如图所示,某景区拟在矩形
的空地上建造一个含“内接平行四边形
”的花坛.平行四边形
四个顶点
、
、
、
分别在矩形
四条边
、
、
、
上.已知
,
,为增加美感,要求
.设
,平行四边形
的面积为
.
与
的函数关系式;
(2)景区准备在平行四边形
内种植“郁金香”,四个三角形内种植“红玫瑰”.已知“郁金香”的价格为20元
,“红玫瑰”的价格为40元
.若景区购买两种花卉的预算不超过1800元,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49caee3119b29a99e62cbe419fb261fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614c45b20f915ed6975e41a6ed23e3e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/043fdc560f1deee9babfdbbcb6992797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34a45752e1e5e3679ecd6bf8bc5d3a91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baaa2d65026770c5505f8adeb450e43b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)景区准备在平行四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c064df1f1b8998fa38e0c3dfa7de993.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c064df1f1b8998fa38e0c3dfa7de993.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
更新时间:2024-05-17 10:44:28
|
相似题推荐
解答题-应用题
|
适中
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【推荐1】在美化校园的活动中,某兴趣小组借助如图所示的直角墙角(墙角两边
和
足够长),用
长的篱笆刚好围成一个矩形花园
(篱笆只围
和
两边).设
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/21/bd08e7ef-e526-41b0-8f2b-931b6019b47b.jpg?resizew=183)
(1)求y与x之间的关系式,并写出自变量的取值范围;
(2)当矩形花园的面积为
时,求
的长;
(3)如果在点P处有一棵树(不考虑粗细),它与墙
和
的距离分别是
和
,如果要将这棵树围在矩形花园内部(含边界,即
,
),当
__________
,矩形花园面积最大,最大值是__________
.(直接写出答案)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf2fc57da7f8399eae9ad9ad22ca836.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66ac400e3f5ba8b945bbef83db8611b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41a2f3d57e6e949964ca7a4085ca760a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/21/bd08e7ef-e526-41b0-8f2b-931b6019b47b.jpg?resizew=183)
(1)求y与x之间的关系式,并写出自变量的取值范围;
(2)当矩形花园的面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6307c0249ba768c1c0c9a253c31720d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)如果在点P处有一棵树(不考虑粗细),它与墙
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b749f9acb5f0de709a1709bbdd42614.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e17ee14bd91bfff409c06fd434f6745.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95d0ebed56b9f99f57b0c36711ae865e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a75b731442c637e41150abb852b359e.png)
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【推荐2】
是一块锐角三角形材料,边
,高
,要把它加工成矩形零件
,使矩形的一边
在
上,其余两个顶点
、
在
,
上,
![](https://img.xkw.com/dksih/QBM/2018/12/24/2103749021859840/2105089282924544/STEM/158294f2b2164dedb03d6672af42d4fc.png?resizew=135)
求证:
;
设
,
,用含
的代数式表示
;
设矩形
的面积是
,求当
为何值时
有最大值.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://img.xkw.com/dksih/QBM/2018/12/24/2103749021859840/2105089282924544/STEM/158294f2b2164dedb03d6672af42d4fc.png?resizew=135)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
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名校
【推荐1】受疫情影响,从保障学生健康安全出发,学校规定每位学生进入学校需进行体温检测.经过调查发现学生错峰进入校园的累计人数y(人)与时间x(分钟)变化情况满足函数:
.
(1)如果学生一进学校就开始测量体温,体温检测点有2个,每个检测点每分钟检测20人,学生排队测量体温,求排队人数最多时有多少人?全部学生都完成体温检测需要多少时间?(排队人数=累计人数﹣已检测人数)
(2)在(1)的条件下,如果要在15分钟内让全部学生完成体温检测,从一开始就应该至少增加几个检测点?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28ff75e3d9d27b61f4fcf16c04fd41ab.png)
(1)如果学生一进学校就开始测量体温,体温检测点有2个,每个检测点每分钟检测20人,学生排队测量体温,求排队人数最多时有多少人?全部学生都完成体温检测需要多少时间?(排队人数=累计人数﹣已检测人数)
(2)在(1)的条件下,如果要在15分钟内让全部学生完成体温检测,从一开始就应该至少增加几个检测点?
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名校
【推荐2】在一条笔直的滑道上有黑、白两个小球同向运动,黑球在A处开始减速,此时白球在黑球前面
处.
小聪测量黑球减速后的运动速度
(单位:
)、运动距离
(单位:
)随运动时间
(单位:
)变化的数据,整理得下表.
小聪探究发现,黑球的运动速度
与运动时间
之间成一次函数关系,运动距离
与运动时间
之间成二次函数关系.
(1)求
关于
的函数解析式和
关于
的函数解析式(不要求写出自变量的取值范围);
(2)若白球一直以
的速度匀速运动,求两球之间距离
与运动时间
之间的关系式,判断并说明黑球在运动过程中会不会碰到白球.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d8789e1f6656c346853f226c08863e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/8/a7d537bc-696b-4540-8ab5-77a646061881.png?resizew=312)
小聪测量黑球减速后的运动速度
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc13a607ac0c7f76d252d7cb1bb040fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc1dce4a03cf2c9a68b2399d4339a035.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d65502a7ea4d1ce6d6d8c720845c73e0.png)
运动时间 | 0 | 1 | 2 | 3 | 4 |
运动速度 | 10 | 9.5 | 9 | 8.5 | 8 |
运动距离 | 0 | 9.75 | 19 | 27.75 | 36 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc13a607ac0c7f76d252d7cb1bb040fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc13a607ac0c7f76d252d7cb1bb040fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)若白球一直以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79789686104cab147c239d152271e076.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/595044a7750ab4f84519041979c3d780.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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【推荐3】随着北京冬奥会的成功举办,全国掀起了一股“冰雪热潮”,滑雪运动正成为一种新风尚,受到越来越多人的喜爱.铁岭市民李泓是一名业余滑雪选手,他正积极备战下个月张家口市崇礼区万龙站的滑雪比赛,比赛赛道坡面平整,坡角约
,赛道长约
.因训练条件受限,他在当地滑雪场找到了一条如下图所示的雪道进行训练,该雪道坡角
约
,坡面的铅直高度
约
.
