名校
1 . 给定一个n项的实数数列
,任意选取一个实数c,变换
将数列
变换为数列![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d5280b3866264f8c266fbcfc3de96fe.png)
,再将得到的数列继续施行这样的变换,这样的变换可以连续施行多次,并且每次所选择的实数c可以不相同,将第
次变换记为
,其中
为第
次变换时选择的实数.如果通过k次变换后,数列中的各项均为0,则称
为“
次归零变换”,如
项数列
有“
次归零变换”
.
(1)对数列
,请给出其一个“
次归零变换”,其中
;
(2)求证:对任意
项数列,都存在“
次归零变换”;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53032c9a9a3edca24a7ed909e29a58b.png)
(3)分别判断两个数列
与![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b09a30c1f614670c58260ac05637fa6.png)
是否存在“
次归零变换”,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71440f7f7adb82343de4e1fe714844c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15e5927e6b179a7df32697f18ba04b41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9304e71a623c4412188a800046a970d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d5280b3866264f8c266fbcfc3de96fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd261890430da46de995859443c31a0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d0c165709cb397edbdf03aecee92bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5925987d5a6eb1ce1fec68b810cb6fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9e5dfcc28321b563a8012ec2899c502.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddb41001678e62a7f251aca18ba87223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392131fb1129db593075a41e42614c71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1925f666f670a98809ce07b2db292642.png)
(1)对数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63541441d26f277d9ed7816c089c6b6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32122984badd2651714490544ab42682.png)
(2)求证:对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfc321599521a98661ed719cc82ca87c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53032c9a9a3edca24a7ed909e29a58b.png)
(3)分别判断两个数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0f28c61ca6fda7a77fdae8b39b41519.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b09a30c1f614670c58260ac05637fa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4259bd8918d091c52eb0bd5e3e0805.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3493454f81c555d65d46357d719c5fdf.png)
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解题方法
2 . 如图,已知正方体
的棱长为1,点M为棱AB的中点,点P在侧面
及其边界上运动,则下列选项中不正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/8/839c6096-a097-450e-a94f-3f9e35a3facd.png?resizew=167)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/8/839c6096-a097-450e-a94f-3f9e35a3facd.png?resizew=167)
A.存在点P满足![]() |
B.存在点P满足![]() |
C.满足![]() ![]() |
D.满足![]() ![]() |
您最近一年使用:0次
2023-02-01更新
|
820次组卷
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4卷引用:上海市杨浦高级中学2023届高三下学期开学考试数学试题
上海市杨浦高级中学2023届高三下学期开学考试数学试题上海市黄浦区格致中学2024届高三下学期开学考试数学试题河南省许昌市禹州市高级中学2022-2023学年高二上学期12月期末数学试题(已下线)专题02 空间动点轨迹8种题型归类-【巅峰课堂】2023-2024学年高二数学上学期期中期末复习讲练测(人教A版2019选择性必修第一册)
名校
解题方法
3 . 已知平面向量
,
,
,其中
为单位向量,若
,则
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dc64abe49847ade9b78678ba1f8e0e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dc64abe49847ade9b78678ba1f8e0e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99d38e16c0e70baa678d8c67553dbffb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cc23a04cdac6439ea170e799f1c1df5.png)
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2023-01-13更新
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943次组卷
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7卷引用:上海市黄浦区格致中学2023届高三下学期开学考试数学试题
4 . 设
是定义在
上的函数,若对任何实数
以及
、
恒有
成立,则称
为定义在
上的下凸函数.
(1)试判断函数
,
是否为各自定义域上的下凸函数,并说明理由;
(2)若
是下凸函数,求实数
的取值范围;
(3)已知
是
上的下凸函数,
是给定的正整数,设
,
,记
,对于满足条件的任意函数
,试求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2905ef7674574749b4ca9dd9cfe58cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c28e384ba050b238e11f7c74d3002aab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d898782882242c724ae66b61f00edd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(1)试判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f03c73257c848e5da59b345f136475f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a2db785f63a01732bcf933e72f62447.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55463f6109aa747a79a49eb591ac015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01bea8bf593f594c51fc7cc547482bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67590720d8a7ab397d336cef1c4b0c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/799db5b849e82cf60570dc7ef5eeab96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42940d455965d307058d023079dbda9f.png)
您最近一年使用:0次
名校
解题方法
5 . 设双曲线
的方程为
.过其右焦点
且斜率不为零的直线
与双曲线交于
两点, 直线
的方程为
,
在直线
上的射影分别为
.
