20-21高二·全国·假期作业
名校
解题方法
1 . 如图,边长为
的正方形
中,点
、
分别是
、
的中点,将
、
、
分别沿
、
、
折起,使得
、
、
三点重合于点
,若四面体
的四个顶点在同一个球面上,则该球的表面积为( ).
![](https://img.xkw.com/dksih/QBM/2021/1/2/2627625581830144/2627957209669632/STEM/e4555bb5929043f7a13d8c5d19dbd434.png?resizew=265)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9966839944bf4087bd18fede1d2d2c42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e9b8a991d00fdd2810dda7adc54fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fdb0f5d98c262afe3783b1ac24735f.png)
![](https://img.xkw.com/dksih/QBM/2021/1/2/2627625581830144/2627957209669632/STEM/e4555bb5929043f7a13d8c5d19dbd434.png?resizew=265)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
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名校
解题方法
2 . 已知在平行六面体
中,
,且
,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/16/2bf44935-b9f7-4ecd-904c-86565ce57dfb.png?resizew=174)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e002e9a75ab07c95c7274ab72498b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13258ebc990cf559912cffc924dcac34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6660dbf8615c2a0dda71f6d9f395c1a5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/16/2bf44935-b9f7-4ecd-904c-86565ce57dfb.png?resizew=174)
A.![]() | B.![]() | C.![]() | D.![]() |
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2023-01-13更新
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3卷引用:宁夏育才中学2022-2023学年高二下学期开学考试理科数学试题
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3 . 已知点
、
,点
关于
轴对称的点为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fd0158980b9fd5ccd743cae12c6ce2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f58d82c89a162672b46680d2ab12f0be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/990b2cbabb3c004dbbfb0eb6724f6ac1.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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4 . 设点
,
关于
面对称的点为
,则线段
的中点
到点
的距离为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b2a9893407e3e3b57a8b2faf66fde7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d96461d2b3421aed548b754637ca8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 若空间直角坐标系中,x轴上一点P到点Q(3,1,1)的距离为
,则点P的坐标为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
A.(3,0,0) | B.(2,0,0) |
C.(4,0,0) | D.(2,0,0)或(4,0,0) |
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2020-03-28更新
|
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