【建立模型】
(1)如图1.等腰
中,
,
,直线
经过点C,过点A作
于点D,过点B作
于点E,求证∶
;
【模型应用】
(2)如图2.已知直线
与
轴交于点A,与
轴交于点B,将直线
绕点A逆时针旋转
至直线
,求直线
的函数表达式∶
(3)如图3,平面直角坐标系内有一点
,过点B作
轴于点A,
轴于点C,点Q是线段
上的动点,点
是y轴右侧一动点.试探究
能否成为以P为直角顶点的等腰直角三角形?若能,直接写出所有符合要求的点P的坐标,若不能,请说明理由.
(1)如图1.等腰
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/323b786e35c9b762d00f2b2ef74ce1d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c1c122603b60b6f1a1334ddb56c3fb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c182a9d9fd0a7023b710cd671d9468e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172d93e9195e92d7924c0aea3d4c7eaa.png)
【模型应用】
(2)如图2.已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c488aea297317c76476ec3367cfe7f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
(3)如图3,平面直角坐标系内有一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12875fcf35ee2756a8faec544afa4ec5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f07aeaad7ee076170141958bc50c281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05de5eef286a1b48012246c0cf88a1c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c351c8aa0dbc38a98e6d023741131cd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8dcc9f79fe5f07f25447aa442ee14ad.png)
23-24八年级上·山东济南·期末 查看更多[3]
山东省济南市章丘区2023-2024学年八年级上学期期末数学试题(已下线)专题19.34 一次函数几何分类专题(动点问题)-2023-2024学年八年级数学下册基础知识专项突破讲与练(人教版)福建省泉州市第九中学2023-2024学年下学期八年级第一次月考数学试题
更新时间:2024-03-01 16:39:17
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】综合与探究
如图,直线
与x轴、y轴分别交于A、B两点,且
,
,点D(t,0)
是x轴上一点,过D点作直线
轴.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/26/396f87ca-c59e-42b7-a8df-fe1470e88058.png?resizew=199)
(1)求直线
的解析式;
(2)当
时,点P在直线
上,当
的值最小时,求点P坐标;
(3)当
________时,
的面积为4;
(4)当
时,在坐标平面内是否存在点Q,使以点A、B、D、Q为顶点的四边形是平行四边形?若存在,请直接写出点Q的坐标;若不存在,请说明理由.
如图,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a528d113fdb2cded90a765015edd2774.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9466d03bc916a9169eaf39863d59fceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
是x轴上一点,过D点作直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15ebdaa4b3e74f75ae6f2d3cdf9b6a9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/26/396f87ca-c59e-42b7-a8df-fe1470e88058.png?resizew=199)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2a51944c720568f35d443589dfc1aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a13ec9a812274ad0839f20ba17348687.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
(4)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbeede118c407a800b05757b9a1393e.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如图,直线
分别与
轴交于
两点,点
的坐标为
,过点
的直线交
轴正半轴于点
,且
.
两点的坐标;
(2)在
轴上方是否存在点
,使以点
为顶点的三角形与
全等?若存在,求出点
的坐标,若不存在,请说明理由;
(3)点
是
轴上的一点,连接
,将
沿直线
翻折,当点
的对应点
恰好落在
轴上时,求此时直线
的函数表达式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e80a46bb1187354f33e210d927233a66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d708cb763716467219215cdc0782c0a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ae6f48b9a53c0155a692509cf31f7e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25862f91a51236be6547552c272b0b92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bce7bd73b0db6078a805f6129e4ab2d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da6b93dbe5272a5167ff4e2918bec864.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e6a6028d0f3cf0d44a39f90e995a72b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/357265c532428e886a643e8e653eec9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】如图
,
的
和
的平分线
,
相交于点
,
.
![](https://img.xkw.com/dksih/QBM/2021/7/10/2761152048988160/2788851633364992/STEM/f9cf0e75b5734dc182852b89c6988610.png?resizew=533)
(1)求
的度数;
(2)如图
,连接
,求证:
平分
;
(3)如图
,在⑵的条件下,在
上取点
,使得
,且
,
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.png)
![](https://img.xkw.com/dksih/QBM/2021/7/10/2761152048988160/2788851633364992/STEM/f9cf0e75b5734dc182852b89c6988610.png?resizew=533)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec412ebd940d71b983ce4877e3401ee.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d720014c99d2ab185687c5c4318bf9cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b73c8eb1132647aba0881ecb581c1d82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ebb33adb2310a6e03918761e68204a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】在
中,
,
,D是
边上的中点,E是直线
右侧的一点,且
,连接
,过点D作
的垂线交射线
于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/25/379acd8d-ba81-4150-a82d-3a3c8ef41ba0.png?resizew=448)
(1)点C到
的距离为______;
(2)如图1,当点E在
的外部时.
