名校
1 . 向量外积(又称叉积)广泛应用于物理与数学领域.定义两个向量
与
的叉积
,规定
的模长为
,
与
、
所在平面垂直,其方向满足如图1所示规则,且须满足如图所示的排列顺序.已知向量外积满足分配律,且
.
;②
;
(2)空间直角坐标系中有向量
,
①若
,用含
的坐标表示
;
②
证明:
;
(3)如图2所示,平面直角坐标系
中有三角形OAB,
,试探究
的表达式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e4b78561c1b513a90122730a126d585.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a0b19e69be46452425916a0fcb49c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dcf3f31d18fa318e4f947d331ddd229.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a0b19e69be46452425916a0fcb49c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a4813c1052e3e1a7f229c85156c61b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bb30a9b89b6310c560c56a79a9bdb30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f92fe31d138472bc7f4b99050b97007f.png)
(2)空间直角坐标系中有向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af4e5a239ec34b9dd46a8b9518f86658.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ea61e69fd7a319942f48082c341ac2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cb17664b1f6e969b1cf22e95cef9075.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a0b19e69be46452425916a0fcb49c9.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b3680f37d3a0a5fb8038213ccf33f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d641794c36b9ab43f9dc5ba02a0f65ef.png)
(3)如图2所示,平面直角坐标系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de77ee0b176035fd3a89edc2ad957a77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a711bf44ed64556c72fbb0e7f42c27f.png)
您最近一年使用:0次
2 . 如图,四棱锥
中,
为等腰直角三角形,四边形
为菱形,
,
,E,F分别为CD,PD的中点,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/ffd3d4c6-eb41-4062-b7d8-e3ef22793ba1.png?resizew=149)
(1)求证:
;
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f14f698605a196cf83ccba6a601d0e2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05740f0c6071846227dc0ec177ad15e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/ffd3d4c6-eb41-4062-b7d8-e3ef22793ba1.png?resizew=149)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab00e0cff0876c4183a47f1272cf9928.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
3 . 已知空间中三点
,
,
.设
,
.
(1)求
和
;
(2)若
与
互相垂直,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe15cbb36e4dc28106343ffcbe7cc65d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0378a859d622e2fdb8bd728b49e52c40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02ffba0bab7e115d89e400abd68770ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d458bed4c0f3e91667eb8705c9c90d99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/415c6484536cc61efd5529fcb0b15eb9.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67a5673958e175b00200a75e645c73c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de0212ab68627919b1d22ac348a3e849.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afa3c16cbfc294580a7c90884ff4dbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9441846da0868582298cece138bec3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2023-12-20更新
|
347次组卷
|
2卷引用:湖北省武汉市新洲区部分学校2023-2024学年高二上学期期中质量检测数学试题
名校
4 . 空间中,两两互相垂直且有公共原点的三条数轴构成直角坐标系.如果坐标系中有两条坐标轴不垂直,那么这样的坐标系称为“斜坐标系”.现有一种空间斜坐标系,它任意两条数轴的夹角均为
,我们将这种坐标系称为“斜
坐标系”.我们类比空间直角坐标系,定义“空间斜
坐标系”下向量的斜
坐标:
分别为“斜
坐标系”下三条数轴(
轴,
轴,
轴)正方向上的单位向量,若向量
,则
与有序实数组
一一对应,称向量
的斜
坐标为
,记作
.
(1)若
,求
的斜
坐标;
(2)在平行六面体
中,
,建立“空间斜
坐标系”如下图所示.
①若
,求向量
的斜
坐标;
②若
,且
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4664eed9e1abab0ed6397c58d70e731.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.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/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/138c39673b579f1346c38398811105a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1b8a88a16125366536cb4ad658e0cf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee4e3cf72016a2b908b9178b8317b84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1b8a88a16125366536cb4ad658e0cf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee4e3cf72016a2b908b9178b8317b84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971975007772deb92f837127a7936389.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9fe31c74115f017c61dc7e6d78d5fac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9cd8bbf47b69bbd7a6263b041290d11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
(2)在平行六面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a96b1713aa3c420848e9865afefa3fb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/27/30f606bc-c728-4798-a6d6-a33bb22e85bf.png?resizew=181)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/099edd3520292558184521a9af4e9064.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/253b99b8c8a45ace50b590cdd89b238a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bcc897340d513ba62e60b02e5ede30a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59cbb23e8edee78010195fe66d3e55b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5813dd9f2bd01a38d749247eccca5449.png)
您最近一年使用:0次
2023-10-10更新
|
183次组卷
|
3卷引用:湖北省宜荆荆随2023-2024学年高二上学期10月联考数学试题
名校
5 . 已知空间中三点
.
(1)已知向量
与
互相垂直,求
的值;
(2)求以
为邻边的平行四边形的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b62b23f10d1226b9ab1258983e058f4.png)
(1)已知向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf17e89d8eba3213a551b9b43ec3d6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5f1b06a56fc382feed28e01f1ad102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)求以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
您最近一年使用:0次
2023-12-10更新
|
240次组卷
|
3卷引用:湖北省云梦县黄香高级中学2021-2022学年高二上学期期末数学试题
湖北省云梦县黄香高级中学2021-2022学年高二上学期期末数学试题四川省成都市玉林中学2023-2024学年高二上学期期末模拟数学试题(三)(已下线)专题12 空间向量的坐标表示8种常见考法归类-【寒假自学课】2024年高二数学寒假提升学与练(苏教版2019)
名校
解题方法
6 . 斜三棱柱
的各棱长都为
,点
在下底面
的投影为
的中点
.
