如图,在
中,
是边
上的高,在这个三角形内有一个内接矩形
,矩形的一边在
上,另两个顶点分别在
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/10/f780449f-f615-48e3-9d4d-2d2a3f171b61.png?resizew=181)
(1)当
,
,
时,求
的长;
(2)当
,
,
,
时,求出
的值;
(3)当
,
,当矩形
的面积最大时,求这个矩形的边长.
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ac79e422ba4876949f0514c44539b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/10/f780449f-f615-48e3-9d4d-2d2a3f171b61.png?resizew=181)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53ea5309e3cc208bdd62106a4c424325.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ebb33adb2310a6e03918761e68204a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53ea5309e3cc208bdd62106a4c424325.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02d4a1be45739ebb7e54af1d3a183c0c.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ac79e422ba4876949f0514c44539b1.png)
更新时间:2023-02-08 22:18:25
|
相似题推荐
解答题-问答题
|
较难
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名校
【推荐1】如图,在平面直角坐标系中,已知抛物线
与
轴交于点
,点
,与
轴交于点
,其中
,
,
.
(1)求该抛物线的函数表达式:
(2)若点
是
轴上的点,且以
,
,
为顶点的三角形与
相似,求点
的坐标.
(3)点
是抛物线
的对称轴上的一点,点
是坐标平面内一点,若以
,
,
,
为顶点的四边形是菱形,请直接写出所有符合条件的点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a525534689bd2701205d4ab17574c39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c850811ba59a05e945a665196539a048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f0ec7f84f716a316ec92d133927666c.png)
(1)求该抛物线的函数表达式:
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/5/953ade4e-71d2-4b6e-a866-8439a5f4a8a6.png?resizew=348)
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【推荐2】已知有如下抛物线:,经过A,B,C,已知A为
,
,请回答以下题目:
(1)求解该抛物线的解析式并求出顶点的坐标;
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
①当为
为底边的等腰三角形时,求出点D的坐标;
②若时,求出点D的坐标;
③若直线交y轴于点N,过B作
的平行线交y轴于点M,当D点运动时,求出
的最大值以及此时D的坐标.
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【推荐1】如图,在
中,
,
,
.动点P从点A出发,以
的速度沿
边向终点B运动,过点P作
交
或
于点Q,D为
中点,以
、
为邻边构造矩形
,设矩形
与
重叠部分图形的面积为
,点P的运动时间为
.
的长;
(2)当点E落在
边上时,求t的值;
(3)求S关于t的函数关系式,并直接写出自变量t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d3c9ce32b721995f355eea411340e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df3b2901ad26337818f75e81448ebb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d989a128e30a701dfff5592476a76bab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d84733f9dc908ceb11459cc2aed580ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d63d224bf8174403426ddca75babd62a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d63d224bf8174403426ddca75babd62a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb194fd63b75af067ba10dee7471d299.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d744165d6aad705f64de41a9d931750a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
(2)当点E落在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(3)求S关于t的函数关系式,并直接写出自变量t的取值范围.
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】请阅读下列材料,并完成相应的任务.
三等分角是古希腊三大几何问题之一.如图(1),任意∠ABC可被看作是矩形BCAD的对角线BA与边BC的夹角,以B为端点的射线BF交CA于点
,交DA的延长线于点F.若
,则射线BF是∠ABC的一条三等分线.
证明:如图(2),取EF的中点G,连接AG,∵四边形BCAD是矩形,∴
,AD
BC.在Rt△AEF中,点G是EF的中点,∴
……
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/15/f0721e23-ee5a-48f1-88df-fd1e0eb39add.png?resizew=433)
(1)任务一:上面证明过程中得出“
”的依据是___;
(2)任务二:完成材料证明中的剩余部分;
(3)任务三:如图(3),在矩形ABCD中,对角线AC的延长线与∠CBE的平分线交于点F,若
,
,请直接写出BF的长.
