1 . 在棱长为2的正四面体
中,
,
分别为
,
的中点,则直线
和
夹角的余弦值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 已知向量
,
,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/701b7381d4bd87cf0627eae443a021f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45964da64974b51c9880c54c73211c3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7dced91de1b8c38aa95ffee0e5dc202.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
A.![]() | B.![]() | C.4 | D.6 |
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3 . 如图所示的三棱锥A-BCD中,令
,
,
,且M,G分别是BC,CD的中点,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3adc4ed291596abf3bb93ae7a075d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cc03a3ba496faee748a8d63e5d4fa92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/381985fdee6a1ac3ad4a73f5f653b84c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc09d87cf940d0e0c1f7ce6640b15fd.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-06-04更新
|
223次组卷
|
2卷引用:陕西省榆林市第一中学2023-2024学年高二上学期期中考试数学试题
名校
解题方法
4 . 我国古代《九章算术》将上下两个平行平面为矩形的六面体称为刍童.如图池盆几何体是一个刍童,其中上,下底面均为正方形,且边长分别为8和4,侧面是全等的等腰梯形,且梯形的高为
,则该盆中最多能装的水的体积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b91d650c2fc1a741fabdb333b09aeb6.png)
A.![]() | B.![]() | C.![]() | D.448 |
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5 . 下列命题正确的是( )
A.三点确定一个平面 |
B.四条首尾相连的线段确定一个平面 |
C.两条平行直线与同一条直线相交,三条直线在同一平面内 |
D.空间两两相交的三条直线在同一平面内 |
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解题方法
6 . 如图,在空间直角坐标系
中,正方形
与矩形
所在平面互相垂直(
与原点
重合),
在
上,且
平面
,则
点的坐标为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/6/4/7f81f22c-3080-4950-b4eb-f0de029f279f.png?resizew=187)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e336d6ca2cae3d6e6c3810d7e521a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4b93d7abcfc4c3df48f03aa969c17f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdbc4482145feccd25000e1ab5ee0a4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f33fa5152ba27f7b8a28890cefca219.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/6/4/7f81f22c-3080-4950-b4eb-f0de029f279f.png?resizew=187)
A.![]() | B.![]() |
C.![]() | D.![]() |
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7 . 在正三棱锥
中,侧面与底面所成二面角的正切值为
,则这个三棱锥的内切球半径为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f33b2ba6f8abe712313393a16340be0.png)
A.1 | B.![]() | C.2 | D.![]() |
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8 . 已知直线
和平面
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
A.若![]() ![]() | B.若![]() ![]() |
C.若![]() ![]() | D.若![]() ![]() |
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9 . 已知空间三点
,
,
,则
与
的夹角为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f6dcd362a44588747e88b206e7c5ca4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4caba22130af21cbde75bd92ba2aea8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7caeeea2761360cf6ab346e7259b3fd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb5d89b04570ceda2c29e11cb27a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbaeae7045ad94158cdf5ae97073bc17.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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10 . 圆台的上底面面积为
,下底面面积为
,母线长为4,则圆台的侧面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70f5389990c3a0c5373f3bd9fb2454c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7ae3e6e1924f2f92529860e905c9d32.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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