如图,在正方体
中,
是正方形ABCD及其内部的点构成的集合.给出下列三个结论:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/25/4960be11-8404-4793-b39d-60d44fb9a902.png?resizew=158)
①
,
;
②
,
;
③
,
与
不垂直.
其中所有正确结论的序号是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/25/4960be11-8404-4793-b39d-60d44fb9a902.png?resizew=158)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d0aa37f3d7918b9b55c4eefc76ae421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de9332e9e07d322d6ca7655c1203edd3.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54d3f205531cb8f3a50b1e1326d13387.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2985949e7810abec5a2d4994f81c683a.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d0aa37f3d7918b9b55c4eefc76ae421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0ff310aabd2282b539537ebed3f788.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
其中所有正确结论的序号是
2023高三·北京·学业考试 查看更多[2]
更新时间:2023-03-24 16:42:33
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【推荐1】在正方体
中,给出以下四个结论:
(1)直线
平面
;(2)直线
与平面
相交;
(3)直线
平面
; (4)平面
平面
.
上述结论中,所有正确结论的序号为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
(1)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cd8f61df5729a4a941d7403a047dae2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9b7b7793d29d66dfdd89e7a6564a35c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96872cd6cd581ae8a861c7032e0257b4.png)
(3)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/263d398159c7433838b714a9a75d61e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d32b0fac933ccb4eaa623a9ea1b2b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9b7b7793d29d66dfdd89e7a6564a35c.png)
上述结论中,所有正确结论的序号为
![](https://img.xkw.com/dksih/QBM/2019/4/23/2188698964582400/2189492396007424/STEM/6e1d30c125ee40b996e47dca621b1f71.png?resizew=112)
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【推荐2】如图,点P在正方体
的面对角线
上运动,有以下4个结论:
的体积不变 ②
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7977ab975efa6411cc17de39be70d9.png)
③
④平面
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7977ab975efa6411cc17de39be70d9.png)
则所有正确结论的序号是______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad99ef5e70de37345c708b758d545f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f86e2d69b11402d9d6cbb06e057778a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7977ab975efa6411cc17de39be70d9.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d738aec61fee6269dbf8fc9fbd09c276.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecb955df71b56b325021d2552303285f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7977ab975efa6411cc17de39be70d9.png)
则所有正确结论的序号是
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解题方法
【推荐1】在四棱锥
中,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae248960d8c1677cf948f8251275e863.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d906ee0d60f3f4654fb516fe4973413.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d262480ffb55b7617f44b63f130c154a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27fe884b48bfa28b440fcb106794e06c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae248960d8c1677cf948f8251275e863.png)
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【推荐2】经过正方体的两个顶点的所有直线中,异面并且相互垂直的直线有多少__________ 对.
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