①求证:
;
②如图2,连接
,当
时,试探究
与
之间的数量关系;
(3)若
,请直接写出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d30f9b7a6123f13fa0793ead76dc651a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d888e40f68fe8a24d5dc9c749024808.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/25/379acd8d-ba81-4150-a82d-3a3c8ef41ba0.png?resizew=448)
(1)点C到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)如图1,当点E在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7faabc484ce3666706c1beffda4bcfe2.png)
②如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7595bdaea3dfa548c0fcfe3708387476.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/001054ba5f6f695736836c47088333b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
【推荐1】如图1,
为等腰直角三角形,
,点D为
外一点,连接
,过点A作
,交
于点E,过点D作
,垂足为H,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/31/9445e2b2-a973-4e1e-a200-0f9f034b78b7.jpg?resizew=516)
(1)求证:
;
(2)如图2,延长
到点G,连接
,使得
,F为
上一点,连接
,若
.求证:
;
(3)如图3,点K在
内,连接
,当
的值最小时,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8b1472e121da0ae5550329cfda5f0a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41a7cf70f8772d8fea4599b18df2c88f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65dcc03dc69a20ba0633035e5b8abb80.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/31/9445e2b2-a973-4e1e-a200-0f9f034b78b7.jpg?resizew=516)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30e50e094cd2849e38859b36aad0b0c.png)
(2)如图2,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce8f887360a533f0a25b0b34fb11f0a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fe2f29525e291cef0b5eeacc376971c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d683d01ac4de4926c0d40a50e3e13c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9527f2c123dfba738f18780be451c52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecc8625de9f2181d147f180439387813.png)
(3)如图3,点K在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/633e0d013dc0b31935608b1e88d1a29f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e80e02e9093c11658f761cc2c79dd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a441fa2496e43f66c43a20a5b2682b81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccc376ed93fb7d32b932c975040ac19.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】在平面直角坐标系中,抛物线
与x轴交于A、B两点.
(1)抛物线
经过的定点的坐标为
(2)当点
在这个函数图像时,
①求抛物线的函数关系式;
②抛物线上有一点P,连结
若
的面积为
时,求点P的坐标;
③当
时,函数的最大值与最小值的差是3,求m的值:
(3)在抛物线
上的点
的横坐标分别为
、4,连接
,将线段
绕点M逆时针旋转
的线段
,以
为邻边作正方形
.当抛物线在正方形
内的部分所对应的函数值y随x的增大而减小或y随x的增大而增大时,直接写出a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1300fa9a0667841981682b1f6ae8028.png)
(1)抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1300fa9a0667841981682b1f6ae8028.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f2b1f4120365cb6ee4925fe417563f9.png)
①求抛物线的函数关系式;
②抛物线上有一点P,连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e46d7797d84ccffea954e51c5ff31fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32dafa09346e8a6af1e994b8f2d6212b.png)
(3)在抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1300fa9a0667841981682b1f6ae8028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa5d7dbd7b6905986c828a0f220d9bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2c70fcaa661df4fbcad820b439accda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eafb381c59b16509c2a5acc4945313c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5627dee61ff1a179ed56a7e627927448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5627dee61ff1a179ed56a7e627927448.png)
您最近一年使用:0次
解答题-作图题
|
较难
(0.4)
【推荐1】已知:如图1,在Rt△ABC中,∠ACB=90°,CA=CB.过点C作直线CP,点A关于直线CP的对称点为E,连接AE、BE,直线BE交直线CP于点F
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/24/a7611661-753f-4aee-bf3a-bbe2ca10ad2f.png?resizew=320)
(1)若∠PCA=18°,则∠CBF=_______°
(2)若90°<∠PCA<180°,在备选图中补全图形,用等式表示等式AC、BF、EF之间的数量关系,并证明
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/24/a7611661-753f-4aee-bf3a-bbe2ca10ad2f.png?resizew=320)
(1)若∠PCA=18°,则∠CBF=_______°
(2)若90°<∠PCA<180°,在备选图中补全图形,用等式表示等式AC、BF、EF之间的数量关系,并证明
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】如图1,在中,
,点E在
边上,D为
边上一点,G在
的延长线上,连接
,
,
,若
,
,
.
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5f3be56ff71e09fb420437d7ee5cb94.png)
(2)请找出图中与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(3)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5927a828e8a652a0e6caaa8bbbb4ea0f.png)
您最近一年使用:0次