名校
1 . 如图,四棱锥
的底面为直角梯形
,
,
,
,
底面
,且
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2020/3/29/2430055314219008/2430151248576512/STEM/5de1891ff3db45d1aee80dc295bfb305.png?resizew=177)
(1)证明:
;
(2)设点
是线段
上的动点,当直线
与直线
所成的角最小时,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd8e727e4efc22b49649f71ae9c9d84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829018a6ca0aff95d89e3f7cd943274e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87261df80b82221732329b6ef3fdda7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2020/3/29/2430055314219008/2430151248576512/STEM/5de1891ff3db45d1aee80dc295bfb305.png?resizew=177)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f75139b83eee3bb961eea53d167098.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eb86af236d321306d980046a377d0d7.png)
您最近一年使用:0次
名校
解题方法
2 . 在
中,
,
.已知
分别是
的中点.将
沿
折起,使
到
的位置且二面角
的大小是60°,连接
,如图:
![](https://img.xkw.com/dksih/QBM/2020/3/23/2425940490993664/2426672540499968/STEM/a2108c20-28bc-4d95-bf79-e55d1952becb.png?resizew=504)
(1)证明:平面
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52856669e6adf246c92923b4bb120d91.png)
(2)求平面
与平面
所成二面角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa8cee7d2463f6f7d352e8b65f47cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af260e0d98c95d1e092dc4c6d348e3ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b7308135fda2e4b9b16457b6aa12df3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d70de1ffdd9aa376b09bbcfa12644a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/943f657dadcdf419f6178b00ba897e1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7807f6a0d316671ed34c23e32fc7408.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7268ba86f707879fab1e23f31809763b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56dbd4e4011c5c6f0aa3779d7b24c661.png)
![](https://img.xkw.com/dksih/QBM/2020/3/23/2425940490993664/2426672540499968/STEM/a2108c20-28bc-4d95-bf79-e55d1952becb.png?resizew=504)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d002fa69aa1f733593034296a38faff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52856669e6adf246c92923b4bb120d91.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ded3e6f9517494539067376c8e4514.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/330808dc42f8e244c35791d572d83a57.png)
您最近一年使用:0次
2020-03-24更新
|
1302次组卷
|
11卷引用:【校级联考】湖南省湖南师范大学附属中学、岳阳市第一中等六校2019届高三下学期联考理科数学试题
【校级联考】湖南省湖南师范大学附属中学、岳阳市第一中等六校2019届高三下学期联考理科数学试题湖南湖北四校2019-2020学年高三下学期4月学情调研联考理科数学试题2019届湖南省娄底市高三下学期4月模拟理科数学试题2020届山东省日照第一中学高三上学期期中数学试题2019届甘肃省天水市第一中学高三下学期最后一模考前练数学(理)试题(已下线)专题02 各类角的证明与求解(第三篇)-备战2020年高考数学大题精做之解答题题型全覆盖(已下线)专题06 立体几何中折叠问题(第三篇)-备战2020年高考数学大题精做之解答题题型全覆盖安徽省滁州市定远县育才学校2020届高三下学期6月模拟数学(理)试题(已下线)考点25 空间角与立体几何的综合应用-2021年新高考数学一轮复习考点扫描河北正定中学2021届高三上学期第三次半月考数学试题(已下线)专题24 盘点立体几何中折叠问题——备战2022年高考数学二轮复习常考点专题突破
名校
解题方法
3 . 如图,
是边长为2的菱形,
,
平面
,
平面
,
.
![](https://img.xkw.com/dksih/QBM/2020/3/21/2424318026252288/2424868553523200/STEM/56c817d0862b4f0b99bfad7aab0217c0.png?resizew=196)
(1)求证:
;
(2)求几何体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f5eec0addba78f2e0cdfb7ecc59a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/477dc280b77f5640565dbc0ddf24460a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a36f7e5128bcf12583792fe8a4a4d8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b89434615f067ab0991a637b32d87a4d.png)
![](https://img.xkw.com/dksih/QBM/2020/3/21/2424318026252288/2424868553523200/STEM/56c817d0862b4f0b99bfad7aab0217c0.png?resizew=196)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8de4a54cc7818be87a239f6de5f5d05b.png)
(2)求几何体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d78d008923973b0529d4f7c9f1a2717.png)
您最近一年使用:0次
2020-03-22更新
|
434次组卷
|
5卷引用:【校级联考】湖南省2019届高三六校(长沙一中、常德一中等)联考数学(文科)试题
名校
解题方法
4 . 直三棱柱(侧棱与底面垂直的棱柱)
中,D为
中点,F为线段
的中点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/6b5ba842-6eb8-4bfa-9df8-c1dd961aae54.png?resizew=143)
(1)若M为
中点,求证:
面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1859959fdb4c5edd8056893f94a10a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93ecad355286188fd317939fa50f9555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d10bb4ab27890f84c863c7b8bce3214.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/6b5ba842-6eb8-4bfa-9df8-c1dd961aae54.png?resizew=143)
(1)若M为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ade8233bc5e455bc00825e081647519.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e53b212640dadf751ef7f65a78a209.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fc86f58b772ea276fc285b95dffa790.png)
您最近一年使用:0次
2020-03-04更新
|
271次组卷
|
2卷引用:湖南省怀化市2021届高三下学期3月一模数学试题
名校
解题方法
5 . 已知椭圆
:
的离心率为
,左、右顶点分别为
、
,过左焦点的直线
交椭圆
于
、
两点(异于
、
两点),当直线
垂直于
轴时,四边形
的面积为6.