(1)当
垂直于
轴,
时, 求四边形
的面积;
(2)当
,
的斜率为正实数,
在第一象限,
在第四象限时, 试比较
和
的大小, 并说明理由;
(3)是否存在实数
, 使得对满足题意的任意直线
, 直线
和直线
的交点总在
轴上, 若存在, 求出所有的
的值和此时直线
与
交点的位置; 若不存在, 说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c477e5ade921ffa8377c4719319380ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6f7b16d65f1b2b8bea8cf4a83fde925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11dec747672851158042b302071f3f14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520f8abda6a85e7ef6f281fc2df853fa.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aeb9a94e392f6759b18abed89aacc5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.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/b92c1769f8ccd41bc5be3e5efb63e74e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
(3)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7062b0d525a2be679fcf732d773a0894.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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6 . 已知函数
和
,它们的图像分别为曲线
和
.
(1)求函数
的单调区间;
(2)证明:曲线
和
有唯一交点;
(3)设直线
与两条曲线
共有三个不同交点,并且从左到右的三个交点的横坐标依次为
,求证:
成等比数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86161d12df385eb4cfec8a8a38277fc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8da208132c56cf53ce7f4d0985582c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)证明:曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(3)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46111e4d12c21798aa213c0d7804c2ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e632de0a4a7142242b1c4310b0a6f185.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b8ec9d4206ea66a02de5c4a1e1e911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b8ec9d4206ea66a02de5c4a1e1e911.png)
您最近一年使用:0次
2022-12-26更新
|
577次组卷
|
3卷引用:上海市大同中学2024届高三上学期开学考数学试题
7 . 已知离心率为
的椭圆
的中心在原点
,对称轴为坐标轴,
为左右焦点,
为椭圆上的点,且
.直线
过椭圆外一点
,与椭圆交于
两点,满足
.
(1)求椭圆
的标准方程;
(2)若
,求三角形
面积的取值范围;
(3)对于任意点
,是否总存在唯一的直线
,使得
成立,若存在,求出直线
的斜率;否则说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd236405e907e2a2be452c6b61cc5e85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14277e52adebfc9788f35ec74dafbc15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3a1467ecf286e3cadaf5aa006606f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b44e00b86ad1e900c673fe204701393.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0db2c49919467a2e14540f2aabd05cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
(3)对于任意点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6004a4d8671dcbd69059617780cd6a78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
2022-12-02更新
|
499次组卷
|
3卷引用:上海市位育中学2024届高三上学期开学考试数学试题
22-23高三上·上海浦东新·期中
8 . 已知二次曲线
.
(1)求二次曲线
的焦距和离心率;
(2)若直线
与二次曲线
及圆
都恰好只有一个公共点,求直线
的方程;
(3)任取平面上一点
,证明:
中总有一个椭圆和一条双曲线都通过点
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72302dec2bb90d04a8f5a51d43082306.png)
(1)求二次曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc46e1fa087d602b5d041b99f3410de0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4569ddc5bcf091264c8df01d764fe5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(3)任取平面上一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d772943ec7caf61d2dad5799765847ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a94555857a26590865f337f8c4a93c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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名校
9 . 对于数列
,若存在常数
,使得对任意
,
与
中至少有一个不小于
,则记作
,那么下列命题正确的有______ (写出所有正确命题的序号).
(1)若
,则数列
各项均大于或等于![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44323fec38bf5943615724a443b24648.png)
(3)若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31be7ec458e648ca524f5fd48f3b5cba.png)
(4)若
,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209591cfb9f8271f5ad48d89f214f22e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090426eb29836bc30c006b3739c08057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a76fd68f19c5b7250cf92d4c5df9f1f3.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a76fd68f19c5b7250cf92d4c5df9f1f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a76fd68f19c5b7250cf92d4c5df9f1f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d2bcf80aa82e28eddb5b66c3e8f785.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44323fec38bf5943615724a443b24648.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a76fd68f19c5b7250cf92d4c5df9f1f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31be7ec458e648ca524f5fd48f3b5cba.png)
(4)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a76fd68f19c5b7250cf92d4c5df9f1f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a343de1cc0641d8349f0fe6538e42db.png)
您最近一年使用:0次
名校
10 . 已知函数
是定义在
上的偶函数,在
上是增函数,且
恒成立,则不等式
的解集为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/933093b52cca887f597cbe22a5467b11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe86cace140f2c3588ab115837bbfc9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/566f019a64a87dbbfc4b61998094afb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53194f1718ca458f68f6ea232e4b4949.png)
您最近一年使用:0次