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2026年安徽省宿州市中考数学二模试卷

  • 2026-05-06 17:30:43
2026年安徽省宿州市中考数学二模试卷

2026年安徽省宿州市中考数学二模试卷

一、选择题(本大题共10小题,每小题4分,满分40分)

1.下列各数在数轴上对应的点离原点最近的数是(  )

A.﹣2B.C.1D.2

2.我国古代数学著作《九章算术》中研究过一种叫“鳖(bie)臑(nao)”的几何体.它指的是由四个直角三角形围成的四面体.如图放置的“鳖臑”的左视图为(  )

3.据海关数据,2025年中国全年进口原油577726000吨,用科学记数法表示为(  )

A.57.7726×107B.5.77726×108

C.5.77726×109D.0.577726×109

4.下列计算正确的是(  )

A.(2a2=4a2B.a2a3a6C.a3+a3a6D.

5.如图,在△ABC中,,且∠A=72°.则∠BPC的度数为(  )

A.108°B.120°C.144°D.150°

6.已知一次函数ykx+bk≠0)的图象与x轴交于点(﹣1,0),且不经过第四象限,则﹣2k+b的值(  )

A.大于0B.小于0C.等于0D.无法判断

7.如图是化学元素周期表的元素,从中随机选取两种元素,两种元素恰好一个是金属元素一个是非金属元素的概率为(  )

A.B.C.D.

8.已知实数p,q满足p2pq+q2=3,若y=3p﹣3q+pq,则y的最大值为(  )

A.B.C.D.4

9.二次函数yax2+bx+c的部分图象如图所示,则下列结论错误的是(  )

A.abc>0

B.3a+c>0

C.a+2b+4c>0

D.对任意实数m,都有a(1﹣m2)+b(1﹣m)≤0恒成立

10.如图,△ABC是等边三角形,边长为2,点D为边BC的中点,点E为边AB上的一动点,连接DE,将DE绕点D顺时针旋转60°,得到DF,连接CF,则CF的最小值为(  )

A.B.C.1D.

二、填空题(本大题共4小题,每小题5分,满分20分)

11.不等式的解集为 .

12.关于x的方程mx2﹣4x+1=0有实数根,则m的取值范围是 .

13.在平面直角坐标系中,一次函数y=2x+1与反比例函数交于A,B两点,点A在第一象限,与x轴交于C点,已知△AOC的面积为1,则△BOC的面积为 .

14.已知关于x的一元二次方程ax2+bx+c=0(a≠0)的两根为x1,x2,定义该方程两根的关联值Mx1+x2+x1x2

(1)若x2﹣5x+6=0,则关联值M .

(2)已知关于x的方程x2﹣(n+2)x+2n=0(n为整数,n≥1),若该方程关联值M满足1<M≤2026.则符合条件的整数n的和为 .

三、(本大题共2小题,每小题8分,满分16分)

15.计算:

16.如图,△ABC在边长为1个单位长度的小正方形组成的网格中:

(1)以O点为位似中心将△ABC在网格中放大两倍得到△A1B1C1,请画出△A1B1C1

(2)借助网格:连接线段BC1,用无刻度直尺作△OBC1BC1上的中线OD

四、(本大题共2小题,每小题8分,满分16分)

17.安徽有着得天独厚的地理环境以及适宜的气候,是有名的产茶大省,黄山毛峰、六安瓜片、太平猴魁、祁门红茶等均产自安徽.某商场计划购进AB两种茶叶,已知A种茶叶每盒的进价比B种茶叶每盒的进价少20元.若购进A种茶叶6盒,B种茶叶5盒,则共需要1200元.

(1)AB两种茶叶每盒的进价分别是多少元?

(2)该商场采购了AB两种茶叶共500盒.若A种茶叶的标价是进价的2倍,每盒B种茶叶按标价出售可获得利润180元.“五一”期间,商场对这两种茶叶进行优惠促销活动:A种茶叶每盒降价40元,B种茶叶打八折出售.将这500盒茶叶卖完后,总利润不低于40000元,求至少需要采购B种茶叶多少盒?

18.某中学科技社团准备还原物理课堂上的光的折射实验,选择一水槽进行,具体的操作步骤如下.