(1)求椭圆的方程;
(2)设直线
、
的交点为
;试问
的横坐标是否为定值?若是,求出定值;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(1)求椭圆的方程;
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
您最近一年使用:0次
2020-02-19更新
|
492次组卷
|
2卷引用:湖南省长沙市开福区第一中学2019-2020学年高二上学期第二次阶段性考试数学试题
6 . 已知四棱柱
的所有棱长都为2,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/69dae3b2-d6a2-4380-ae69-9f7ce556b784.png?resizew=162)
(1)证明:平面
平面
;
(2)求直线
与平面
所成的角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4d13ecb54b1006051d2561327aa4755.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/69dae3b2-d6a2-4380-ae69-9f7ce556b784.png?resizew=162)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d40fad0bf738887305d76fb6c23a22c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc1c04946340198af69170d4ebd4b42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
您最近一年使用:0次
2019-12-30更新
|
324次组卷
|
2卷引用:2020届湖南省株洲市高三一模数学(文)试题
7 . 如图(1),等腰梯形
,
,
,
,
,
分别是
的两个三等分点,若把等腰梯形沿虚线
、
折起,使得点
和点
重合,记为点
, 如图(2).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/5bced261-499d-4b66-8cce-f0340ec91b91.png?resizew=345)
(1)求证:平面
平面
;
(2)求平面
与平面
所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca7e1a727ba332984ad857b3d25344d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9c3ec174b1ce835cc8737ff6ce57e52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/5bced261-499d-4b66-8cce-f0340ec91b91.png?resizew=345)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f020ca4ad44801691235958e253907d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e6c2dad46a9052a4185a4f7b4ae8a2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
您最近一年使用:0次
2019-12-19更新
|
881次组卷
|
8卷引用:【市级联考】湖南省株洲市2019届高三教学质量统一检测(一)理科数学试题
解题方法
8 . 在平面四边形
(图①)中,
与
均为直角三角形且有公共斜边
,设
,∠
,∠
,将
沿
折起,构成如图②所示的三棱锥
,且使
=
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/22/cb535cbd-4068-4dc8-b126-159c0014da1c.png?resizew=213)
(1)求证:平面
⊥平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c593ebdb2f1934a0cb56f8c44f454f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5e1441a49e782ff0ef46e776cde06a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/601cf5040a8d4a0fae20d127572d5bca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73bedd38b5b418e57308a780f333874a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81b32ae75c9beabff560f1b52a52d434.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/900b844294e8c07ea9a858adb845121c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7881094ce2f907c3aaf664318ecd3e2d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/22/cb535cbd-4068-4dc8-b126-159c0014da1c.png?resizew=213)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55bb03ab214cf6a07f4ecc48426d30da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ddc76d96d6951ebfef3fe63892a1114.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f4c64e9b49c75fa9d04676e757811b4.png)
您最近一年使用:0次
9 . 如图,四边形
为菱形,
为
与
的交点,
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/98973bf3-ff79-4e43-a5f4-d03dd7907abf.png?resizew=200)
(1)证明:平面
平面
;
(2)若
,
,三棱锥
的体积为
,求菱形
的边长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662698361c6b3ddaf0c28a3c87be53e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/98973bf3-ff79-4e43-a5f4-d03dd7907abf.png?resizew=200)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4a46fbde58e12b1edc038ae9e921722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926584088b939200d88e64318f2d4e6c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aeeee5f39ee6f9c3ea01ada75d63b93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b565e518d475a50358fedff2f0bb8dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41bbced6026f9512afa005638c6e5c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2020-04-08更新
|
273次组卷
|
3卷引用:2018届湖南省怀化市高三第三次模拟数学(文)试题
解题方法
10 . 如图,在四棱锥
中,
底面
,底面
是直角梯形,
为侧棱
上一点,已知
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/42ba2a4a-754d-4aa4-9af7-d891b86ddd9b.png?resizew=174)
(Ⅰ)证明:平面
平面
;
(Ⅱ)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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f24063fa661c8374054eac71e9ab2b88.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/42ba2a4a-754d-4aa4-9af7-d891b86ddd9b.png?resizew=174)
(Ⅰ)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a3fd5284e160896f07ce367645fd04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(Ⅱ)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/800faf43a424f2dd708d1426e4e91615.png)
您最近一年使用:0次