【问题情景】
含
角的直角三角板
中
.将其绕直角顶点C顺时针旋转α角
,得到
,边
与边AB交于点D.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/2/4d77b68e-56e2-4964-9d1c-ee6d4a4a5e3c.png?resizew=486)
(1)如图1,若
边经过点B,则α的度数为 °;
(2)【探究发现】
如图2是旋转过程的一个位置,过点D作
交
边于点E,连接
,小明发现在三角板旋转的过程中,
度数是定值,求
的度数;
(3)【拓展延伸】
在(2)的条件下,设
,
的面积为S,当
时,
①求
的长;
②以点E为圆心,
为半径作
,并判断此时直线
与
的位置关系.
含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ab1f120ed7f249b68eb5b250b8df701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bfaab8aaefd34bdabd920e47a2c6493.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/2/4d77b68e-56e2-4964-9d1c-ee6d4a4a5e3c.png?resizew=486)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb0628cecbfc98d390e5447d52414e8.png)
(2)【探究发现】
如图2是旋转过程的一个位置,过点D作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0468e97f7cd9e956dc5341d379dfcb03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffb952f86442845da723fd291564484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d29e7c4d6216690152430b09f9cf0c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d29e7c4d6216690152430b09f9cf0c2.png)
(3)【拓展延伸】
在(2)的条件下,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15514bc735fe4b744672edefe00009c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9be69438f8441272affa196b42906a44.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
②以点E为圆心,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d5ab74296abcbcf994c02b5834cd699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d5ab74296abcbcf994c02b5834cd699.png)
2023·陕西渭南·一模 查看更多[3]
更新时间:2023-03-30 22:52:52
|
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】如图,在半径为5的
中,
为
的直径,
⊥弦
交
于D,垂足是H,
交
于E,过点E作
交
于F,且
,连接
.
(1)求证:
;
(2)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](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/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bfc4d81db95dfc925cd2a16a9f9ac3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0428fcbb93632fa00e2f8930e210ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8abf1c7dbea1028e282a01c7679c9489.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/16/cb327a8a-9655-42e5-a946-924c25d19674.jpg?resizew=142)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4dc17de4153a589cf47250faafc514f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3f515c607a8cfbfc03b0e3718c1863c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐2】已知梯形
中,
,
,
,
,
,
是
边上任意一点(不与
、
重合),联结
和
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/17/a210f47b-5beb-4ad1-864a-3527f4f1c752.png?resizew=294)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/17/a56b31dd-7a06-4f87-addd-6a671e2a5e0a.png?resizew=301)
(1)若
平分
,求
.
(2)若
是
中点,联结
和
,
①设
,
,求
关于
的函数解析式;
②若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af260e0d98c95d1e092dc4c6d348e3ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65fc998d33cdf37c272f79cfd64b7b99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf7679c8b4b1e442ce4286d4b0e9c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/17/a210f47b-5beb-4ad1-864a-3527f4f1c752.png?resizew=294)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/17/a56b31dd-7a06-4f87-addd-6a671e2a5e0a.png?resizew=301)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb3de20ba8bda63c650ef571be155702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
①设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c29bf5a05dd46f6e03dfd22c32f7ce1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f33ae0fcbd9988082ee4d2db16337f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc91d24995f16acfb67b775805c9821a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐3】如图,在平面直角坐标系中,直线l的解析式为y=﹣
x+4,与x轴交于点C,∠BCO=30°.直线l上有一点B的横坐标为
,点A是OC的中点.
(1)求直线AB的函数表达式;
(2)在直线AB上有两点P,Q(P在Q的上方),且PQ=2
,当△OPQ的周长最小时,点P沿适当的路径到达x轴上的点M,再沿x轴正方向到达点C,求PM+
CM的最小值;
(3)直线AB与y轴交于点H.将△OBH沿AB翻折得到△HBG,M为直线AB上一动点,N为平面内一点,是否存在这样的点M、N,使得以H、M、N、G为顶点的四边形是菱形,若存在,直接写出点N的坐标,若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca4d9ff190d74979422dae71751c6fba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c3f8c3ba00c59e0634ed10fa85289de.png)
(1)求直线AB的函数表达式;
(2)在直线AB上有两点P,Q(P在Q的上方),且PQ=2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c3f8c3ba00c59e0634ed10fa85289de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eff998d034284391ca064755fa6bf1b.png)
(3)直线AB与y轴交于点H.将△OBH沿AB翻折得到△HBG,M为直线AB上一动点,N为平面内一点,是否存在这样的点M、N,使得以H、M、N、G为顶点的四边形是菱形,若存在,直接写出点N的坐标,若不存在,说明理由.
![](https://img.xkw.com/dksih/QBM/2021/6/16/2744002588319744/2782451886891008/STEM/f31fa34206c1482cb19b714a2e708e6f.png?resizew=537)
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,在平行四边形ABCD中,AC是对角线,∠CAB=90°,以点A为圆心,以AB的长为半径作⊙A,交BC边于点E,交AC于点F,连接DE.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/26/6e729941-0ea8-4ba2-8974-9fdf05913679.png?resizew=154)
(1)求证:DE与⊙A相切;
(2)若∠ABC=60°,AB=4,求阴影部分的面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/26/6e729941-0ea8-4ba2-8974-9fdf05913679.png?resizew=154)
(1)求证:DE与⊙A相切;
(2)若∠ABC=60°,AB=4,求阴影部分的面积.
