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【免费下载】精编安徽省阜阳市颍州区颍南中学20212022学年八年级下学期月考数学试题

  • 2026-02-20 22:08:46
【免费下载】精编安徽省阜阳市颍州区颍南中学20212022学年八年级下学期月考数学试题

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20212022学年度八年级(下)阶段考试数学试题

注意事项:

1.你拿到的试卷满分为150分,考试时间为120分钟.

2.本试卷包括“试题卷”和“答题卷”两部分.“试题卷”共4页,“答题卷”共6页.

3.请务必在“答题卷”上答题,在“试题卷”上答题是无效的.

4.考试结束后,请将“试题卷”和“答题卷”一并交回.

一、选择题(本大题共10小题,每小题4分,满分40分)每小题都给出ABCD四个选项,其中只有一个是符合题目要求的.

1. 在函数中,自变量x的取值范围是(

A. B. C. D. 

2. 中,,则

A36B. 72C. 90D. 108

3. 若平行四边形中两个内角的度数比为12,则其中较大的内角是(

A. B. C. D. 

4. y关于x的正比例函数,则a,b应满足的条件是(

A. B. C. D. 

5. 关于函数,下列结论成立的是(

A. 时,B. 时,

C. 图象必经过点D. 图象不经过第一象限

6. 的三边分别是,且满足,则的形状是(

A. 等腰三角形B. 直角三角形

C. 等腰直角三角形D. 等腰三角形或直角三角形

7. 把直线向上平移后得到直线,若直线经过点,且,则直线的解析式为(  )

A. B. C. D. 

8. 在同一平面直角坐标系中,函数的图象大致是(  )

A. B. C. D. 

9. 如图,点EFGH分别为四边形ABCD四边ABBCCDDA的中点,若ACBD则四边形EFGH为(

A. 平行四边形B. 菱形C. 矩形D. 正方形

10. 如图,直线x轴交于点B,与y轴交于点C,点,点D为线段BC的中点,点Py轴上的一个动点,连接,当的周长最小时,点P的坐标为(

A. B. C. D. 

二、填空题(本大题共4小题,每小题5分,满分20分)

11. 将正比例函数向下平移个单位长度,得到一次函数,则______

12. 如图,两个一次函数图象的交点坐标为,则关于x,y的方程组的解为______

13. 如图,都是直角三角形,点O的中点.若,则______

14. 已知平面直角坐标中有直线

1)该直线恒过一定点,则该点的坐标是______

2)若平面直角坐标系中有三点,该直线将分成面积相等的两部分,则k的值是______

三、(本大题共2小题,每小题8分,满分16分)

15. 若一次函数的图象经过两点,求a的值.

16. 已知y关于x的一次函数.

(1)求k的值;

(2)若点在这个一次函数的图象上,求m的值.

四、(本大题共2小题,每小题8分,满分16分)

17. 如图,一次函数的图象经过AB两点.

(1)求此一次函数的解析式;

(2)结合函数图象,直接写出关于x的不等式的解集.

18. 小明在游乐场坐过山车,某一分钟内过山车高度与时间之间的函数图象如图所示.请结合图象回答:

(1)过山车所达到的最大高度是______m

(2)时,h的值是多少?并说明它的实际意义;

(3)请描述30s后,高度随时间的变化情况.

五、(本大题共2小题.每小题10分,满分20分)

19. 如图,l1反映了某公司销售收入与销售量的关系,l2反映了该公司产品的销售成本与销售量的关系.

(1)分别求出l1,l2对应的函数表达式;

(2)若公司要实现10000元的盈利,需售出多少产品?

20. 如图,在平行四边形中,点E,F分别在边上,相交于点O,连接

(1)求证:四边形菱形;

(2)若平行四边形的周长为,求的长.

六、(本题满分12分)

21. 新春佳节来临,某公司组织辆汽车装运苹果、芦柑、香梨三种水果共吨去外地销售,要求辆汽车全部装满,每辆汽车只能装运同一种水果,且装运每种水果的车辆都不少于辆,根据下表提供的信息,解答以下问题:

苹果

芦柑

香梨

每辆汽车载货量(吨)

7

6

5

每吨水果获利(万元)

0.15

0.2

0.1

(1)设装运苹果的车辆为辆,装运芦柑的车辆为辆,求之间的函数关系式,并直接写出的取值范围.

(2)来表示销售获得的利润,那么怎样安排车辆能使此次销售获利最大?并求出的最大值.

七、(本题满分12分)

22. 如图,已知直线与坐标轴交于A,两点,直线与坐标轴交于两点,两直线交点为

(1)k,a,b的值;

(2)连接OM,试说明.(S表示面积)

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  1. CONNECT:[ UseTime:0.000562s ] mysql:host=127.0.0.1;port=3306;dbname=no_yeyulingfeng;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000733s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000284s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000271s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000500s ]
  6. SELECT * FROM `set` [ RunTime:0.000207s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000531s ]
  8. SELECT * FROM `article` WHERE `id` = 469369 LIMIT 1 [ RunTime:0.000490s ]
  9. UPDATE `article` SET `lasttime` = 1771634829 WHERE `id` = 469369 [ RunTime:0.008395s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000239s ]
  11. SELECT * FROM `article` WHERE `id` < 469369 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000511s ]
  12. SELECT * FROM `article` WHERE `id` > 469369 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.004240s ]
  13. SELECT * FROM `article` WHERE `id` < 469369 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.004626s ]
  14. SELECT * FROM `article` WHERE `id` < 469369 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000837s ]
  15. SELECT * FROM `article` WHERE `id` < 469369 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000644s ]
0.112426s