2015年山东省临沂市中考数学试卷解析.pdf

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1、2015 年山东省临沂市中考数学试卷一、选择题本大题共14 小题,每题3分,共 42 分,在每题给出的四个选项中,只有一项是符合题目要求的1 3 分 2015?临沂的绝对值是ABC 2 D 2 2 3 分 2015?临沂如图,直线a b,1=60,2=40,则 3 等于A 40 B 60 C 80 D 1003 3 分 2015?临沂以下计算正确的选项是A a2+a2=2a4 B a2b3=a6b3 C a2?a3=a6 D a8 a2=a44 3 分 2015?临沂某市6 月某周内每天的最高气温数据如下单位:24 26 29 26 29 32 29 则这组数据的众数和中位数分别是A 29,2

2、9 B 26,26 C 26,29 D 29,32 5 3 分 2015?临沂如下图,该几何体的主视图是ABCD6 3 分 2015?临沂不等式组的解集,在数轴上表示正确的选项是ABCD7 3 分 2015?临沂一天晚上,小丽在清洗两只颜色分别为粉色和白色的有盖茶杯时,突然停电了,小丽只好把杯盖和茶杯随机搭配在一起,则其颜色搭配一致的概率是ABCD 1 8 3 分 2015?临沂如图A,B,C 是O 上的三个点,假设 AOC=100 ,则 ABC 等于A 50 B 80 C 100 D 1309 3 分 2015?临沂多项式mx2m 与多项式x2 2x+1 的公因式是A x1 B x+1 C

3、x21 D x 1210 3 分 2015?临沂已知甲、乙两地相距20 千米,汽车从甲地匀速行驶到乙地,则汽车行驶时间 t单位:小时关于小时速度v单位:千米/小时的函数关系式是A t=20v B t=C t=D t=11 3 分 2015?临沂观察以下关于x 的单项式,探究其规律:x,3x2,5x3,7x4,9x5,11x6,按照上述规律,第2015 个单项式是A 2015x2015 B 4029x2014 C 4029x2015 D 4031x201512 3 分 2015?临沂如图,四边形ABCD 为平行四边形,延长AD 到 E,使 DE=AD,连接 EB,EC,DB,添加一个条件,不能使

4、四边形DBCE 成为矩形的是文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4

5、T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E

6、4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1

7、E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P

8、1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5

9、P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R

10、5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10文档编码:CQ10S9J9E10T2 HM1R5P1E4T8 ZE6F1X8B4R10A AB=BE B DE DC C ADB=

11、90 D CEDE 13 3 分 2015?临沂要将抛物线y=x2+2x+3 平移后得到抛物线y=x2,以下平移方法正确的选项是A 向左平移1 个单位,再向上平移2 个单位B 向左平移 1 个单位,再向下平移2 个单位C 向右平移 1 个单位,再向上平移2 个单位D 向右平移1 个单位,再向下平移2 个单位14 3 分 2015?临沂在平面直角坐标系中,直线y=x+2 与反比例函数y=的图象有唯一公共点,假设直线y=x+b 与反比例函数y=的图象有2 个公共点,则b 的取值范围是A b2 B 2b2 C b2 或 b 2 D b 2 二、填空题本大题共5 小题,每题3 分,共 15 分15 3

12、 分 2015?临沂比较大小:2填“”、“=”、“”16 3 分 2015?临沂计算:=17 3 分 2015?临沂如图,在?ABCD 中,连接 BD,AD BD,AB=4,sinA=,则?ABCD 的面积是文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3

13、Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5

14、 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3

15、Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5

16、 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3

17、Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5

18、 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P818 3 分 2015?临沂如图,在 ABC 中,BD,CE 分别是边AC,AB 上的中线,BD 与 CE 相交于点 O,则=19 3 分 2015?临

19、沂定义:给定关于x 的函数 y,对于该函数图象上任意两点x1,y1,x2,y2,当 x1 x2时,都有y1y2,称该函数为增函数,根据以上定义,可以判断下面所给的函数中,是增函数的有填上所有正确答案的序号 y=2x;y=x+1;y=x2x0;y=三、解答题本大题共7 小题,共63 分20 7 分 2015?临沂计算:+1+121 7 分 2015?临沂“保护环境,人人有责”,为了了解某市的空气质量情况,某校环保兴趣小组,随机抽取了2014 年内该市假设干天的空气质量情况作为样本进行统计,绘制了如下图的条形统计图和扇形统计图部分信息未给出请你根据图中提供的信息,解答以下问题:1补全条形统计图;2

20、估计该市这一年365 天空气质量到达“优”和“良”的总天数;3计算随机选取这一年内某一天,空气质量是“优”的概率文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码

