名校
1 . 已知二次函数
经过点
,对称轴为直线
,A、E两点在函数图象上,其横坐标分别为
,
(n为常数),抛物线在A、E两点之间的部分记为图象G(包括边界).
(1)求二次函数的解析式.
(2)当图象G中,y随x的增大而减小时,求n的取值范围.
(3)若图象G中最大值与最小值的差为1,求n的值.
(4)点B与点A关于原点对称,以
为对角线作矩形
,且边垂直于坐标轴,当
,图象G在矩形内部(包括边界)的最高点为P,右侧的最低点为Q,当P到直线
的距离等于Q到y轴的距离时,直接写出n的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/415ce7008a89ffca8c3c3edbf13a935e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcbcd0aebdd8bd688d108834747009f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef00713e73b8357cc7900144f5505bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aadf9ab510510120699c5eee39ab18b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0697eefffcdeb48b94e061a6f49914bc.png)
(1)求二次函数的解析式.
(2)当图象G中,y随x的增大而减小时,求n的取值范围.
(3)若图象G中最大值与最小值的差为1,求n的值.
(4)点B与点A关于原点对称,以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c593ebdb2f1934a0cb56f8c44f454f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/105e2bc388f99923f7bda91923e0955a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0434ca069f67851b640e83a414d39165.png)
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2 . 如图,在
中,
,
,
,动点
从点
出发,沿折线
向点
运动,点
在
上的速度为每秒1个单位长度,在
上的速度为每秒
个单位长度,过点
作
交折线
于点
,以点
为旋转点,将线段
绕点
顺时针旋转
得到线段
,连接
.当
与
重叠部分图形是三角形时,设三角形的面积为
(平方单位),点
的运动时间为
(秒).
(1)当
时,求
的长.
(2)求
关于
的函数解析式.
(3)当
与
重叠部分图形是轴对称图形时,直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d768ffd5bf75080e8ff5ce6b472c0cc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05d35d8d8bb0dc17f2f86fe5b230a2b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/778cdfe7346279f9695a745fb780e806.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04fb30a9d07e410ac92c34b8ad0133db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92f602a637e57761b115810931ae8e89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c2293f93791a597bf0162411f3395f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b51d3992644d37dc71c9b5a97d515c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/1/de4e58b9-da32-4b7c-9a86-a5b5b8572820.png?resizew=170)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b51d3992644d37dc71c9b5a97d515c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
名校
3 . 在平面直角坐标系中,抛物线
(
为常数)经过点
,点
在抛物线上,其横坐标为
,将此抛物线上
、
两点间的部分(包括
、
两点)记为图像
.
(1)求此抛物线的解析式;
(2)当
时,求图像
的最高点与最低点纵坐标的差;
(3)当图像
与直线
有一个交点时,求
的取值范围;
(4)已知点
,
,
,顺次连结
、
、
、
得到矩形
,当图形
与该矩形的边有两个公共点时,直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5c1be55ce3ff86ba89cb1c84dc88ed9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b07bddd9bebc06909947a3f429ce3348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
(1)求此抛物线的解析式;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc895959e9bc92294dc9dd2263dbf0c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
(3)当图像
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08d162b5ae6efc4631abbee6a88ed87d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(4)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b2c83ee663540ac12582d9890709ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d7a2c29d29b348b27810b920dd50a87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d94b7cf643c7c94cc6139098dba545a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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4 . 如图,在平面直角坐标系中,O为坐标原点,抛物线
与x轴的一个交点为
,与y轴的交点为
.点P为该抛物线上的点,横坐标为m.点P关于y轴对称的点为点Q,分别过点P、Q向x轴作垂线,垂足分别为N、M.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/24/4a5f5bb6-d798-4f8d-837c-f98ed07d0892.png?resizew=168)
(1)求该抛物线的解析式;
(2)当抛物线在矩形
内的部分所对应的函数值y随x的增大而减小时,求m的取值范围;
(3)当点P在x轴下方,且矩形
为正方形时,求m的值;
(4)当矩形
的边与抛物线有三个交点时,直接写出m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f2b1f4120365cb6ee4925fe417563f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33accbbbde2d8e87780401f5b9c88c3a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/24/4a5f5bb6-d798-4f8d-837c-f98ed07d0892.png?resizew=168)
(1)求该抛物线的解析式;
(2)当抛物线在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ac79e422ba4876949f0514c44539b1.png)
(3)当点P在x轴下方,且矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ac79e422ba4876949f0514c44539b1.png)
(4)当矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ac79e422ba4876949f0514c44539b1.png)
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5 . 如图,正方形
的边长为12,E是
边上一点(与点B、C不重合),连接
,G是
延长线上的点,过点E作
的垂线交
的角平分线于点F,若
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/11/4b6fd612-a362-4a99-9738-d9a68cf27bf1.png?resizew=258)
(1)求证:
.
(2)若
,求
的面积.
