(1)xxxxx,,,,,of the difference of the results. This value should be less than 0.5%. Defined for determination of whiteness of starches starch whiteness: under the
12、 stated conditions, surface of starch light reflectance standard Whiteboard surface and light reflectance ratio. Whiteness of whiteness meter measurements samples value to represent. 2, principle: Blu-ray through sample reflectivity reflectance contrast with the standard Whiteboard for Blu-ray, get
13、samples of whiteness. Measurement method applicable to dry into a powder of refined starches . Bai Duyi 3, instruments: wavelength can be transferred to 425nm box for sample and standard Whiteboard, accurate to 0.1. Press box: fit in the box. Step 4, analysis sample preparation: samples should be fu
14、lly mixed. Sample Board by: Bai Duyi samples box zhuangyang, according to Bai Duyi method sample Whiteboard prescribed. Bai Duyi preparation: method of operation required by Bai Duyi operation, will be marked with a white ceramic whiteboard or Whiteboard made of high purity magnesium oxide standard
15、correction. Measurement: determined by white Whiteboard Analyzer sample, write down the whiteness. Determination of number: the same sample for the second determination. 5, said of the results: the whiteness of whiteness of whiteness meter measurements samples value. Such as poor meets the requireme
16、nts, take the arithmetic mean of the second determination as a result. 6, allowing differential analyst simultaneously or in quick succession for the second determination, the absolute value of the difference of the results. This value should be less than 0.2. Definition starch viscosity determinati
17、on of starch viscosity: resistance to flow after samples of starch gelatinization. Used初中数学辅导网 18(列方程或方程组解应用题: 某服装厂为学校艺术团制作100套演出服,售价每套40元(服装厂向25名家庭贫困学生免费提供(经核算,这25套演出服的成本正好是原定生产这批演出服的利润(问每套演出服的成本是多少元, 四、解答题(本题共20分,第19题5分,第20题6分,第21题5分,第22题4分) 19(如图,在等腰梯形ABCD中,AD?BC, DA,,:B45,AD=6,AB=,点E在BC32,,:E30的
18、延长线上,求BE的长( BEC 20(甲、乙两支篮球队在集训期内进行了五场比赛,将比赛成绩进行统计后,绘制成如图1、图2的统计图( 甲、乙两球队比赛成绩折线统计图 甲、乙两球队比赛成绩条形统计图 得分/分 得分/分 110 100 甲 110 90 98 95 80 91 90 87 86 83 80 80 70 甲队 60 50 乙队 40 30 20 10 0 一二三四五 场次/场 一二三四五 场次/场 图1 图2 /分 (1)在图2中画出折线表示乙队在集训期内这五场比赛成绩的变化情况; xx(2)已知甲队五场比赛成绩的平均分=90分,请你计算乙队五场比赛成绩的平均分; 甲乙(3)就这五场
19、比赛,分别计算两队成绩的极差; (4)如果从甲、乙两队中选派一支球队参加篮球锦标赛,根据上述统计情况,试从平均分、折线的走势、获胜场数和极差四个方面分别进行简要分析,你认为选派哪支球队参赛更能取得好成绩, D C,BAC21(如图,AB是?O的直径,BD交?O于点C,AE平分,Eof the difference of the results. This value should be less than 0.5%. Defined for determination of whiteness of starches starch whiteness: under the stated con
20、ditions, surface of starch light reflectance standard Whiteboard surface and light reflectance ratio. Whiteness of whiteness meter measurements samples value to represent. 2, principle: Blu-ray through sample reflectivity reflectance contrast with the standard Whiteboard for Blu-ray, get samples of
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