名校
解题方法
1 . 设
,
,
为不重合的平面,
,
为不重合的直线,则下列说法正确的序号为( )
①
,
,则
;
②
,
,
,则
;
③
,
,
,则
;
④
,
,
,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d35a45cfcdfbda18b089ce6698ccdbcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b82e5d28e2e5a4790e94db2daa6a07c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/202af51f5ebe87ec0017f439a6ad7fbf.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe920cd78db25f5b4df37d066e57800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a53cd751c44ad4d9ebd8e3243e751321.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b6e422b2e6f6dada4d8c369559a077.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5986f2991d45fbf3578f08f27d9fd7e.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5986f2991d45fbf3578f08f27d9fd7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce3bdd7a1a12d66a8b32e239fd6886a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b6e422b2e6f6dada4d8c369559a077.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1b610e3c5b3d78a5730e7f3d736ac28.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d35a45cfcdfbda18b089ce6698ccdbcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b82e5d28e2e5a4790e94db2daa6a07c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92c166c4d75211e5294eb440bf2a6350.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/008241f4c7f47526109c74c92ed21fdb.png)
A.①③ | B.②③ | C.②④ | D.③④ |
您最近一年使用:0次
2022-03-15更新
|
554次组卷
|
11卷引用:专题9.立体几何与空间向量 -《2022届复习必备-2021届浙江省高考冲刺数学试卷分项解析》
(已下线)专题9.立体几何与空间向量 -《2022届复习必备-2021届浙江省高考冲刺数学试卷分项解析》(已下线)考点16 空间向量与立体几何-2022年高考数学一轮复习小题多维练(新高考版)(已下线)2020年高考浙江数学高考真题变式题6-10题(已下线)热点06 空间位置关系的判断与证明-2022年高考数学【热点·重点·难点】专练(全国通用)天津市河西区2021-2022学年高三上学期期末数学试题陕西省西安中学2022-2023学年高二上学期第二次月考理科数学试题4.4.2 平面与平面垂直的性质浙江省北斗星盟2021届高三下学期5月适应性联考数学试题江苏省镇江市第一中学2021-2022学年高二上学期期中数学试题(已下线)第15课时 课中 平面与平面垂直的性质(已下线)8.6空间直线、平面的垂直A卷
解题方法
2 . 如图,在棱长为2的正方体
中,点M在线段
(不包含端点)上运动,则下列4个命题中所有正确命题的序号为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/14/d650b741-bd5e-4d45-8d28-b0924590a947.png?resizew=167)
①异面直线
与
所成角的取值范围是
;
②
;
③三棱锥
的体积为定值
;
④
的最小值为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/14/d650b741-bd5e-4d45-8d28-b0924590a947.png?resizew=167)
①异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9399c9a2a31b0e3165aea2d6ccc4f7c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c09eec4e14a861af83d7828797d176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bc08d14fe6bc48674b8c3b2d464fc88.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99ba3d4adb389c1d4ae5b742372440d5.png)
③三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6557d0725272b008c5969c0a203aa10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d599cb4a589f90b0205f24c2e1fa021e.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82aeb9ae6660cf9bd7b2f57ff4a47ef4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfba144ad36e04d7032e30b08413cda3.png)
A.②④ | B.①④ | C.②③④ | D.①③ |
您最近一年使用:0次
解题方法
3 . 如图,在直三棱柱ABC﹣A1B1C1中,底面ABC为等边三角形,O为AC1与A1C的交点,D为AB的中点,则下列结论:①DO
平面ABC1;②DO
平面A1BC1;③DC⊥平面ABB1A1;④DC⊥平面ABC1.其中所有正确结论的序号为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/15e0723d-2db8-4b52-961b-01ed1a96db71.png?resizew=121)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/15e0723d-2db8-4b52-961b-01ed1a96db71.png?resizew=121)
A.①② | B.①③ | C.②③ | D.②④ |
您最近一年使用:0次
4 . 如图,在正方体
中,
、
、
分别为线段
、
、
的中点,下述四个结论:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/380cf2d1-93a8-4d36-be72-3fe8d216bfe1.png?resizew=179)
①直线
、
、
共点;
②直线
、
为异面直线;
③四面体
的体积为
;
④线段
上存在一点
使得直线
平面
.
