1 . 在四面体
中,
,D为
的三等分点(靠近B点),E为
的中点,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4278c0911e7df78965e78cff69cac5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/352afb2166bc2d282d55bd7bba4388e7.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/398c5d7b6ff455e94a78034670a3eeca.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2 . 在平行六面体
中,
是平行四边形
的对角线的交点,
为
的中点,记
,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.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/8a5c30451a305529cbaeddcfaf55a4a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a014dff8997c661055229de29c61cfc.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 如图,在正四面体
中,
是
的中点,
,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/29/1333ba03-e885-4d69-ae93-6bb68d22a580.png?resizew=139)
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd344fbde526ed6c84ba7a9924140fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d627b9a5b268fe69aa466f7c465c5f3f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/29/1333ba03-e885-4d69-ae93-6bb68d22a580.png?resizew=139)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
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名校
4 . 在三棱柱
中,若
,
,
,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/3eab8c53-e5b2-43bb-ac48-ac72f0dba9c3.png?resizew=163)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e55362a3a1f592e6551851c42d3078.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9206f052cc7298fdf9049f9386f53928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8780f5b68f8907a57c1c2f96233a78c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89a5b3db010507ba0985f57168d9150c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/3eab8c53-e5b2-43bb-ac48-ac72f0dba9c3.png?resizew=163)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-02-29更新
|
250次组卷
|
2卷引用:山东省济南市2023-2024学年高二上学期1月期末质量检测数学试题
5 . 已知三棱锥
,点M,N分别为BC,PA的中点,且
,用
表示
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ae7dc09ab4960c7e8df32c39a573448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e12e95f703ad30ab9a3d38376830989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a014dff8997c661055229de29c61cfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8926ddd0b69d714c7310cc5bf23d199d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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6 . 如图1,在四面体
中,点
分别为线段
的中点,若
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/881ec4ef24907683dd46062e5ff149c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9dda0dd9f20ab49de6bd5cf6297f9f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f12763b7b929dbf2791735248029bac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/22/2040c859-6d33-401d-a63a-43633dbc2c7b.png?resizew=140)
A.![]() | B.![]() | C.![]() | D.1 |
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2024-02-18更新
|
130次组卷
|
2卷引用:贵州省毕节市威宁县2023-2024学年高二上学期高中素质教育期末测试数学试卷
7 . 在平行六面体
中,
为
的中点,若
,则
( )
![](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/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8426fc83fe0252a7302c2803785a71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55b2ce97e1fd47e7a312391a6fd959ab.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
8 . 如图,在平行六面体
中,
为
的中点,则用向量
可表示向量
为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/b2e4f0f7-7c6c-46a6-94a6-3b5a37dd735a.png?resizew=126)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a583b9fa0473e204e5e233ae2a5bc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c597ff77c65c5add6f50294e3eee9536.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae951e0bb5a2a406f1572fc1e4964265.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a664436fc8128a14f95ddc09c504489.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/b2e4f0f7-7c6c-46a6-94a6-3b5a37dd735a.png?resizew=126)
A.![]() | B.![]() |
C.![]() | D.![]() |
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9 . 在三棱锥
中,
为
的中点,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/11/1e99e52d-3af5-4dcd-a98d-0481254bc045.png?resizew=155)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87d859221abb763742e332779e9eab59.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/11/1e99e52d-3af5-4dcd-a98d-0481254bc045.png?resizew=155)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2024-02-12更新
|
228次组卷
|
5卷引用:河北省保定市定州市2023-2024学年高二上学期1月期末考试数学试题
10 . 我国古代数学名著《九章算术》中将有三条棱互相平行且只有一个面为平行四边形的五面体称为刍甍.如图,今有一刍甍,四边形
为平行四边形,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
平面
,且
,点
在棱
上,且
.设
,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/12/6139f5e2-560a-465c-9a41-6a46932da06f.png?resizew=169)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed6034301fc4110da89bdb0f46ad82ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ddfb54b33fa3983766ac2271f8c00bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40daecf4155f894e758c38712fbb47bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98ce0da153621bbd05519f168b527e3e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/12/6139f5e2-560a-465c-9a41-6a46932da06f.png?resizew=169)
A.![]() | B.![]() |
C.![]() | D.![]() |
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