三等分角是古希腊三大几何问题之一.如图(1),任意∠ABC可被看作是矩形BCAD的对角线BA与边BC的夹角,以B为端点的射线BF交CA于点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9366db1b71034abbe1a5693689cf1c22.png)
证明:如图(2),取EF的中点G,连接AG,∵四边形BCAD是矩形,∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febeb45acb37d201f3b2d6320554c151.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/832f83b52e897f5fa9c78a4634fe65be.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/15/f0721e23-ee5a-48f1-88df-fd1e0eb39add.png?resizew=433)
(1)任务一:上面证明过程中得出“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78917334e28fb7dbf45f7dceb80f05a0.png)
(2)任务二:完成材料证明中的剩余部分;
(3)任务三:如图(3),在矩形ABCD中,对角线AC的延长线与∠CBE的平分线交于点F,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6329501086821a1973319c43159036ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60572975f9ac06ffc8d98ef94de49eb0.png)
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【推荐3】【问题呈现】数学兴趣小组遇到这样一个问题:如图①,
是
的半径,
.点P在
上,将点P沿
的方向平移到点Q,使
.当点P在
上运动一周时,试探究点Q的运动路径.
【问题解决】经过讨论,小组同学想利用平行四边形的知识解决该问题:如图②,在线段
上截取
,连结
、
,由平行四边形的性质可推出点Q的运动路径是以点B为圆心、3为半径的圆.下面是部分证明过程:
证明:在线段
上截取
,连接
、
.
1°当点P在直线
外时,
2°当点P在直线
上时,
易知
.
综上,点Q的运动路径是以点B为圆心、3为半径的圆.
请你补全证明中缺失的过程.
【结论应用】在上述问题的条件下,记点M是线段
的中点,如图②.若点P在
上运动一周,则点M的运动路径长为 .
【拓展提升】如图③,在矩形
中,
,
.点P是平面内一点,
,将点P沿
的方向平移到点Q,使
.点M是线段
上的任意一点,连结
.设线段
长度的最大值为a,最小值为b,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb2d3f02cb9007cd4a90ea30f6dd8181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4d14c6959273338a048b023805cce80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
【问题解决】经过讨论,小组同学想利用平行四边形的知识解决该问题:如图②,在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48adbfaf2e97d0ca93a89449f76ed7cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
证明:在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48adbfaf2e97d0ca93a89449f76ed7cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
1°当点P在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
证明过程缺失 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
易知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e83bc42ac74441a08c9bd297199ba14.png)
综上,点Q的运动路径是以点B为圆心、3为半径的圆.
请你补全证明中缺失的过程.
【结论应用】在上述问题的条件下,记点M是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
【拓展提升】如图③,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98823cbc09ca52df1fbcc446eba3e44f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9e3f3f09715fd737324ea48c3696485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.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/892560dcff6af9f66a3f735652f69dd7.png)
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解答题-证明题
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较难
(0.4)
【推荐1】如图1,在
中,
,动点
从点
出发,沿折线
匀速运动至点
停止.若点
的运动速度为
,设点
的运动时间为
.
的长度为
,
与
的函数图象如图2所示.
(1)当
恰好平分
时,求
的值;
(2)满足(1)的条件下,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ce6c8659bfef1f79b0796d500b924a5.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/bfd66776565f049eb453c14fcaf79234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3683bae59bc5de0cccc8011815c327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0af169e1a6c6c59af61c9d01f1d1dd26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb7e44684b34a330aa701da0de2f0391.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/8/485b99de-7f04-4de8-86f5-bdd4a0f1d393.png?resizew=294)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)满足(1)的条件下,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f7cb4620813c74a9322098e11c3f91a.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】如图,
为
的直径,
为弦
的中点,连接
并延长交弧
于点
,过点
作
,交
的延长线于点
.
![](https://img.xkw.com/dksih/QBM/2020/7/1/2496645483872256/2497220216922112/STEM/d25899b1-755f-4a52-874f-c10fb7416c71.png?resizew=256)
(1)求证:
是
的切线;
(2)连接
、
、
.填空
①当
的度数为_______时,四边形
为菱形;
②当
时,四边形
的面积为_______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb73f854e7561c943b460e6c84e26fb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2020/7/1/2496645483872256/2497220216922112/STEM/d25899b1-755f-4a52-874f-c10fb7416c71.png?resizew=256)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a037c23a11c7783b1b44988c21634f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8735e2de0ec29640d1eff9e043556030.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed9463a829d3abf7935bc072d6a894d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9d54cbbf601f4583659771eb534997.png)
您最近一年使用:0次