1 . 请仔细阅读下面的材料,并完成相应的任务.
数学兴趣课上,老师和同学们共同探讨了下面的问题:已知矩形
,利用尺规作一个菱形,使菱形的四个顶点在矩形的边上.
勤奋组的方法为:如图1,做线段
的垂直平分线,交
于点
,做
的垂直平分线,分别交
于点
,顺次连接
,则四边形
是菱形.
善思小组分享的方法是:如图2,分别以
为圆心,
长为半径作弧,交
于点
,连接
,则点
与点
重合,点
于点
重合时,四边形
是特殊的菱形.
任务:
(1)证明勤奋组的作法正确;
(2)分别在图3和图4的平行四边形中用不同于材料中的方法作菱形,要求尺规作图,保留作图痕迹,顶点在原四边形的边上.
数学兴趣课上,老师和同学们共同探讨了下面的问题:已知矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
勤奋组的方法为:如图1,做线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c4cd264c97c1f261229925cc5a6761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52041559f8fee18bfa3e2e2ac07c3bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d93949d8a15aca4e79cedb978590571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5074a0dd822a9fda46c38825a64b9622.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42c2d86d8daea5e652d99fe1c6bc3f9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/23/8632f51c-6de3-4c5f-8bf5-125bdc79b8ba.png?resizew=352)
善思小组分享的方法是:如图2,分别以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d93949d8a15aca4e79cedb978590571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df4b833fb7dd03c34ac40c664cd8483d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b39addc1173a458af87ed5c5e3f06466.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
任务:
(1)证明勤奋组的作法正确;
(2)分别在图3和图4的平行四边形中用不同于材料中的方法作菱形,要求尺规作图,保留作图痕迹,顶点在原四边形的边上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/23/98fb9d40-2f3b-4b3d-98d6-9262f5931e69.png?resizew=371)
您最近一年使用:0次
名校
2 . 随着智慧校园的建设和推动,人脸识别系统被广泛应用于各学校,记录师生的入校时间,仪表检查,实现多效功能;如图①是一款人脸识别终端,图②是其侧面示意图,其中
为底座,撑板
,屏幕
,底座与撑板的夹角
,屏幕
可绕点
旋转.当撑板与屏幕的夹角
时,求点
到底座
的距离.(结果精确到
.参考数据:
,
,
,
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc8e179e706445f36305dda00cd8a98d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/575ce80585504f708265448db018144e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cec69d43f611d65d9b0dc642a83f12ab.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/481ff13b7bb5479c963b614f0dfa17b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dd58f9f2603b2a02db40ca2bf9d17a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa1e035d4de6360483215b4fbacc8398.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52483f9b35d126b9ec03b50c917d6889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe0d6a58c217d27d8b4261d0e72cdd7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b9da385bd721f9341ad900abf0b6d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4f1f3b8fbd57bbf30f4547571bb833d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26e9d20f7cc32e430b0e6a3ff116f766.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/24/a2fa0972-b95b-427d-85bd-64e2bcad47e1.jpg?resizew=341)
您最近一年使用:0次
3 . 如图,在平面直角坐标系中,点
为坐标原点,菱形
的顶点
正好在反比例函数
的图象上,点
的坐标为
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad42625f296d2a4b65180e2f7b776beb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
A.12 | B.16 | C.24 | D.32 |
您最近一年使用:0次
2023-06-12更新
|
219次组卷
|
3卷引用:2023年山西省吕梁市孝义市中考三模数学试题
4 . 图
是某小区门口的车辆自动识别系统,主要有可旋转高清摄像机和其下方固定的显示屏
图
是其结构示意图,摄像机长
,点
是摄像机旋转轴心,
为
的中点,显示屏的上沿
与
平行,
,
的连接杆为
,
,
,
,点
到地面的距离为
,若
与水平地面所成的角的度数为
请根据以上数据求镜头
到地面的距离.
参考数据:
,
,
,结果保留一位小数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/739c4d0dc2cac3bfd94a87f1d0d0633b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efeac524f12d236f4a0e1ff9c8d0123f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/178e3fa2e4de57a4c067e79be7d798e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/011205e7d4a723d966bff30912b43643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/795e740cb57615d48c36b416d5b93a9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9871f2a312aaf3a19b40e4fb1a7693b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a13ececd52896c5cb390368d6bf81aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a49743c3433d9e3d95f5cc0bb87b0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3935dc13ab225c9806bef648010c996.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02ee7ea1f83aac6b530fc2178ce89f56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/9/ea41cba6-0fc3-4ded-9531-2137a6bf66aa.png?resizew=291)
您最近一年使用:0次
5 . 如图,某数学活动小组要测量建筑物
的高度,他们借助测角仪和皮尺进行了实地测量,测量结果如下表:
请根据表格中测量数据,计算出建筑物
的高度.