21、:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2

22、X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码

23、:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2

24、X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码

25、:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2

26、X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P822 7 分 2015?临沂小强从自己家的阳台上,看一栋楼顶部的仰角为30,看这栋楼底部的俯角为 60,小强家与这栋楼的水平距离为42m,这栋楼有多高?23 9 分 2015?临沂如图,点O 为 Rt ABC 斜边 AB 上一点,以OA 为半径的

27、O 与 BC 切于点 D,与 AC 交于点 E,连接 AD 1求证:AD 平分 BAC;2假设 BAC=60 ,OA=2,求阴影部分的面积结果保留 24 9 分 2015?临沂新农村社区改造中,有一部分楼盘要对外销售,某楼盘共23 层,销售价格如下:第八层楼房售价为4000 元/米2,从第八层起每上升一层,每平方米的售价提高50 元;反之,楼层每下降一层,每平方米的售价降低30 元,已知该楼盘每套楼房面积均为120 米2假设购买者一次性付清所有房款,开发商有两种优惠方案:方案一:降价8%,另外每套楼房赠送a元装修基金;方案二:降价10%,没有其他赠送1请写出售价y元/米2与楼层x1 x 23,

28、x 取整数之间的函数关系式;2老王要购买第十六层的一套楼房,假设他一次性付清购房款,请帮他计算哪种优惠方案更加合算25 11 分 2015?临沂如图1,在正方形ABCD 的外侧,作两个等边三角形ADE 和 DCF,连接AF,BE1请判断:AF 与 BE 的数量关系是,位置关系是;2如图 2,假设将条件“两个等边三角形ADE 和 DCF”变为“两个等腰三角形ADE 和 DCF,且EA=ED=FD=FC”,第 1问中的结论是否仍然成立?请作出判断并给予说明;3假设三角形ADE 和 DCF 为一般三角形,且 AE=DF,ED=FC,第1问中的结论都能成立吗?请直接写出你的判断文档编码:CD9J2U4

29、K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6

30、U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4

31、K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6

32、U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4

33、K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6

34、U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4

35、K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P826 13 分 2015?临沂在平面直角坐标系中,O 为原点,直线y=2x1 与 y 轴交于点A,与直线 y=x 交于点 B,点 B 关于原点的对称点为点C1求过 A,B,C 三点的抛物线的解析式;2P 为抛物线上一点,它关于原点的对称点为Q 当四边形PBQC 为菱形时,求点P 的坐标;假设点 P 的横坐标为t 1t1,当 t 为何值时,四边形PBQC 面积最大?并说明理由2015

36、 年山东省临沂市中考数学试卷参考答案与试题解析一、选择题本大题共14 小题,每题3分,共 42 分,在每题给出的四个选项中,只有一项是符合题目要求的1 3 分 2015?临沂的绝对值是ABC 2 D 2 考点:绝对值分析:根据负数的绝对值等于它的相反数解答解答:解:的绝对值是文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档

37、编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8

38、U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档

39、编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8

40、U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档

41、编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8

42、U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8故选:A点评:此题考查了绝对值,一个正数的绝对值是它本身;一个负数的绝对值是它的相反

43、数;0 的绝对值是 02 3 分 2015?临沂如图,直线a b,1=60,2=40,则 3 等于A 40 B 60 C 80 D 100考点:平行线的性质分析:根据对顶角相等和利用三角形的内角和定理列式计算即可得解解答:解:如图:4=2=40,5=1=60,3=180 60 40=80,故选 C点评:此题考查了平行线的性质,三角形的内角和定理,熟记性质并准确识图理清各角度之间的关系是解题的关键3 3 分 2015?临沂以下计算正确的选项是A a2+a2=2a4 B a2b3=a6b3 C a2?a3=a6 D a8 a2=a4考点:同底数幂的除法;合并同类项;同底数幂的乘法;幂的乘方与积的乘

44、方分析:根据同底数幂的乘除法、合并同类项以及积的乘方和幂的乘方进行计算即可解答:解:A、a2+a2=2a2B,故 A 错误;B、a2b3=a6b3,故 B 正确;C、a2?a3=a5,故 C 错误;D、a8 a2=a6,故 D 错误;故选 B点评:此题考查了同底数幂的乘除法、合并同类项以及积的乘方和幂的乘方,是基础知识要熟练掌握4 3 分 2015?临沂某市6 月某周内每天的最高气温数据如下单位:文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3

45、S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8

46、文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3

47、S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8

48、文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3

49、S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8

50、文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3S8U2X2I4 ZY6U7R3Q5P8文档编码:CD9J2U4K7O5 HO3

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