![](https://img.xkw.com/dksih/QBM/2022/4/14/2957931648229376/2974405540446208/STEM/f0200f39-9599-42bf-a44b-601557e1c559.png?resizew=191)
为了预测比赛成绩,李泓在平时训练中对自己的滑行距离
(单位:
)与滑行时间
(单位:
)进行了多次测量,经统计获得如下数据(如表)并根据表中数据在平面直角坐标系中描出了2个点(如图).
![](https://img.xkw.com/dksih/QBM/2022/4/14/2957931648229376/2974405540446208/STEM/25e813db-9340-4f2c-83ff-222276478de8.png?resizew=233)
(1)求训练雪道
的长度;(
,
,
)
(2)李泓在该比赛赛道的最好成绩是
.若按照上述
与
的变化规律,请判断李泓在本次比赛中是否有可能超越自己的最好成绩?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aee6e4e9350a2665df8597ff8045bbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39bd3dc7313404634c61aa616f8d4369.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aee6e4e9350a2665df8597ff8045bbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e348a7db6a529aba356c35683406ce8.png)
![](https://img.xkw.com/dksih/QBM/2022/4/14/2957931648229376/2974405540446208/STEM/f0200f39-9599-42bf-a44b-601557e1c559.png?resizew=191)
为了预测比赛成绩,李泓在平时训练中对自己的滑行距离
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15e00f40396e914d1d9955bd7785f1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d65502a7ea4d1ce6d6d8c720845c73e0.png)
滑行时间![]() | 0 | 3 | 4 | 5 | 6 | 7 | 8 |
平均滑行距离![]() | 0 | 30 | 52 | 80 | 114 | 154 | 200 |
![](https://img.xkw.com/dksih/QBM/2022/4/14/2957931648229376/2974405540446208/STEM/25e813db-9340-4f2c-83ff-222276478de8.png?resizew=233)
(1)求训练雪道
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fac980ce194582899d857b5f6edd431e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/702e8d9602884d50948248734a1e1324.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2a0f8f5fabed2f1e761cd55660526c6.png)
(2)李泓在该比赛赛道的最好成绩是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33277b7c67da06afa48547cd8da24b85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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解答题-作图题
|
适中
(0.65)
【推荐1】如图,平行四边形ABCD中,点E是BC的中点,用无刻度的直尺按下列要求作图.
(2)在图2中,作边AB上的中点G.
(2)在图2中,作边AB上的中点G.
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解答题-证明题
|
适中
(0.65)
【推荐2】综合探究
如图,平行四边形
中,
,过A、B、C三点的
与
相交于点E,连接
.
(1)求证:
;
(2)求证:
与
相切;
(3)若
半径
,
,求
的值.
如图,平行四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/3/b55ab816-eac4-46ad-8098-ed2e60fd8150.png?resizew=153)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17101383eb0787edaaa35adfcd20d5c9.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8314bf44fd67afda08134a89cff2de72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.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
|
适中
(0.65)
【推荐1】如图,现有矩形
和一个含
内角的直角三角形
按图
所示位置放置
和
重合
,其中
,
将
绕点
顺时针旋转
,在旋转过程中,直线
与边
交于点
,如图
所示.
;
(2)连接
、
,当
时,求出此时
的度数;
(3)如图
,以
为边的矩形内部作正方形
,直角边
所在直线交线段
于点
,交
于点
设
,
,写出
关于
的函数解析式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c030b25575d683af91c06e6a3e4f463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1910c648c8bfa02218b2802f5bfbacfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48d2d32c994ceddf8abc46c7e0b1460e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1465c76d4b3d646e0aaa792e36eb765.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60defec633773b600fbf006b92e16ad0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de3a8deac36e5cdc2d67a0142b5326fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc78df175dcd39d752157d63e201ee88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f12f132f2b4cda3da38da6d124de419c.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25ebc9f31edaa9f1b70cec2b56354637.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3830a7db880839614a98b607430b2431.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa29fe6cd9eb51c184f6299d437375cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/588733fbcbe2c43c0f2a9e299e9c1ee2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43e424a3aa51a2a85a5829de09973363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28142ae2bd235707ae93985447f89aa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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,在矩形
中,对角线
相交于点O.
(1)求证:
.
(2)若点M是
的中点,仅用无刻度的直尺画图(不写画法,保留画图痕迹).
①画出边
的中点N;
②画出边
的垂直平分线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d578394cd8e4d7a705599269c512960.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/8/bd550166-70fd-41a1-ba98-3ecad174719c.png?resizew=187)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c8dbc31b2e14067ef2f34b4e25f114.png)
(2)若点M是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
①画出边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
②画出边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
您最近一年使用:0次