如图,在平面直角坐标系中,点
是坐标原点.边长为
的正方形
的顶点
,
分别在
轴和
轴的正半轴上,点
是对角线
上一点,连接
、
,
的延长线交
于点
,若
的面积为
.
(1)求点
的坐标;
(2)求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/132de9682ce9a412b7b517aa209726ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/598c4ff9fc8518fa4829e39254d3f6e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7a3e520a16d4fdd73c4e6a4ce7be0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25d1cf78232452667bcb8fb71c8eadee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45e61680ffc6f940bd5b8afda3ae9c59.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/4/3a6fc372-a77b-4b35-bf33-e06d0d9bfb05.png?resizew=148)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc0b2b6bda0b4f47e157c41ef63452ec.png)
更新时间:2017-06-04 23:02:27
|
相似题推荐
解答题-问答题
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适中
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【推荐1】已知如图,在平面直角坐标系中,A(-1,-3),OB=
,OB与x轴所夹锐角是45°
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/6c9d8d53-e8da-4776-b24a-d086d85675fb.png?resizew=177)
(1)求B点坐标
(2)判断三角形ABO的形状
(3)求三角形ABO的AO边上的高.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/6c9d8d53-e8da-4776-b24a-d086d85675fb.png?resizew=177)
(1)求B点坐标
(2)判断三角形ABO的形状
(3)求三角形ABO的AO边上的高.
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解答题-作图题
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【推荐2】如图,
三个顶点都在格点上,结合所给的平面直角坐标系解答下列问题.
![](https://img.xkw.com/dksih/QBM/2023/6/7/3254470790717440/3254610699771904/STEM/3a3dd3cdebc84f448bdcc6615a465907.png?resizew=329)
(1)将
先向右平移3个单位长度,再向下平移2个单位长度,画出经过两次平移后的
,写出点
,
的坐标;
(2)将
绕点
逆时针旋转
,画出旋转后的
;
(3)求出
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/2023/6/7/3254470790717440/3254610699771904/STEM/3a3dd3cdebc84f448bdcc6615a465907.png?resizew=329)
(1)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d542d6a10970a4f6ca6a495e6b9c1c.png)
(3)求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d542d6a10970a4f6ca6a495e6b9c1c.png)
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【推荐1】若一次函数
图象与
轴、
轴的交点分别为
、
,且
的周长为
(
为坐标原点),求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07565f10847840e0fb07b05218ad17fa.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b8189f7b0ffe4d20bf0fad43b4ed589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec96333ce215db10a533acaa92b5103f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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名校
【推荐2】如图1,在
中,
,
,
,点
,
分别在
,
上,且满足
,
,点
从
出发,沿着折线
运动,到达点
时停止运动.设点
运动的路程为
,连接
,记
的面积为
,请解答下列问题:
关于
的函数关系式,并注明自变量x的取值范围;
(2)如图2,在给定的平面直角坐标系中,画出
的函数图象,并写出函数
的一条性质;
(3)结合函数图象,若直线
与函数图象只有一个交点,则k的取值范围是______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf95741bc36eabfd36db4ed4e8282804.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/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e4814565292192e40bd86a10ee7b661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86786587c840c1d58ba04369cab75ff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b7e2ae7ffaaca73a9fa2f11d517ff93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/365822bd3945e6a3e871ca979c84cc12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7fbd6b9f85c086ac95562fe45e8d969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)如图2,在给定的平面直角坐标系中,画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(3)结合函数图象,若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5d7c37dbfd6e9133ca40e7ce37a1e2d.png)
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解答题-证明题
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名校
【推荐1】如图,在
中,
,
,
分别是
,
的中点,
,
.
(1)求证:四边形
是菱形;
(2)连接
,若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d4ea87a0837c4eee99c8b5ba6ec977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d354155f71a1736c1c9186168695edd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/13/79848d3d-51e2-45cf-a7e5-d178e8a35608.png?resizew=165)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd0763b031b7e6b6d87ce3554ac482d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
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【推荐2】问题背景:在解决“半角模型”问题时,旋转是一种常用方法.如图①,在四边形ABCD中,
,
,
,点E,F分别是BC,CD上的点,且
,连接EF,探究线段BE,EF,DF之间的数量关系.