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】如图,以
为直径的
上有两点
、
,
,过点
作直线
交
的延长线于点
,交
的延长线于点
,过
作
平分
交
于点
,交
于点
.
是
的切线;
(2)求证:
;
(3)如果
是
的中点,且
,求
的长.
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4305f5c3d520ee9ce85650379d26a9bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70c5fd65265f85df7d149d83d80d4e62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/304bacefe6848156df2b6331e971c492.png)
(3)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a65a9571755a303d92ce65c55c33e2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4c865445dda4a59b6d5cb18fd74404.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】(1)观察猜想:如图①,在Rt△ABC和Rt△BDE中,∠ABC=∠EBD=90°,AB=BC,BE=BD,连接AE,点F是AE的中点,连接CD、BF,当点D、B、C三点共线时,线段CD与线段BF的数量关系是_____,位置关系是_____
(2)探究证明:在(1)的条件下,将Rt△BDE绕点B顺时针旋转至图②位置时,(1)中的结论是否仍然成立?如果成立,请你就图②的情形进行证明;如果不成立,请说明理由;
(3)拓展延伸:如图③,在Rt△ABC和Rt△BDE中,∠ABC=∠EBD=90°,BC=2AB=8,BD=2BE=4,连接AE,点F是AE的中点,连结CD、BF,将△BDE绕点B在平面内自由旋转,请直接写出BF的取值范围,
(2)探究证明:在(1)的条件下,将Rt△BDE绕点B顺时针旋转至图②位置时,(1)中的结论是否仍然成立?如果成立,请你就图②的情形进行证明;如果不成立,请说明理由;
(3)拓展延伸:如图③,在Rt△ABC和Rt△BDE中,∠ABC=∠EBD=90°,BC=2AB=8,BD=2BE=4,连接AE,点F是AE的中点,连结CD、BF,将△BDE绕点B在平面内自由旋转,请直接写出BF的取值范围,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/16/98ab959d-fa91-4a0d-bef4-cefa2224ec39.png?resizew=493)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】(1)如图1,△ABC中,∠BAC=90°,AB=AC,D,E在BC上,∠DAE=45°,为了探究BD,DE,CE之间的等量关系,现将△AEC绕A顺时针旋转90°后成△AFB,连接DF,经探究,你所得到的BD,DE,CE之间的等量关系式是_______;(无须证明)
(2)如图2,在△ABC中,∠BAC=120°,AB=AC,D,E在BC上,∠DAE=60°,∠ADE=45°,试仿照(1)的方法,利用图形的旋转变换,探究BD,DE,CE之间的等量关系,并证明你的结论.
(2)如图2,在△ABC中,∠BAC=120°,AB=AC,D,E在BC上,∠DAE=60°,∠ADE=45°,试仿照(1)的方法,利用图形的旋转变换,探究BD,DE,CE之间的等量关系,并证明你的结论.
![](https://img.xkw.com/dksih/QBM/2019/1/27/2127621781028864/2139854163582976/STEM/3877cdd6-0647-4815-a712-c6e9934890d5.png?resizew=324)
您最近一年使用:0次
解答题-作图题
|
较难
(0.4)
【推荐1】如图,等边△ABC中,点D在AC上(CD<
AC),连接BD.操作:以A为圆心,AD长为半径画弧,交BD于点E,连接AE.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/6/2d5c897f-0062-4c18-8ff2-75442001b9df.png?resizew=145)
(1)请补全图形,探究∠BAE、∠CBD之间的数量关系,并证明你的结论;
(2)把BD绕点D顺时针旋转60°,交AE于点F,若EF=mAF,求
的值(用含m的式子表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/6/2d5c897f-0062-4c18-8ff2-75442001b9df.png?resizew=145)
(1)请补全图形,探究∠BAE、∠CBD之间的数量关系,并证明你的结论;
(2)把BD绕点D顺时针旋转60°,交AE于点F,若EF=mAF,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810f9b4c1535bf75de1e31c164ccfe1e.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
解题方法
【推荐2】问题背景:
如图1,在
中,
,
,
是
边上的中线,E是
上一点,将
绕点C逆时针旋转
得到
,
的延长线交边
于点P.问题探究:
![](https://img.xkw.com/dksih/QBM/2022/1/17/2896605061906432/2935929912516608/STEM/cd90f2b6-810e-48ac-ba21-920b2f838d17.png?resizew=1063)
(1)探究
,
之和与
之间的数量关系.
①先将问题特殊化,如图2,当
时,直接写出
,
之和与
之间的数量关系;
②再探究一般情形,如图1,当
不垂直
时,证明①中的结论仍然成立;
(2)拓展探究:如图3,若
的延长线交
的延长线于点P时,直接写出一个等式,表示
,
,
之间的数量关系.
如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/031852844b65eb8c3be10fcb6ed11196.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4ce3f962c91f0d3c7b998b5fbb37b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://img.xkw.com/dksih/QBM/2022/1/17/2896605061906432/2935929912516608/STEM/cd90f2b6-810e-48ac-ba21-920b2f838d17.png?resizew=1063)
(1)探究
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c2293f93791a597bf0162411f3395f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
①先将问题特殊化,如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497846628a41a9bc750a645e045afb47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c2293f93791a597bf0162411f3395f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
②再探究一般情形,如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)拓展探究:如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c2293f93791a597bf0162411f3395f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
您最近一年使用:0次