1 . 如图,已知四面体
的所有棱长都等于2,点
,
分别为
,
的中点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3ffbc369e2b6d091ec6aeca032ecf5c.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3ffbc369e2b6d091ec6aeca032ecf5c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/7e1bb291-6ecc-4b86-9409-abf8fc1bd041.png?resizew=174)
您最近一年使用:0次
名校
2 . 如图,在三棱锥
中,
,
,
两两垂直,且
,
为
中点,则
等于( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/b4557bb5-1194-431f-8144-0c95b8082212.png?resizew=151)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9953b7b5c647641edbec4c2ab90a65f4.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/ad11a51d2ce297fe3625006baf483915.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/b4557bb5-1194-431f-8144-0c95b8082212.png?resizew=151)
A.3 | B.2 | C.1 | D.0 |
您最近一年使用:0次
2020-01-10更新
|
327次组卷
|
5卷引用:北京市门头沟区大峪中学2020-2021学年高二上学期期中数学试题
北京市门头沟区大峪中学2020-2021学年高二上学期期中数学试题吉林省吉林市第五十五中学2019-2020学年高二上学期期末考试数学(理)试题(已下线)专题1.3 空间向量的数量积运算-重难点题型精讲-2021-2022学年高二数学举一反三系列(人教A版2019选择性必修第一册)湖南省邵东市第三中学2023-2024学年高二上学期期末考试数学试题(已下线)第08章 立体几何(单元检测)-2021届高考数学(理)一轮复习讲练测
名校
3 . 已知
为空间两两垂直的单位向量,且
则数量积
=_________________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd279988ae4df15bf6d26cafb3b90ecb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b7127eaa21dd4a9662981ed72ab2da7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b0fe4d834e8eaca89ceaf9c64cdabd9.png)
您最近一年使用:0次
2020-05-25更新
|
266次组卷
|
3卷引用:北京市海淀区北京理工大学附属中学2020-2021学年高二上学期期中考试数学试题
名校
4 . 已知空间向量
,
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7588c4387a5af213c91dfeeef5a942f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c6829d31e4409865228bd25d2b68857.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bb58883caf5c8ca1e94389839d294b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
您最近一年使用:0次
2018-02-11更新
|
473次组卷
|
4卷引用:北京市理工大学附属中学2022-2023学年高二上学期期中考试数学试题
名校
5 . 如图,在平行六面体
中,底面是边长为1的正方形,若
,且
,则
的长为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ecbca919bff5a39a99dd7f867dd61f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c1c1979dea336d565c12f2f52a97af6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://img.xkw.com/dksih/QBM/2015/12/9/1572346131849216/1572346137853952/STEM/0013dce5-a9bf-4ff6-8b7b-932172398e6a.png?resizew=267)
您最近一年使用:0次
2016-12-03更新
|
529次组卷
|
7卷引用:北京市首都师范大学附属密云中学2022-2023学年高二上学期阶段性练习数学试题
名校
6 . 在空间中,已知直线
的方向向量为
,平面
的法向量为
,则“直线
与平面
相交”是“
”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fbda256c4b0a5e29212742f5b9f2499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be678a969afd1eb7be0d9845a85fcbca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abb0cf3dfcff7cc876ae9dc276956514.png)
A.充分而不必要条件 | B.必要而不充分条件 |
C.充分必要条件 | D.既不充分也不必要条件 |
您最近一年使用:0次
7 . 已知平面
的一个法向量是
,且点
在平面
上,若
是平面
上任意一点,则向量![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d7751924508f9a250113248ee4c79f9.png)
______ ,点
的坐标满足的方程是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f3c6d0c6ba4a2fdec73c7b89e7bf3a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3719341cda9cb4531104de178c3273e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1b82ad92798b264062c062f4a9a1a5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d7751924508f9a250113248ee4c79f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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