其中所有正确结论的序号为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.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/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/380cf2d1-93a8-4d36-be72-3fe8d216bfe1.png?resizew=179)
①直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
②直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48ad8115387158c8dda205d26968ba11.png)
③四面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e6486784415f3537c9a13556c05d893.png)
④线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31c34b18525831f3eda7bb90be0199b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae39b47a4da24a0647620f09fd0029c0.png)
其中所有正确结论的序号为( )
A.① | B.①② | C.①③ | D.①②③ |
您最近一年使用:0次
5 . 如图,E是正方体ABCD-A1B1C1D1棱DD1的中点,F是棱B1C1上的动点,现有下列命题:①存在点F使得CF⊥EB;②存在点F使得D1F//BE;③存在点F使得△BEF的正视图和侧视图的面积相等;④四面体EBFC的体积为定值.其中所有正确命题的序号为( )
![](https://img.xkw.com/dksih/QBM/2021/9/16/2809487997706240/2815193386328064/STEM/6fc43cd4-8137-4e16-8033-312c8968d4c0.png?resizew=329)
![](https://img.xkw.com/dksih/QBM/2021/9/16/2809487997706240/2815193386328064/STEM/6fc43cd4-8137-4e16-8033-312c8968d4c0.png?resizew=329)
A.①③④ | B.①③ | C.③④ | D.①②④ |
您最近一年使用:0次
名校
6 . 已知正方体
,过对角线
作平面
交棱
于点E,交棱
于点F,则:
①平面
分正方体所得两部分的体积相等;
②四边形
一定是平行四边形;
③平面
与平面
不可能垂直;
④四边形
的面积有最大值.
其中所有正确结论的序号为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
①平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
②四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef5ea43614d815c3abb27a42dfb101b.png)
③平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1477ae90a240deba97f8dadf4d7c41aa.png)
④四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef5ea43614d815c3abb27a42dfb101b.png)
其中所有正确结论的序号为( )
A.①④ | B.②③ | C.①②④ | D.①②③④ |
您最近一年使用:0次
2020-03-04更新
|
803次组卷
|
6卷引用:专题07立体几何线面位置关系(测)(文科)第一篇 热点、难点突破篇-《2022年高考文科数学二轮复习讲练测》(全国课标版)
(已下线)专题07立体几何线面位置关系(测)(文科)第一篇 热点、难点突破篇-《2022年高考文科数学二轮复习讲练测》(全国课标版)广西桂林普通高中2022届高三1月教学质量检测数学(理)试题(已下线)专题07立体几何线面位置关系(测)(理科)第一篇 热点、难点突破篇-《2022年高考理科数学二轮复习讲练测》(全国课标版)2020届安徽省合肥市高三第一次教学质量检测数学(理)试题2020届湖北省华师一附中高三2月月考数学(理)试题广东省番禺区2020届高三摸底测试理科数学试题
名校
7 . 已知
为两条不同直线,
为三个不同平面,下列命题:①若
,
,则
;②若
,
,则
;③若
,
,则
;④若
,
,则
.其中正确命题序号为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b15bd315b801f71bc30b8d772098614.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7b215a2b3a2282ce790998ebaa2c34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35f747152f006301e03b643afb80195c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39e81e2fae4bf226cb0311850199f50d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/229ad7ff99f02612a2647de5986f7471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d6a7aec04e1d5768ef830b534460a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/542a1572078188c8fbe82ebddf8af3ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35f747152f006301e03b643afb80195c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d35a45cfcdfbda18b089ce6698ccdbcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b82e5d28e2e5a4790e94db2daa6a07c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5986f2991d45fbf3578f08f27d9fd7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/675f1e09eb033dab8ef96d1f1c349150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/187f7895012551f2067f0b77d8df2141.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72fbc714c63815dad9a27418f6492f16.png)
A.②③ | B.②③④ | C.①④ | D.①②③ |
您最近一年使用:0次
2020-09-02更新
|
904次组卷
|
15卷引用:专题8.3 空间点、直线、平面之间的位置关系(练)- 2022年高考数学一轮复习讲练测(新教材新高考)
(已下线)专题8.3 空间点、直线、平面之间的位置关系(练)- 2022年高考数学一轮复习讲练测(新教材新高考)(已下线)第32讲 平面的基本性质与推论-2021年新高考数学一轮专题复习(新高考专版)(已下线)专题8.3 空间点、直线、平面之间的位置关系(精练)-2021年新高考数学一轮复习学与练(已下线)专题8.3 空间点、直线、平面之间的位置关系(练)-2021年新高考数学一轮复习讲练测新疆喀什市普通高中2022届高三上学期期末考试数学(理)试题新疆喀什市普通高中2022届高三上学期期末考试数学(文)试题2020届陕西省咸阳市高三下学期第二次模拟考试数学(理)试题2020届陕西省咸阳市高三下学期第二次模拟考试数学(文)试题四川省成都市第七中学高中2020届高三高中毕业班三诊模拟数学(理科)试题四川省成都市第七中学2020届高三高中毕业班三诊模拟数学(文科)试题甘肃省武威第六中学2020届高三下学期第六次诊断考试数学(理)试题安徽省阜阳市太和第一中学2020-2021学年高二(奥赛班)上学期开学考试数学试题甘肃省天水市第一中学2020-2021学年高三下学期第九次模考数学(理)试题2021届甘肃省天水市第一中学高三第九次模拟数学(文)试题江西省九江市第三中学2020-2021学年高一下学期期中考试数学(文)试题
名校
解题方法
8 . 如图,点
为正方形
边
上异于点
的动点,将
沿
翻折,得到如图所示的四棱锥
,且平面
平面
,点
为线段
上异于点
的动点,则在四棱锥
中,下列说法:
①直线
与直线
必不在同一平面上;
②存在点
使得直线
平面
;
③存在点
使得直线
与平面
平行;
④存在点
使得直线
与直线
垂直.
