名校
解题方法
1 . 如图1所示,在边长为3的正方形
中,将
沿
折到
的位置,使得平面
平面
,得到图2所示的三棱锥
.点
分别在
上,且
,
,
.记平面
与平面
的交线为l.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/26/a232b33a-64b7-48ee-ad75-468ec615404d.png?resizew=335)
(1)在图2中画出交线l,保留作图痕迹,并写出画法.
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9524e3810e06dc781285f1289e75d653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1095b030f441de5fb223781b00f3dd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b199a99e53d67ff4abf233930961a29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19bb1063e139610045f3bca5ca0b2766.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715ef932b72eb703f3e7a17ee2ce6a7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1828795d52174dd64fba1c9ebe61072b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7cf0ee918f8c2f753302d3b5928d358.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/26/a232b33a-64b7-48ee-ad75-468ec615404d.png?resizew=335)
(1)在图2中画出交线l,保留作图痕迹,并写出画法.
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb7f9eca6d2aabe3f9e0f39b46106ce4.png)
您最近一年使用:0次
2023-04-25更新
|
509次组卷
|
3卷引用:贵州省凯里市第一中学2023届高三三模数学(理)试题
2 . 如图多面体ABCDEF中,面
面
,
为等边三角形,四边形ABCD为正方形,
,且
,H,G分别为CE,CD的中点.
;
(2)求平面BCEF与平面FGH所成角的余弦值;
(3)作平面FHG与平面ABCD的交线,记该交线与直线AD交点为P,写出
的值(不需要说明理由,保留作图痕迹).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1056cd2db035cbfcce4935ffec20030a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eaceb8d6c6927e14d9ac7a557a2b11d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee73452ee4d5437f1399f1235b95e55f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36896e2033dd49401aca07a4a1e1d267.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b9d0c688e55286443c9974797fc647f.png)
(2)求平面BCEF与平面FGH所成角的余弦值;
(3)作平面FHG与平面ABCD的交线,记该交线与直线AD交点为P,写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb5391d00655e9e4ee30fe9934b2f02c.png)
您最近一年使用:0次
名校
解题方法
3 . 如图为一块直四棱柱木料,其底面
满足:
,
.
![](https://img.xkw.com/dksih/QBM/2022/1/18/2897002878722048/2926845450665984/STEM/e965b444-13ae-43bd-b609-5f5bac543f48.png?resizew=156)
(1)要经过平面
内的一点
和棱
将木料锯开,在木料表面应该怎样画线?(借助尺规作图,并写出作图说明,无需证明)
(2)若
,
,当点
是矩形
的中心时,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://img.xkw.com/dksih/QBM/2022/1/18/2897002878722048/2926845450665984/STEM/e965b444-13ae-43bd-b609-5f5bac543f48.png?resizew=156)
(1)要经过平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c52091eb745de866044477641a7c55f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8745717601cd14b46c2298919b41b502.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1f9660760804ff01bbc9319b7342191.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b724168afaee2ecddf97257180be18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f96c341e13ce6cbbc5975f0ef53001.png)
您最近一年使用:0次
2022-03-01更新
|
589次组卷
|
4卷引用:吉林省吉林市2021-2022学年高三上学期第二次调研测试数学(文)试题
吉林省吉林市2021-2022学年高三上学期第二次调研测试数学(文)试题(已下线)重难点03 立体几何与空间向量-2022年高考数学【热点·重点·难点】专练(全国通用)河北省石家庄市十五中2021-2022学年高一下学期期中数学试题(已下线)专题08 立体几何解答题常考全归类(精讲精练)-1
19-20高二下·上海浦东新·阶段练习
名校
解题方法
4 . 正四棱锥
的底面正方形边长是3,
是在底面上的射影,
,
是
上的一点,过
且与
、
都平行的截面为五边形
.
![](https://img.xkw.com/dksih/QBM/2020/5/4/2455313146961920/2455679765872641/STEM/99c63537a094425cac0803ac5f8d88c6.png?resizew=157)
(1)在图中作出截面
,并写出作图过程;
(2)求该截面面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f091d853ef8f4133dfa73d7b9622cee6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30f48aa3096fb3db24874b1c6701a6ed.png)
![](https://img.xkw.com/dksih/QBM/2020/5/4/2455313146961920/2455679765872641/STEM/99c63537a094425cac0803ac5f8d88c6.png?resizew=157)
(1)在图中作出截面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30f48aa3096fb3db24874b1c6701a6ed.png)
(2)求该截面面积的最大值.
您最近一年使用:0次
2020-05-04更新
|
1293次组卷
|
6卷引用:2020届上海市高三高考压轴卷数学试题
2020届上海市高三高考压轴卷数学试题(已下线)上海市华东师范大学第二附属中学2019-2020学年高二下学期(4月)月考数学试题(已下线)重难点05 空间向量与立体几何-2021年高考数学【热点·重点·难点】专练(上海专用)(已下线)专题5.8 期末考前选做30题(解答题压轴版)-2020-2021学年高二数学下学期期末专项复习(沪教版)(已下线)第09讲 空间几何体的结构与直观图(核心考点讲与练)(1)(已下线)第四章 立体几何解题通法 专题一 降维法 微点1 降维法(一)【基础版】
解题方法
5 . 如图,已知多面体
的底面
是边长为2的正方形,
底面
,
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/26/bccf129a-24c0-494f-bedc-4121e322abcc.png?resizew=154)
(1)求多面体
的体积;
(2)记线段
的中点为
,在平面
内过点
作一条直线与平面
平行,要求保留作图痕迹,但不要求证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a325f7220b9d63033befaa589646e802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed04b01505bbd8a4ac0bc12e46f23bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e25befd6728421dcba71a40e0d5a5ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba1316f4183e8854d38283b716e2ba1b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/26/bccf129a-24c0-494f-bedc-4121e322abcc.png?resizew=154)
(1)求多面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a325f7220b9d63033befaa589646e802.png)
(2)记线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f636f76d550dfb593a25eb680cff556.png)
您最近一年使用:0次
解题方法
6 . 在四棱锥
中,
平面
,且底面
为边长为2的菱形,
,
.
