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【免费下载】精编天津外国语大学附属滨海外国语学校20222023学年九年级上学期第二次阶段练习数学试题

  • 2026-02-06 11:32:49
【免费下载】精编天津外国语大学附属滨海外国语学校20222023学年九年级上学期第二次阶段练习数学试题

n

(时间:50分钟分值:76分)

第Ⅰ卷

一、选择题(每小题3分,共30分,每题给出的四个选项中,只有一项是符合题目要求的)

1. 下列四个图案中,是中心对称图形的为(  )

A. B. C. D. 

2. 在一个不透明的袋中装着3个红球和1个黄球,它们只有颜色上的区别,随机从袋中摸出1个球,恰好是红球的概率为()

A. B. C. D. 

3. 把抛物线向上平移2个单位长度,则平移后抛物线解析式是(

A. B. C. D. 

4. 如图,线段两个端点坐标分别为,以原点O为位似中心,在第一象限内将线段扩大为原来的2倍后得到线段,则端点C的坐标为(

A. B. C. D. 

5. 如图,在中,分别是上的点,相交于,则下列结论一定正确的是(

A. B. C. D. 

6. 对于抛物线,下列结论正确的为(

A. 抛物线的开口向上B. 对称轴为直线

C. 顶点坐标为D. 时,增大而增大

7. 如图,如果,那么添加下列一个条件后,仍不能确定相似的是(  )

A. B. 

C. D. 

8. 如图,点E是△ABC的内心,AE的延长线和△ABC的外接圆相交于点D.连接BD,BE,CE,若∠CBD33°,则∠BEC=(  )

A. 66°B. 114°C. 123°D. 132°

9. 已知二次函数yax2-2ax+a2,当x≥2时,yx的增大而增大,且﹣2≤x≤5时,y的最大值为16,则a的值为(  )

A. -16B. C. 1D. 

10. 二次函数的部分图象如图所示,图象过点,对称轴为直线,下列结论:

④若点、点、点在该函数图象上,则

⑤若方程的两根为,且,则

其中正确的结论是(

A. ①③⑤B. ①④⑤C. ①②④D. ①⑤

第Ⅱ卷

二、填空题(每小题3分,共18分,请将最简答案填写在题中的横线上)

11. 如图所示,若圆心角,则圆周角大小为______

12. 如图,正六边形ABCDEF内接于⊙O,若AB=2,则⊙O的半径为____

13. 如图,直线,直线AB和直线DF分别与三条平行线相交.已知ACCB23,EF6,则DE______

14. 在桌面上放有四张背面完全一样卡片,卡片的正面分别标有数字4、﹣213,把四张卡片背面朝上,随机抽取两张,则两张卡片上的数字之和为正数的概率是________

15. 如图,矩形ABCD中,AB=4,AD=8,点E,F分别在边AD,BC上,且点B,F关于过点E的直线对称,如果EF与以CD为直径的圆恰好相切,那么AE=_______

16. 如图,是正方形内一点,,则______°.正方形的面积是______

三、解答题(解答题应写出演算步骤)

17. 已知x2是关于x的一元二次方程x2+3x+m20的一个根.求m的值及方程的另一个根.

18. 在刚刚结束的校运动会的实心球比赛中,小宇在决赛中,实心球所经过的路线是如图所示的抛物线的一部分.已知实心球出手处A距离地面的高度是米,当实心球运行的水平距离为4米时,达到最大高度5米的B处.小宇此次投掷的成绩是多少米?

19. O中,AB直径,CO上一点.

1)如图,过点CO的切线,与AB的延长线相交于点P,若∠CAB32°,求∠P的大小;

2)如图②,D为优弧ADC上一点,且DO的延长线经过AC的中点E,连接DCAB相交于点P,若∠CAB16°,求∠DPA的大小.

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  123. /yingpanguazai/ssd/ssd1/www/yeyulingfeng.com/vendor/topthink/think-orm/src/db/concern/Transaction.php ( 2.77 KB )
  124. /yingpanguazai/ssd/ssd1/www/yeyulingfeng.com/vendor/topthink/framework/src/think/log/driver/File.php ( 5.96 KB )
  125. /yingpanguazai/ssd/ssd1/www/yeyulingfeng.com/vendor/topthink/framework/src/think/contract/LogHandlerInterface.php ( 0.86 KB )
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  1. CONNECT:[ UseTime:0.000396s ] mysql:host=127.0.0.1;port=3306;dbname=no_yeyulingfeng;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000837s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.012414s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.026030s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000602s ]
  6. SELECT * FROM `set` [ RunTime:0.002249s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000690s ]
  8. SELECT * FROM `article` WHERE `id` = 466929 LIMIT 1 [ RunTime:0.058775s ]
  9. UPDATE `article` SET `lasttime` = 1770354198 WHERE `id` = 466929 [ RunTime:0.010551s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.002411s ]
  11. SELECT * FROM `article` WHERE `id` < 466929 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000670s ]
  12. SELECT * FROM `article` WHERE `id` > 466929 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001552s ]
  13. SELECT * FROM `article` WHERE `id` < 466929 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.050979s ]
  14. SELECT * FROM `article` WHERE `id` < 466929 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.015005s ]
  15. SELECT * FROM `article` WHERE `id` < 466929 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.029683s ]
0.349956s