(结果精确到
.参考数据:
,
,
,
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
测量项目 | 测量数据 |
测角仪到地面的距离 | ![]() |
从![]() ![]() | ![]() |
从![]() ![]() | ![]() |
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/30/a7e04d62-6cfb-40f7-9269-4ac93a76dc57.png?resizew=143)
请根据表格中测量数据,计算出建筑物
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(结果精确到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfaa19eeaf415ed419e77fe92794f443.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d69b57ac28710f1d8c476d6397bf2ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81c72acfa57b049df39e815e424a2763.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aec9fc9ccda1041af9901a4bcf6df4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28ea3c7e6efd548ecc3baed26c8b6c78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134b920d0b80633788ae8fae2029d60c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03fe962af64f2c60c4a902b0e636f637.png)
您最近一年使用:0次
6 . “植草沟”是指种有植被的地表浅沟,它可以通过种植的植被、过滤层等对雨水进行收集、输送、排放与净化.图2是某校“综合实践”小组的同学为某公园设计的植草沟示意图,该图为轴对称图形.种植植被的坡面
cm,
与
的坡度(铅直高度与水平宽度的比)
,种植土的上下表层
和
均与水平线
平行,并且
,
与
之间的距离为32cm.其中
,
.请你根据以上信息,求种植土底层斜坡
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b714678756843f5e848b615cfca19bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4dd80daefa23a61d300a829f77bbfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7dab0c0c0f988903f228a6510208420.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d1e11050f9706a5d2730eff38b0971c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6afc0849dd77c55cc338a4fbfec8def1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2023/5/21/3242762524459008/3244133922340864/STEM/aab695f0f64d453fa4bc2d0aaf1f3ea4.png?resizew=392)
您最近一年使用:0次
7 . 太原汾河四期工程北起尖草坪区上兰村汾河漫水桥(中北大学往南约
米),南至柴村桥北
米处.太原汾河四期的建成,成为市民节假日热门打卡之地.小明和小聪相约游览,他们利用无人机和所学的数学知识对某段河流的宽度
进行了测量.如图所示,小明站在河岸
处测得无人机
的仰角为
,小聪站在小明对面河岸
处测得无人机
的仰角为
,已知小明的身高
,小聪的身高
,无人机
距地面的高度为
(点
,
,
,
,
在同一个平面内).求河流的宽度
.(精确到
。参考数据:
,
,
)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/14/61a88d13-49b5-4622-8595-bf8951411775.png?resizew=261)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98ac61206cb12cf6686bb0facf635010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/821b8672d030c240ff230a0174aa7a3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1845ed03ec08feac9adee161aab3449.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/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec692d0fed789a952522902815d541b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf2088d6fd1c5288253e927aa19b01d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a03a3794106382223ec07ffd8ab91a22.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfaa19eeaf415ed419e77fe92794f443.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a49743c3433d9e3d95f5cc0bb87b0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3935dc13ab225c9806bef648010c996.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75e9eaaeea5ab63e69cbc31e488d2cda.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/14/61a88d13-49b5-4622-8595-bf8951411775.png?resizew=261)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/14/d70fbad8-5297-4628-9905-7e3a02534eb5.png?resizew=190)
您最近一年使用:0次
8 . 如图,在等腰
中,
,
,直线
经过点
,过点
作
于点
,过点
作
于点
,点
为
延长线上一点,且
,点
为
的中点,连接
,若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96cf3f9a01a810792ebacc7f5bc70e97.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.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/5c1c122603b60b6f1a1334ddb56c3fb7.png)
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9 . 近年来,随着智能技术的发展,智能机器人已经服务于社会生活的各个方面.图1所示是一款智能送货机器人,图2是其侧面示意图,现测得其矩形底座
的高
为
,上部显示屏
的长度为
,侧面支架
的长度为
,
,
,则该机器人的最高点
距地面
的高度约为________
.(参考数据:
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3668a3f3ce5b8a272ad92c2ebd233f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e651babde701d43faadf589dd4e14c72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66a82c983e0a00f251626340df95a1ef.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/19/1315ef17-5eae-4646-9e64-5787ce4b5f7a.png?resizew=241)
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10 . 小明参加了今年社区组织的义务植树活动,活动结束后,他发现对面斜坡的平台上有一棵与地面垂直的树
,他想运用课上学到的相关知识测量这棵树的高度.测量过程如下:如示意图,在点
处测得树顶端
的仰角为
,先沿着斜坡
行走13米至坡顶
处,再沿水平方向行走3米到达树底点
处(点
,
,
,
在同一平面内).已知斜坡
的坡比为
,则他测得树
的高度为___________ 米.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/20/b8ada9e8-ca98-474c-8731-9acfacb7ae38.png?resizew=184)
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