2023九年级下·江苏·专题练习
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1 . 如图,某学校拟建一块矩形花圃,打算一边利用学校现有的墙(墙足够长),其余三边除门外用栅栏围成,栅栏总长度为50m,门宽为2m.这个矩形花圃的最大面积是( )
![](https://img.xkw.com/dksih/QBM/2022/12/18/3133348762083328/3139807457624064/STEM/c41fdb411a89439abd467ffb278a24b2.png?resizew=186)
![](https://img.xkw.com/dksih/QBM/2022/12/18/3133348762083328/3139807457624064/STEM/c41fdb411a89439abd467ffb278a24b2.png?resizew=186)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 如图,在菱形
中,
,
,矩形
的四个顶点分别在菱形的四边上,则矩形
的最大面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/17/c1866af6-dfa5-4cae-861a-bf28daf20a7e.png?resizew=182)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17cb7a12bb8797615303fc20adb9f988.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cec780e86f57790cf88ec761e219bf5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/17/c1866af6-dfa5-4cae-861a-bf28daf20a7e.png?resizew=182)
A.![]() | B.![]() | C.![]() | D.![]() |
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2023-05-15更新
|
118次组卷
|
2卷引用:鲁教版(五四制)数学九年级上册第三章 二次函数单元检测
名校
3 . 如图,抛物线
与抛物线
交于点
,且分别与
轴交于点
,
.过点
作
轴的平行线,分别交两条抛物线于点
,
,则以下结论:①无论
取何值,
恒小于0:②将
向右平移3个单位长度,再向下平移3个单位长度得到
;③当
时,随着
的增大,
的值先增大后减小;④四边形
的面积为18.其中正确的结论有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cada4ff35c9d5d0fdec38c74b26257ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afbca915307f725499eba9c496b6180c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e5c320d78ef38e330176c335cc58e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0de82aff5049dce8a3d56291dc2ae4af.png)
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A.1个 | B.2个 | C.3个 | D.4个 |
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2023-04-24更新
|
369次组卷
|
6卷引用:河北省石家庄市第二十八中学2022-2023学年九年级上学期期末考试数学试题
河北省石家庄市第二十八中学2022-2023学年九年级上学期期末考试数学试题(已下线)数学(济南卷)-学易金卷:2023年中考第一次模拟考试卷(已下线)黄金卷04(德州专用)-【赢在中考·黄金8卷】备战2023年中考数学全真模拟卷2023年山东省烟台地区中考一模数学试题2023年湖南省衡阳市第十五中学中考模拟数学试题2024年四川省资阳市雁江区保和中学中考模拟考试数学试题(二)
4 . 如图,用一段长为30米的篱笆围成一个一边靠墙(墙的长度不限)的矩形菜园ABCD,设AB边长为x米,BC的长y米,菜园的面积为S(单位:平方米).当x在一定范围内变化时,y和S都随x的变化而变化,则y与x,S与x满足的函数关系分别是()
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/10/b9e2ad66-cd63-436b-92a3-0d647a9146c0.png?resizew=190)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/10/b9e2ad66-cd63-436b-92a3-0d647a9146c0.png?resizew=190)
A.一次函数关系,二次函数关系 | B.二次函数关系,一次函数关系 |
C.二次函数关系,二次函数关系 | D.一次函数关系,一次函数关系 |
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5 . 如图,点E为矩形ABCD边AD上一点,点P、点Q同时从点B出发,点P沿BE→ED→DC运动到点C停止,点Q沿BC运动到点C停止,它们运动的速度都是1cm/s,设P、Q出发t秒时,△BPQ的面积为y cm,已知y与t的函数关系式(如图所示,曲线OM为抛物线的一部分),则下列结论错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/8/192fb47e-bafb-4001-a02e-4f09e97431b1.png?resizew=169)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/8/4fb06a99-35ab-4be8-ae49-2f4982736f5c.png?resizew=151)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/8/192fb47e-bafb-4001-a02e-4f09e97431b1.png?resizew=169)
A.![]() ![]() | B.当![]() ![]() ![]() |
C.直线NH的解析式为![]() | D.![]() |
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6 . 如图,晓波家的院墙一边靠墙处,用
米长的铁栅栏围成了三个相连的养殖小院子,总面积为
平方米,为方便喂养这些不同类的动物,在各个养殖院子之间留出了
米宽的缺口作通道,在平行于墙的一边留下一个
米宽的缺口作小门.若设
米,则
关于
