名校
解题方法
1 . 如图,在四面体
中,
,
,
、
分别为
、
的中点,
,则异面直线
与
所成的角是_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e46571701ccaa18d3c844ab99ee6c30e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33c096bd244d7e30e8ef26fb5278aac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/28/a085b2a1-301f-47ba-9ab5-4bc37dad08fb.png?resizew=192)
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2022-06-27更新
|
943次组卷
|
6卷引用:江苏省南通市海安高级中学2022-2023学年高一下学期期中数学试题
名校
解题方法
2 . 在棱长为2的正方体
中,E,F分别是棱AB,BC上的动点,且
,
,
,则( )
![](https://img.xkw.com/dksih/QBM/2022/5/29/2990018074083328/2991416317591552/STEM/96e25029f2c9405eaa1a56156f25822a.png?resizew=234)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10f322f8f148fbbaa38b6c0218ae68fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a768113d267443c7224089fd909cc3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eb6bf23a5a12e1ba5413594d7b1a57c.png)
![](https://img.xkw.com/dksih/QBM/2022/5/29/2990018074083328/2991416317591552/STEM/96e25029f2c9405eaa1a56156f25822a.png?resizew=234)
A.当![]() ![]() |
B.当![]() ![]() ![]() ![]() |
C.三棱锥![]() |
D.不论![]() ![]() |
您最近一年使用:0次
2022-05-31更新
|
619次组卷
|
4卷引用:江苏省南通市通州区金沙中学2022-2023学年高二下学期5月学业水平质量调研数学试题
名校
3 . 为弘扬中华民族优秀传统文化,某学校组织了《诵经典,获新知》的演讲比赛,本次比赛的冠军奖杯由一个铜球和一个托盘组成,如图
,已知球的体积为
,托盘由边长为
的正三角形铜片沿各边中点的连线垂直向上折叠而成,如图
.则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/3/10/2675119547711488/2675575825399808/STEM/68d06652-4bb1-4886-a883-523b62e7df08.png?resizew=590)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c512c047783c07da1d4f4455a4033ef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4966e5af166b69a0a38a98abf555b6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/876959b9f90f2379cf3d0927a8e31005.png)
![](https://img.xkw.com/dksih/QBM/2021/3/10/2675119547711488/2675575825399808/STEM/68d06652-4bb1-4886-a883-523b62e7df08.png?resizew=590)
A.经过三个顶点![]() ![]() |
B.异面直线![]() ![]() ![]() |
C.直线![]() ![]() ![]() |
D.球离球托底面![]() ![]() |
您最近一年使用:0次
2021-03-11更新
|
3037次组卷
|
10卷引用:江苏省南通市海安高级中学2022-2023学年高二下学期期中数学试题
江苏省南通市海安高级中学2022-2023学年高二下学期期中数学试题安徽省舒城中学2023届仿真模拟卷(一)数学试题山东省临沂市2021届高三一模数学试题(已下线)必刷卷03-2021年高考数学考前信息必刷卷(新高考地区专用)广东省汕头市金山中学2021-2022学年高二上学期期中数学试题河北省衡水中学2022届高三上学期六调数学试题浙江省杭州第二中学、温州中学、金华第一中学三校2021-2022学年高一下学期5月联考数学试题辽宁省部分高中2021-2022学年高三上学期期中评测数学试题福建省龙岩市上杭县第一中学2022届高三下学期5月模拟考数学试题广东省清远市华侨中学2023届高三上学期11月月考数学试题
11-12高二·广东·阶段练习
名校
解题方法
4 . 如图所示,在棱长为2的正方体
中,
、
分别为
、
的中点.
(Ⅰ)求证:
//平面
;
(Ⅱ)求证:
;
![](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/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679748eab882a6be0fefd2cc300349a4.png)
(Ⅱ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d435974639ea2850bb5c21efe64b123b.png)
![](https://img.xkw.com/dksih/QBM/2012/2/17/1570744981004288/1570744986304512/STEM/d5f71ea2-bc73-4b2c-b2c8-9b82da5fd984.png?resizew=170)
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