以上叙述正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da6b93dbe5272a5167ff4e2918bec864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99be23ddbd80e2c75649e3d1f8594130.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/036a0d3b3c70d41060bc441ddd8003fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6bfad3f7e65188bcf7f62ea5acdbf4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8f90eb172dbd2ff7ae6f705801c0737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99be23ddbd80e2c75649e3d1f8594130.png)
①直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
②存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662698361c6b3ddaf0c28a3c87be53e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/422210c777ac0d625bbd81cc7601bf9b.png)
③存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23ba3f676fda6a2aaaa55c9f32874a51.png)
④存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
以上叙述正确的是( )
A.①② | B.①③ | C.①④ | D.③④ |
您最近一年使用:0次
9 . 设
是互不重合的平面,m,n是互不重合的直线,给出下面四个说法:
①若
,
,则
;
②若
,
,则
;
③若
,
,则
;
④若
,
,
,则
.
其中所有错误说法的序号是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61ba63ad02b1d5af2982fac3d91eb15c.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28cee4d8d2c3ef579fe3aa2f579ad269.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b82e5d28e2e5a4790e94db2daa6a07c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5986f2991d45fbf3578f08f27d9fd7e.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe920cd78db25f5b4df37d066e57800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1b610e3c5b3d78a5730e7f3d736ac28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35f747152f006301e03b643afb80195c.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4042f9c51f83e3367d496e851735d7f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b59b1a01a6da42ff2a41e5b91ea301ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a93a52c2b943e4c70ace99ed802d2b5.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5986f2991d45fbf3578f08f27d9fd7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92c166c4d75211e5294eb440bf2a6350.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39344e476725f3fbae35f2e73377a38b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a53cd751c44ad4d9ebd8e3243e751321.png)
其中所有错误说法的序号是( )
A.①③ | B.①④ | C.①③④ | D.②③④ |
您最近一年使用:0次
10 . 如图,等腰直角三角形
的斜边
为正四面体
的侧棱,
直角边
绕斜边
旋转一周,在旋转的过程中,有下列说法:
![](https://img.xkw.com/dksih/QBM/2021/11/1/2841770020675584/2841804122144768/STEM/2b9e5747-b018-4859-8a58-e36efc41b097.png?resizew=223)
①三棱锥
体积的最大值为
,
②三棱锥
体积的最小值为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/345d4d7d64d96f835e88b3de3bb0ec91.png)
③存在某个位置,使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c51c25b65a37b676ae3c3b71c29f9b.png)
④设二面角
的平面角为
,且
,则
.
其中所有正确说法的序号是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbbb48c435c1ea5452cd9c9dd05e53ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2021/11/1/2841770020675584/2841804122144768/STEM/2b9e5747-b018-4859-8a58-e36efc41b097.png?resizew=223)
①三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42020cfacd62b300cad053981bab9e0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99790fada481e8b0a4b114b823542a78.png)
②三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42020cfacd62b300cad053981bab9e0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/345d4d7d64d96f835e88b3de3bb0ec91.png)
③存在某个位置,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c51c25b65a37b676ae3c3b71c29f9b.png)
④设二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d87b527147cb8dbb475bcefc0da2e6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dcadd1781ee9177e9bc76ce48afdd0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8abb81a7b51de6e6293064ecf98e0759.png)
其中所有正确说法的序号是( )
A.①③ | B.①④ | C.②③ | D.②④ |
您最近一年使用:0次