1 . 为打造旅游休闲城市,某村庄为吸引游客,沿绿道旁的母亲河边打造喷水景观(如图1).为保持绿道地面干燥,水柱呈抛物线状喷入母亲河中.图2是其截面图,已知绿道路面宽
米,河道坝高
米,坝面AB的坡比为
(其中
),当水柱离喷水口O处水平距离为2米时,离地平面距离的最大值为3米.
(1)求水柱所在抛物线的解析式;
(2)出于安全考虑,在河道的坝边A处安装护栏,若护栏高度为1.2米,判断水柱能否喷射到护栏上,说明理由;
(3)河中常年有水,但一年中河水离地平面的距离会随着天气的变化而变化,水柱落入水中能荡起美丽的水花,从美观角度考虑,水柱落水点要在水面上;
①河水离地平面
距离为多少时,刚好使水柱落在坝面截线
与水面截线的交点处?
②为保证水柱的落水点始终在水面上,决定安装可上下伸缩的喷水口,设坝中水面离地平面距离为h米,喷水口离地平面的最小高度m随着h的变化而变化,直接写出m与h的关系式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d257ee9c4cc6734d6133176abfc1404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc5df62e8ac9c74a46462519b95479a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9bbf35fe2349c32441815e225ef129f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cff3af2c91247039ef53ae46a88f0109.png)
(1)求水柱所在抛物线的解析式;
(2)出于安全考虑,在河道的坝边A处安装护栏,若护栏高度为1.2米,判断水柱能否喷射到护栏上,说明理由;
(3)河中常年有水,但一年中河水离地平面的距离会随着天气的变化而变化,水柱落入水中能荡起美丽的水花,从美观角度考虑,水柱落水点要在水面上;
①河水离地平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
②为保证水柱的落水点始终在水面上,决定安装可上下伸缩的喷水口,设坝中水面离地平面距离为h米,喷水口离地平面的最小高度m随着h的变化而变化,直接写出m与h的关系式.
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2 . 如图,在一个建筑物两侧搭两个长度相同的滑梯(即
),设计要求左、右两边的滑梯
,
的坡度分别为
和
.测得
米,
米.
(2)试猜想两个滑梯
,
的位置关系,并证明;
(3)小亮(看成点)
从点
沿滑梯
下滑,请直接 写出他与
处距离的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7da8fe8f5f8a3f17561d70652ad1172a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d65e051e943ab28fa57aee2fb57994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbe7344afd6e0ef8760c57bfaad647b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b515965c22d2950b592c096c6e3bdfd4.png)
(2)试猜想两个滑梯
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(3)小亮(看成点)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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7日内更新
|
47次组卷
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3卷引用:2024年河北省张家口市九年级中考三模数学试题
3 . 某数学实践小组测量某古塔
,如图,
是一个斜坡,坡面
的坡度为:
,在斜坡点C处测得塔顶A处的仰角为
,古塔
与水平地面
垂直,测得
米,
米,求古塔
的高.(结果精确到
米.已知点A、B、C、D都在一个平面中,参考数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09824eebae0979a2b6b1fcc4d04bdee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a53e3cd4566cc35d715806d5fca506db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432cce1481829c4dfe2bd557f6e9aa4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a87796ee30e6c5d5e6b6285b32abe10c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d92accf6e50007ee4b73b16487f78a.png)
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名校
4 . 位于海南省儋州市的东坡书院是全国重点文物保护单位,是苏轼谪居儋州时期的讲学场所.某校开展综合实践活动,小华借助一个斜坡测量书院内载酒亭的高度
,如图,坡长
米,坡角为
,在
处测得载酒亭顶端
的仰角为
,在
处测得载酒亭顶端
的仰角为
.(已知点
,
,
,
在同一平面内,
,
在同一水平线上)
______度;
______度;
(2)求点
到地面
的距离;
(3)求载酒亭的高度
(结果取整数).(参考数据:
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/386cda9f96731510d52ec18199e18286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802a939a9ab14a1a762a4275c9ec6899.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(3)求载酒亭的高度
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ed57cd3d54a8595cf9c3522b1048a7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a110ab2e0c3f3e2a58ca71dd097d1a9c.png)
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5 . 某村准备对水库一段长100m的堤坝进行改造.改造前,背水坡坡面
的坡比
,改造后坡面
的坡比变为
,坝顶加宽1m(
),已知原背水坡
的长为8m.