【实验操作】将长方体水槽放置在水平桌面上,一束光线从水槽边沿C处射入到水槽底部B处.向水槽注水,水面上升到AC边的E处时,停止注水.(直线MN为法线,CO为入射光线,OD为折射光线)

【测量数据】如图,所有点都在同一平面内,测得∠C=53°,BD=14cm,∠BOD=16°.(参考数据:sin53°≈0.8,sin37°≈0.6,tan37°≈0.75)

【数据应用】

(1)求折射角∠DON的度数;

(2)求水面的高度AE

五、(本大题共2小题,每小题10分,满分20分)

19.如图,在△ABC中,ABAC,以AB为直径作O.交BC于点D,DEO的切线且交AC于点E.延长CAO于点F,半径r=2,连接BF

(1)求证:BF=2DE

(2)若,求AE的长.

20.为提升阅卷效率与公平性,某校在一次数学模拟测试后,采用AI智能批改+人工复核的方式对试卷进行评阅.工作人员随机抽取了部分试卷,对AI批改的得分情况进行统计,绘制了如下尚不完整的统计图表:

得分段(分)

频数

频率

0~36

10

0.05

37~72

30

a

73~108

b

0.55

109~150

50

c

请根据图表信息解答下列问题:

(1)这次抽样调查的样本容量是 ,表中a ,b ;

(2)若该校共有1200名学生参加测试,估计此次测试AI评分在73分及以上的学生人数;

(3)现有4份经AI批改后的试卷,其中2份需要人工复核,另外2份无需复核.老师从中随机抽取2份试卷,求恰好抽到1份需要复核、1份无需复核的概率.

六、(本题满分12分)

21.项目主题:基于正多边形镶嵌原理的校园地面铺装设计.

项目准备:(1)正n边形内角和度数;

(2)平面镶嵌的核心条件,拼接在同一点的几个角的和恰好等于360°(周角).

项目情况:学校计划对校园广场地面进行翻新,需要用正多边形地砖进行无缝不重叠的平面镶嵌.(密铺)

项目任务:(1)初步探究:单一正多边形镶嵌.

等边三角形每个内角为_____,360°÷该内角=正整数,因此等边三角形可以单独镶嵌.

正五边形每个内角为_____,360°÷该内角≠正整数,因此正五边形不能单独镶嵌.

(2)实战应用:两种正多边形的组合镶嵌.学校计划用等边三角形和正六边形的两种地砖进行组合镶嵌,解决以下问题:

实验步骤;第一步:明确两种正多边形内角,等边三角形内角上面已知,正六边形内角为_____;第二步:建立镶嵌方程.

设在一个拼接点处,有m个等边三角形,n个正六边形(mn为正整数),则满足方程pm+qn=360°(p表示等边三角形的一个内角度数,q表示正六边形的一个内角度数),化简方程得:m+_____n=6,符合条件的正整数解为

项目实施:根据以上分析请将上述材料中横线上所缺内容补充完整.

(1) ; ;

(2) ; ; . .

七、(本题满分12分)

22.如图,长方形ABCD中,AB=3,BC=4,EBC边上一点,连接AE,过点EEFAECD边于点F.连接DEAF于点G

(1)当BECF=1时,求tan∠DEF的值;

(2)在(1)的条件下,求GF的长;

(3)若EFDF,求AGGF的值.

八、(木题满分14分)

23.已知抛物线y=﹣x2+bx+c经过点A(﹣1,0)和点B(3,0).

(1)求该抛物线的解析式.

(2)若该抛物线与y轴交于点C.连接BC,在抛物线BC段上有一动点D,连接ADBCE,求的最大值.

(3)若自变量x满足mxm+2(m≥0),此时函数的最大值为p,最小值为q,求wp+q的最大值.并求出此时m的值.

声明:试题解析著作权属菁优网所有,未经书面同意,不得复制发布日期:2026/5/5 7:24:15;用户:mczl58;邮箱:ldwh135@xyh.com;学号:24737059

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  1. CONNECT:[ UseTime:0.001416s ] mysql:host=127.0.0.1;port=3306;dbname=www_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.002457s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000755s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000686s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001395s ]
  6. SELECT * FROM `set` [ RunTime:0.000621s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001584s ]
  8. SELECT * FROM `article` WHERE `id` = 488548 LIMIT 1 [ RunTime:0.001152s ]
  9. UPDATE `article` SET `lasttime` = 1778121417 WHERE `id` = 488548 [ RunTime:0.007807s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000694s ]
  11. SELECT * FROM `article` WHERE `id` < 488548 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001113s ]
  12. SELECT * FROM `article` WHERE `id` > 488548 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001252s ]
  13. SELECT * FROM `article` WHERE `id` < 488548 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001727s ]
  14. SELECT * FROM `article` WHERE `id` < 488548 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002011s ]
  15. SELECT * FROM `article` WHERE `id` < 488548 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003945s ]
0.236163s