![](https://img.xkw.com/dksih/QBM/2021/12/14/2872437413593088/2922775210033152/STEM/0a37e15f-9fd2-42de-a024-86cd194e0b39.png?resizew=408)
(1)探究发现:小明同学的方法是将
绕点A逆时针旋转120°至
的位置,使得AB与AD重合,然后证明
,从而得出结论:____________;
(2)拓展延伸:如图②,在正方形ABCD中,E、F分别在边BC、CD上,且
,连接EF,(1)中的结论是否仍然成立?若成立,请写出证明过程,若不成立,请说明理由.
(3)尝试应用:在(2)的条件下,若
,
,求正方形ABCD的边长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eee296a7d9fba487f1485c61580196f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21eb847a1722ed6e10e23c59d53fe7d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a9eb456c912e01458c19b06e83a5c9d.png)
![](https://img.xkw.com/dksih/QBM/2021/12/14/2872437413593088/2922775210033152/STEM/0a37e15f-9fd2-42de-a024-86cd194e0b39.png?resizew=408)
(1)探究发现:小明同学的方法是将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bbd6f0a0412d0f43ce1f7c1d530e56e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb7d143a1d6ba708f17021e41efd7d9a.png)
(2)拓展延伸:如图②,在正方形ABCD中,E、F分别在边BC、CD上,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192155e6a3aade305b76b1eb7c75e30c.png)
(3)尝试应用:在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50f218914337edd06e59e75d90b777e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ade06068471a9d76e32b417bef7551.png)
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【推荐3】综合探究
如图1,在学习了平行四边形相关知识后,老师指导同学们对正方形进行了探究,在正方形
中,过点C作射线
,垂足为C,点P在射线
上.
(1)如图2,若点P是线段
中点时,连接
,并将
绕点P逆时针旋转
与
交于点E,根据题意在图中画出图形,并判断线段
与
的数量关系为________.
【问题探究】
(2)若点P在线段
上时,连接
,并将
绕点P逆时针旋转
与
交于点E,则(1)中的结论是否成立?若成立,给出证明;若不成立,说明理由.
【拓展延伸】
(3)如图3,若点P在射线
上移动,将射线
绕点P逆时针旋转
与
交于点E,如果
,
,求
的长.
如图1,在学习了平行四边形相关知识后,老师指导同学们对正方形进行了探究,在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f76aae027f86e42bd67347c3d2f9ac7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
(1)如图2,若点P是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
【问题探究】
(2)若点P在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
【拓展延伸】
(3)如图3,若点P在射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2899e607479d8d1c47d954ae9ebb7144.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd946dad8b716592833a7bc14045a6d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
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解答题-问答题
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名校
解题方法
【推荐1】如图1所示,边长为4的正方形
与边长为
的正方形
的顶点
重合,点
在对角线
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/10/74a9ccd2-5e16-46ac-a27c-442abdb7989c.png?resizew=325)
【问题发现】如图1所示,
与
的数量关系为________;
【类比探究】如图2所示,将正方形
绕点
旋转,旋转角为
,请问此时上述结论是否还成立?如成立写出推理过程,如不成立,说明理由;
【拓展延伸】若点
为
的中点,且在正方形
的旋转过程中,有点
、
、
在一条直线上,直接写出此时线段
的长度为________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9eb4c4289e5367201455a357bec8ec7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1321a4f8d931503b75c46777f70c1409.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/10/74a9ccd2-5e16-46ac-a27c-442abdb7989c.png?resizew=325)
【问题发现】如图1所示,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
【类比探究】如图2所示,将正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1321a4f8d931503b75c46777f70c1409.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/675684987c82faac0372da76d8663469.png)
【拓展延伸】若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1321a4f8d931503b75c46777f70c1409.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,在等边
中,
,
于
点,点
是
上一点,延长
至点
,使
.
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712381349117952/2716464761438208/STEM/2eebd494063d434d8bb4ac38afe20e6e.png?resizew=134)
(1)求证:四边形
是菱形;
(2)若四边形
是正方形,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4744b427f036dfbc6db68c87cd5c54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88fcfdb7a9191ef14e3b74578245d347.png)
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712381349117952/2716464761438208/STEM/2eebd494063d434d8bb4ac38afe20e6e.png?resizew=134)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/818110be1feca07319280f3a2dc71489.png)
(2)若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/818110be1feca07319280f3a2dc71489.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
您最近一年使用:0次