的函数关系式为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/2c277d70-6a3a-4e0c-9c2c-082c7e8364a3.png?resizew=164)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b3779b4ea5477aebfe85113b0de1d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c7a3d679b4dae63575903387a76ce45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/2c277d70-6a3a-4e0c-9c2c-082c7e8364a3.png?resizew=164)
A.![]() | B.![]() |
C.![]() | D.![]() |
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7 . 已知抛物线
与直线
交于点
,
,点
是抛物线上
,
之间的一个动点,过点
分别作
轴、
轴的平行线与直线
交于点
,
.以
,
为边构造矩形
,设点
的坐标为
,则
,
之间的关系式是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/13/4583c820-64b4-4ab0-846b-209fc2909e3b.png?resizew=131)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c44f12ece8a44b5943afbec664e7d40e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b9f0b9e53a83e68f5fec944f343119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19b62194097ac66a5093c57fca2f5b4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c566603694f47b1ff6d2cf6c4abb5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba7204f43679af6935e494c59d40c6ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/13/4583c820-64b4-4ab0-846b-209fc2909e3b.png?resizew=131)
A.![]() | B.![]() |
C.![]() | D.![]() |
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8 . 如图,已知抛物线
与轴交于A、B两点,顶点C的纵坐标为
,现将抛物线向右平移2个单位,得到抛物线
,则下列结论:①
;②
;③阴影部分的面积为4;④若
,则
.正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/6/efbccace-714a-4da0-9649-57d1ee86410c.png?resizew=169)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047c96a12dfa8588b920c7e109c05efd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3a915c1a8a9304aeb307d130faaeb15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f3893badb238dd11cfd88f87dffe425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4580cc037c0c760c728cdbb74a8154c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5962139b5dfc4061a2080fb4df4989f7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/6/efbccace-714a-4da0-9649-57d1ee86410c.png?resizew=169)
A.①③ | B.①② | C.①③④ | D.③④ |
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9 . “漏壶”是古代一种计时器,在它内部盛一定量的水,不考虑水量变化对压力的影响,水从壶底小孔均匀漏出,壶内壁有刻度.人们根据壶中水面的位置计算时间.在漏壶漏完水之前,漏壶内水的深度与对应的漏水时间满足的函数关系式( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/24/b7926f87-0e87-49c7-8b7e-86267e3830a5.png?resizew=84)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/24/b7926f87-0e87-49c7-8b7e-86267e3830a5.png?resizew=84)
A.正比例函数关系 | B.一次函数关系 |
C.反比例函数关系 | D.二次函数关系 |
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2023-01-20更新
|
138次组卷
|
3卷引用:广西壮族自治区南宁市第十三中学2022-2023学年九年级上学期第三次月考数学试题
广西壮族自治区南宁市第十三中学2022-2023学年九年级上学期第三次月考数学试题(已下线)黄金卷7-【赢在中考·黄金8卷】备战2023年中考数学全真模拟卷(北京专用)2023年安徽省六安市十校联盟中考模拟数学试卷
22-23九年级上·全国·单元测试
10 . 如图,将半径为
的半圆围成一个圆锥,在圆锥内接一个圆柱,当圆柱的侧面面积最大时,圆柱的底面半径是( )
![](https://img.xkw.com/dksih/QBM/2023/1/8/3148236866428928/3148951698489344/STEM/1490b54cebd045cd9315bb685f1e0b4c.png?resizew=236)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/095ab4a92bf822e175d370e6d0c8a730.png)
![](https://img.xkw.com/dksih/QBM/2023/1/8/3148236866428928/3148951698489344/STEM/1490b54cebd045cd9315bb685f1e0b4c.png?resizew=236)
A.![]() | B.![]() | C.1cm | D.![]() |
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