的长;
(2)求所需土石方的体积.(结果精确到
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bda3f0e79a7afecdb383130e90d1ee0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1927047743e116679805b3e4e04ddd29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce45af6971547fbd44000d3b6ad80d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(2)求所需土石方的体积.(结果精确到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c96862ee2bdd93527d05dbc2f96d54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52881be613aa404e553da30d8987cfad.png)
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6 . 周末清晨,小敏和父亲来到家附近的河堤散步,如图,梯形
是露在地上的河堤一部分,河堤的一侧有一棵树,小敏想测量这棵树的高度.她和爸爸查询资料得知,河堤两侧的坡度
,
.某一时刻,在太阳光的照射下,树的影子一部分落在地面
处,一部分落在斜坡
处,M刚好是
的中点,同时,小敏观察到此刻太阳光线与斜坡面
所在的直线平行,经测量坡面
米,
米,请你帮小敏求出树
的高度.(参考数据:
,结果保留整数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2a766b86c2e982d35ddc43af3b5cad1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02c57fb2508c49cad12a646fb83c4ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dae8221601c7bd5c51fd520615581fa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8a7ff6bb8000946da9599d7d903ac9a.png)
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7 . 如图① ,扬中塔(英语:
)又称扬中新广播电视发射塔,昵称扬中小蛮腰.位于扬中市滨江公园内,距离市区
,与镇江新区隔江相望,是扬中热门景点之一.
建在背水坡坡比为
,坡长
米,塔底B 距离C点10米的环岛江堤上,小明在距离D点275米的E处测得塔顶A的仰角为
,已知堤坝顶部
与地面
平行,求扬中塔
的高度(参考数据
,结果保留整数).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b96fe1c5290213aae82d47133e073b79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5656eaa3a8b00e2b10efe32eb537d5a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda42c22a8bace7f0c4a7d8e220592eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca7e1a727ba332984ad857b3d25344d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8a7ff6bb8000946da9599d7d903ac9a.png)
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名校
8 . 某数学小组在刘老师的指导下测量一建筑物高度,活动报告如下:
请结合以上信息完成步骤四:计算建筑物
的高度.(参考数据:
,
)
活动报告 | ||
活动目的 | 测量建筑物的高度 | |
活 动 过 程 | 步骤一:设计测量方案(小组讨论后,画出如图的测量示意图) | |
步骤二:准备测量工具 | 皮尺、测倾器 | |
步骤三:实地测量并记录数据(A,B,C,D在同一平面上,![]() | ①建筑物![]() ![]() ![]() ![]() ②在斜坡 ![]() ![]() ③斜坡 ![]() ④在点B测得建筑物顶点C的仰角为 ![]() | |
步骤四:计算建筑物![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7664a5f9b61fd010eda340986ca34b47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b519e336bb6346496d4c99a5a7a7e07b.png)
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9 . 如图,兰兰欲测量广场上某旗杆
的高度,她在该旗杆正前方的石坡顶
点处测得旗杆顶端
的仰角为
,在坡脚
点处测得旗杆顶端
的仰角为
,已知石坡高为3米,坡度
,求旗杆
的高度(其中点
在同一直线上).(结果精确到1米,
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efad20bd46a617d5eaf425eefa59f95f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2450156c6f081864f1efcf10af156e47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b8e238bec187c119aee3c485958aad8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba6f1168fac3f013f14c3f1f30beacb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a53027653e1c5530f2021728d4b82451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1acf457346c1f4e88d96493abd4dba.png)
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10 . 2024年5月,“嫦娥六号”突破月球逆行轨道设计与控制、月背智能采样和月背起飞上升等关键技术,实施月球背面自动采样返回,同时开展着陆区科学探测和国际合作,如图,在斜坡
上有一瞭望台,斜坡
的坡度为
,坡长
为50米,雷达
的高度为10米,火箭发射前,雷达中心
测得火箭底端
点的俯角为
,仅2秒的时间,测得火箭上升至的
处的仰角为
,请根据以上数据估算火箭发射时速度.(结果保留整数,参考数据:
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff32e75822e4e0c74edb122a11c66be2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b77d05a036c7d9f8a88d2b4e8c0eacf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f7ea2c2c4980db2bbf78bc0b740f4ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cf9e3617e413ec33a5344f5e13a3dd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dc9311533bca253a3c6f49388e5746c.png)
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