(1)在棱
(含端点)上是否存在一点
使
?若存在,求出
的长;若不存在,请说明理由;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27a878ed00f28b1e57cbe88f5f352ecd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/29/52072aba-57fa-4150-8280-c074bdb79ae6.png?resizew=145)
(1)在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43c53cee325b734f115aef70efdae3dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
您最近一年使用:0次
2023-05-27更新
|
723次组卷
|
6卷引用:湖北省襄阳市第四中学2023届高三下学期高考适应性考试数学试题
湖北省襄阳市第四中学2023届高三下学期高考适应性考试数学试题湖南省长沙市雅礼中学2023届高三一模数学试题(已下线)重难点突破06 立体几何解答题最全归纳总结(九大题型)-1(已下线)考点13 立体几何中的探究问题 2024届高考数学考点总动员【练】(已下线)专题1-3 空间向量综合:斜棱柱、不规则几何体建系计算(讲+练)-【巅峰课堂】2023-2024学年高二数学热点题型归纳与培优练(人教A版2019选择性必修第一册)(已下线)模块二 专题2 利用空间向量解决不方便建立坐标系的方法 期末终极研习室(高二人教A版)
名校
解题方法
7 . 如图,已知四棱台
的上、下底面分别是边长为2和4的正方形,
,且
底面
,点P,Q分别在棱
、
上.
(1)若P是
的中点,证明:
;
(2)若
平面
,二面角
的余弦值为
,求四面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1880586c33da315e49ccb6e2d531c6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ecf072589c0f901d92f6bda111d841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/d2d8ba32-a1ad-43a5-a115-92136e4a2520.png?resizew=151)
(1)若P是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63e5b64f90a420f867e826e8dbef2239.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9abe6e8d1f4f1e8bdc46ddbae0cd789.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e866091156cbd7beea724fbbdb25082.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d86ab7c97cd8a0b15ba5efc1be94230.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c7bce6eba5d07a34f24c5370c580ac7.png)
您最近一年使用:0次
2023-12-17更新
|
1054次组卷
|
20卷引用:湖北省恩施州巴东县第一高级中学2023-2024学年高二上学期末数学试题
湖北省恩施州巴东县第一高级中学2023-2024学年高二上学期末数学试题湖南省炎德英才2022届高三上学期12月联考数学试题重庆市南开中学2022届高三上学期12月月考数学试题湖南省名校联合体2021-2022学年高三上学期12月联考数学试题安徽省亳州市第一中学2021-2022学年高二上学期期末检测数学试题湖南师范大学附属中学2021-2022学年高三上学期12月联考数学试题(已下线)第03讲 空间向量的应用-【帮课堂】2021-2022学年高二数学同步精品讲义(苏教版2019选择性必修第二册)江苏省宿迁市沭阳如东中学2022-2023学年高三上学期9月阶段测试(三)数学试题(已下线)专题19 空间几何解答题(理科)-1江苏省南通市海门中学2022-2023学年高二下学期6月学情调研数学试题广东省博罗县2023-2024学年高二上学期期中数学试题广东省佛山市顺德区华侨中学2024届高三上学期12月月考数学试题四川省泸州市泸县第四中学2023-2024学年高二上学期12月月考数学试题湖南省长沙市湖南师大附中2024届高三上学期月考(四)数学试题(已下线)每日一题 第5题 面面夹角 运用向量(高二)山东省德州市第一中学2024届高三上学期1月月考数学试题(已下线)专题13 空间向量的应用10种常见考法归类(2)四川省德阳市2024届高三下学期质量监测考试(二)数学(理科)试卷(已下线)专题15 立体几何解答题全归类(9大核心考点)(讲义)-1(已下线)黄金卷02
名校
解题方法
8 . 如图,已知边长为6的菱形
与
相交于
,将菱形
沿对角线
折起,使
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/19/a2833a4f-d877-4e6b-b182-5ddf91e9d364.png?resizew=392)
(1)求平面
与平面
的夹角的余弦值;
(2)在三棱锥
中,设点
是
上的一个动点,试确定
点的位置,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be9497bbc329867413f0ded7b55dc6ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57abb19d63cad8f06c62f2ed75d70dce.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/19/a2833a4f-d877-4e6b-b182-5ddf91e9d364.png?resizew=392)
(1)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e648c9ff4284df8551f924e34e00c131.png)
(2)在三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64d9ebeeefbd4bd27023709d01b5dc95.png)
您最近一年使用:0次
名校
9 . 已知
,
.
(1)求
与
夹角的余弦值;
(2)当
时,求实数k的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870e2ff0e28bb5d44196d16969496db1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c0caf6edfa3e0dbca0de9ec7d79c230.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64393ce2d8bf4c121a62622f9d41b156.png)
您最近一年使用:0次
2023-03-01更新
|
482次组卷
|
8卷引用:湖北省武汉市华中科技大学附属中学2022-2023学年高二上学期9月月考数学试题
解题方法
10 . 解答下列问题:
(1)已知向量
,求
在
上的投影向量的模.
(2)已知双曲线
的右焦点为
,以
为圆心,
为半径作圆
,圆
与双曲线
的一条渐近线交于
,
两点.若
,求双曲线
的离心率的取值范围.
(1)已知向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c33543396b016110547114a1a1814f14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb5d89b04570ceda2c29e11cb27a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5f1b06a56fc382feed28e01f1ad102.png)
(2)已知双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf4fd84818abac17a9d21237ac5ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/ed3e3198e6b00b085ad3f93cb9207875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
您最近一年使用:0次