(1)记
在平面
内的射影为
(即
平面
),试用作图的方法找出M点位置,并写出
的长(要求写出作图过程,并保留作图痕迹,不需证明过程和计算过程);
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/30/4d27cde3-f8e6-4443-85a2-eb3bd7168a7b.png?resizew=191)
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71a46dc0bb5d8fa33583817e530a5d21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cd5c4f8b106d01e0e431078e1a468b.png)
(1)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d0492b25f10ae45c39f8e9838519259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/30/4d27cde3-f8e6-4443-85a2-eb3bd7168a7b.png?resizew=191)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33b7213d99a817bff19bcf740a0697c.png)
您最近一年使用:0次
名校
解题方法
7 . 已知矩形
,其中
,
,点D沿着对角线
进行翻折,形成三棱锥
,如图所示,则下列说法正确的是__________ (填写序号即可).
①点D在翻折过程中存在
的情况;
②三棱锥
可以四个面都是直角三角形;
③点D在翻折过程中,三棱锥
的表面积不变;
④点D在翻折过程中,三棱锥
的外接球的体积不变.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c586b72a984e1fd9082b9f02ef7f3e91.png)
①点D在翻折过程中存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc9aabd9a42a97a1108149fafca8a919.png)
②三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c586b72a984e1fd9082b9f02ef7f3e91.png)
③点D在翻折过程中,三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c586b72a984e1fd9082b9f02ef7f3e91.png)
④点D在翻折过程中,三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c586b72a984e1fd9082b9f02ef7f3e91.png)
您最近一年使用:0次
2024-06-10更新
|
453次组卷
|
2卷引用:黑龙江省2024届高三信息押题卷(四)数学试卷
名校
解题方法
8 . 在棱长为1的正方体
中,
是侧面
内一点(含边界)则下列命题中正确的是(把所有正确命题的序号填写在横线上)______ .
①使
的点
有且只有2个;
②满足
的点
的轨迹是一条线段;
③满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
平面
的点
有无穷多个;
④不存在点
使四面体
是鳖臑(四个面都是直角三角形的四面体).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67e05241efa370017b863e6e0fe72bbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
①使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e7facb932529ae0d511d77714cf9e73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
②满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac117747fb221b7f976577c5fb824084.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
③满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a52848aff08399a36f217356007a4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
④不存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90671eb673c449b2b257ca23848f2f4c.png)
您最近一年使用:0次
2022-12-26更新
|
456次组卷
|
3卷引用:陕西省宝鸡市2023届高三上学期一模理科数学试题
名校
解题方法
9 . 如图,矩形
中,
,
为边
的中点,将
沿直线
翻折至
的位置.若
为线段
的中点,在
翻折过程中(
平面
),给出以下结论:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/14/75579b14-d042-4f3f-94ed-2310a0e41d23.png?resizew=198)
①存在
,使
;
②三棱锥
体积最大值为
;
③直线
平面
.
则其中正确结论的序号为_________ .(填写所有正确结论的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80f51c31583fea58fde645474d60b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa2a83fed9bf4cb09d84a980452e346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8588e18e27bfebf7c81c7e3c7efb1149.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/14/75579b14-d042-4f3f-94ed-2310a0e41d23.png?resizew=198)
①存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa2a83fed9bf4cb09d84a980452e346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2181c78134c310f746eab44b9124e63b.png)
②三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb79f948d408ab4fb6708bde172c5e5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11b9f96b8ecc3cb000bb2f030809f225.png)
③直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c70966a318ef8ecf874257f5c5e5db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/657dffbd3623b705f871878fbd9df57e.png)
则其中正确结论的序号为
您最近一年使用:0次
2023-03-13更新
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364次组卷
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3卷引用:宁夏六盘山高级中学2023届高三第一次模拟数学(文)试题
宁夏六盘山高级中学2023届高三第一次模拟数学(文)试题河南省许昌市鄢陵县职业教育中心(升学班)2022-2023学年高二下学期期中考试数学试题(已下线)第15讲 8.6.3平面与平面垂直(第2课时)-【帮课堂】(人教A版2019必修第二册)
19-20高一·浙江杭州·期末
名校
解题方法
10 . 如图,矩形
中,
,E为边
的中点,将
沿直线
翻折成
.若M为线段
的中点,则在
翻折过程中,下面四个选项中正确的是______ (填写所有的正确选项)
(1)
是定值
(2)点M在某个球面上运动
(3)存在某个位置,使![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2181c78134c310f746eab44b9124e63b.png)
(4)存在某个位置,使
平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4e4a162f12d12a082b8d8fdd1aeab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa2a83fed9bf4cb09d84a980452e346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/17/49c45696-902c-4380-a480-fc6d28cf58aa.png?resizew=208)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c2f99ac2b6bc91b983628b68a5cd0d.png)
(2)点M在某个球面上运动
(3)存在某个位置,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2181c78134c310f746eab44b9124e63b.png)
(4)存在某个位置,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c70966a318ef8ecf874257f5c5e5db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/657dffbd3623b705f871878fbd9df57e.png)
您最近一年使用:0次
2020-11-30更新
|
1076次组卷
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5卷引用:广西南宁市武鸣区武鸣中学2023届高三三模试卷数学试题