(3)当
为何值时,
的面积最大,最大值是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af342d3b871ace448ccc7c648528288.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f32da4cdd5d15010b3599c86e259405d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/11/4b6fd612-a362-4a99-9738-d9a68cf27bf1.png?resizew=258)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ce4468a7edda8dd25fc31e3ba633a1c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56947d72d9b0b0e8d2a435ce57b2d84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
您最近一年使用:0次
6 . 如图,用长为
的篱笆,一边利用墙(墙足够长)围成一个长方形花园,设花园的宽
为
,围成的花园面积为
,则y关于x的函数表达式为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbe9f7abf7bcf4e1aa2579cd191d7761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee3160fce05b551569b8c7b5de6dd8b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d740004cfdade4c185f722dadc27e15.png)
您最近一年使用:0次
2023-07-14更新
|
193次组卷
|
5卷引用:吉林省吉林市龙潭区亚桥第二九年制学校2022-2023学年九年级上学期期中数学试题
吉林省吉林市龙潭区亚桥第二九年制学校2022-2023学年九年级上学期期中数学试题吉林省长春市德惠市2023-2024学年九年级上学期期末数学试题广东省江门市开平市忠源纪念中学2022-2023学年九年级上学期11月期中数学试题第26章 二次函数 26.3 实践与探索华东师大版(2012)九年级下册课前预习(已下线)专题05用二次函数解决问题(3个知识点4种题型3个中考考点)-【帮课堂】2023-2024学年九年级数学下册同步学与练(苏科版)
7 . 用长为6米的铝合金型材做一个形状如图所示的矩形窗框,设矩形窗框的宽为
米,窗框的透光面积为
平方米.(铝合金型材宽度不计)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/24/1b205d5f-45a1-4a56-ac6e-2869626b37f7.png?resizew=116)
(1)求
与
的函数关系式,并写出
的取值范围.
(2)直接写出
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/24/1b205d5f-45a1-4a56-ac6e-2869626b37f7.png?resizew=116)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
您最近一年使用:0次
名校
8 . 如图,在正方形
中,
,延长
至
,使
.以
、
为邻边作
.动点
从点
出发,以每秒2个单位的速度沿
向终点
运动,过点
作
交
或
的延长线于点
,以
为边向右作正方形
.设正方形
与
的重叠部分的面积为
,点
运动的时间为
(
,单位:秒).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/23/65c936e8-d62a-40b9-8cf7-901a8eed5516.png?resizew=314)
(1)用含
的代数式表示线段
为______;
(2)当点
与点
重合时,求
的值;
(3)当正方形
与
的重叠部分不是正方形时,用含
的代数式表示
;
(4)当
或
是锐角三角形时,直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3699139ef137f5053d121cd22a653ebe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abbd75f5e846f0c89bcde1ff44a03a36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3533837e3d08c461dea031a44e5424d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c6f359362fa8af71be3517336ff5863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
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(1)用含
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(2)当点
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(3)当正方形
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(4)当
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9 . 某抛物线形隧道的最大高度为16米,跨度为40米,按如图所示的方式建立平面直角坐标系,它对应的表达式为___________ .
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/12/2ef66374-6992-4ad8-8adc-92a3fd3ddcf7.png?resizew=152)
您最近一年使用:0次
2023-09-20更新
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161次组卷
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5卷引用:2021年吉林省长春市绿园区中考一模数学试题
2021年吉林省长春市绿园区中考一模数学试题安徽省合肥市瑶海区三十八中分校2023-2024学年九年级上学期月考数学试题安徽省合肥市第三十八中学北校2023-2024学年九年级上学期月考数学试题(已下线)安徽省合肥市第三十八中学新校2023-2024学年九年级上学期第一次月考数学试题安徽省合肥市第三十八中分校2023-2024学年九年级上学期月考模拟数学试题
10 . 康康发现超市里有一种长方体包装的果冻礼盒,四个果冻连续放置(如图2).每个果冻高为6cm,底面直径为4cm,其轴截面的轮廓可近似地看作一段抛物线,如图1所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/24/79f6b1e8-b806-491a-8d46-abd03fa06114.png?resizew=345)
(1)在图2中建立合适的平面直角坐标系,并求出左侧第一条抛物线的函数表达式.
(2)为了节省包装成本,康康设计了一种新的包装方案:将相邻的果冻上下颠倒放置(相邻果冻紧贴于一点,但果冻之间无挤压),如图3所示.
①康康发现相邻两条紧贴于一点的抛物线成中心对称.请在你建立的坐标系中,求左侧两条抛物线的对称中心的坐标.
②按照康康的方案,包装盒的长度节省了多少厘米?
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/24/79f6b1e8-b806-491a-8d46-abd03fa06114.png?resizew=345)
(1)在图2中建立合适的平面直角坐标系,并求出左侧第一条抛物线的函数表达式.
(2)为了节省包装成本,康康设计了一种新的包装方案:将相邻的果冻上下颠倒放置(相邻果冻紧贴于一点,但果冻之间无挤压),如图3所示.
①康康发现相邻两条紧贴于一点的抛物线成中心对称.请在你建立的坐标系中,求左侧两条抛物线的对称中心的坐标.
②按照康康的方案,包装盒的长度节省了多少厘米?
您最近一年使用:0次
2023-03-20更新
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104次组卷
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2卷引用:吉林省白山市抚松县2022-2023学年九年级上学期期末数学试题