如图,正四面体
的顶点
,
,
分别在两两垂直的三条射线
,
,
上,则下列说法中正确的为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/16/1768b638-ee14-411e-bae4-1e3562c8017a.png?resizew=143)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/c3e5af20b2f8c1fba4470f9650989e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b14069d21d32c724f0ebe3e311f114c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5615812990deef255366042987977c58.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/16/1768b638-ee14-411e-bae4-1e3562c8017a.png?resizew=143)
A.![]() | B.直线![]() ![]() |
C.直线![]() ![]() ![]() | D.二面角![]() ![]() |
更新时间:2022-10-14 11:29:52
|
相似题推荐
多选题
|
适中
(0.65)
名校
解题方法
【推荐1】如图所示,在四棱锥
中,平面
平面ABCD,侧面PAD是边长为
的正三角形,底面ABCD为矩形,且
,点Q是PD的中点,则下列结论描述正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/8533e30c-d4b2-4570-9108-9a2fae478604.png?resizew=181)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41322821ce31416fdac8dd6e0aa41c71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4836945f324c29ef818b423bcc017a93.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/8533e30c-d4b2-4570-9108-9a2fae478604.png?resizew=181)
A.![]() |
B.B,Q两点间的距离等于![]() |
C.DC与平面AQC所成的角为60° |
D.三棱锥![]() |
您最近一年使用:0次
多选题
|
适中
(0.65)
名校
解题方法
【推荐2】如图,在平行六面体
中,以顶点
为端点的三条棱长均为6,且它们彼此的夹角都是
,下列说法中不正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/29/bce411e4-8466-48af-bbf5-3721f5b25157.png?resizew=174)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/29/bce411e4-8466-48af-bbf5-3721f5b25157.png?resizew=174)
A.![]() |
B.![]() ![]() |
C.向量![]() ![]() ![]() |
D.直线![]() ![]() ![]() |
您最近一年使用:0次
多选题
|
适中
(0.65)
解题方法
【推荐1】如图,
是矩形
所在平面外一点,
,二面角![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
为
,
为
中点,
为
中点,
为
中点.则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93b9239263f68a3c495a2b443fcedf7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27f35abf35a6045f10dd7f681fea6fee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
A.![]() | B.![]() ![]() |
C.![]() | D.![]() ![]() ![]() |
您最近一年使用:0次
多选题
|
适中
(0.65)
名校
解题方法
【推荐2】如图,在棱长为2的正方体
中,E,F,G分别是
的中点,点P在线段
上,
平面
,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/28/10660d50-2e32-46d4-a638-6dd14dd166f8.png?resizew=176)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e21de25a662ba9e513dee5d6e34cb237.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b6053e396df2cd152e1329fce766d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/28/10660d50-2e32-46d4-a638-6dd14dd166f8.png?resizew=176)
A.![]() ![]() ![]() | B.点P为线段![]() |
C.三棱锥![]() ![]() | D.平面![]() ![]() |
您最近一年使用:0次
多选题
|
适中
(0.65)
名校
解题方法
【推荐1】如图,已知正方体
的棱长为2,
,
,
分别为
,
,
的中点,以下说法正确的是( )
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
A.三棱锥![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.二面角![]() ![]() |
您最近一年使用:0次
多选题
|
适中
(0.65)
解题方法
【推荐2】如图,在棱长为2的正方体
中,点
在线段
上运动,则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/5a8e833c-bcbd-4239-9f58-9507fa4f2e23.png?resizew=146)
![](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/0d8772aa893a9c1d40f714cb25701701.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/5a8e833c-bcbd-4239-9f58-9507fa4f2e23.png?resizew=146)
A.几何体![]() ![]() |
B.![]() ![]() |
C.异面直线![]() ![]() ![]() |
D.面![]() ![]() ![]() |
您最近一年使用:0次