已知图所示的正方体ABCD-A1B1C1D1的外接球表面积为12π,点P在正方体的对角面BDD1B1内(包括边界),则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/15/b4f49342-3cdb-460b-9727-a0160b45ce7c.png?resizew=160)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/15/b4f49342-3cdb-460b-9727-a0160b45ce7c.png?resizew=160)
A.若![]() ![]() |
B.若BP⊥平面A1C1D,则P的轨迹长度为![]() |
C.若点P到平面A1B1C1D1的距离与到点B的距离相等,则P的轨迹是椭圆的一段 |
D.PA+PA1的最小值为![]() |
2023高三·全国·专题练习 查看更多[2]
更新时间:2023-05-14 11:23:04
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【推荐1】如图,等边三角形ABC的边长为1,BC边上的高为AD,沿AD把三角形ABC折起来,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/4b3ca48f-0d5d-4d28-b4b6-6bc5180d701d.png?resizew=138)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/4b3ca48f-0d5d-4d28-b4b6-6bc5180d701d.png?resizew=138)
A.在折起的过程中始终有AD⊥平面DB′C |
B.三棱锥A-DB′C的体积无最大值 |
C.当∠B′DC=60°时,点A到B′C的距离为![]() |
D.当∠B′DC=90°时,点C到平面ADB′的距离为![]() |
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【推荐2】正方体
的棱长为
,
,
,
分别为
,
,
的中点.则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
A.![]() |
B.若![]() ![]() ![]() |
C.平面![]() ![]() |
D.点![]() ![]() ![]() |
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【推荐3】如图,在四棱柱
中,底面
是等腰梯形,
,
,
,
底面
,则( )
![](https://img.xkw.com/dksih/QBM/2021/10/20/2833567223308288/2836942310260736/STEM/bc514863-ea08-4fe5-89e2-51338c377c75.png?resizew=296)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
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A.![]() ![]() |
B.直线![]() ![]() ![]() |
C.平面![]() ![]() ![]() |
D.点C到平面![]() ![]() |
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【推荐1】点
是正方体
中侧面
上的一个动点,则下面结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
A.满足![]() ![]() |
B.若正方体的棱长为1,三棱锥![]() ![]() |
C.点![]() ![]() ![]() |
D.在线段![]() ![]() ![]() ![]() ![]() |
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【推荐2】在棱长为2的正方体
中,
为棱
的中点,
为正方形
内的一个动点(包括边界),且
平面
,则下列说法正确的有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/8/b5cef1d7-c7e7-40a6-9da7-0586dc90b8ac.png?resizew=163)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71a73120cd0988eb4a63436e7a4b9470.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1df970d8b2fcbb38bfac1dc33da9179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923189afc198d153c79059a827f63c87.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/8/b5cef1d7-c7e7-40a6-9da7-0586dc90b8ac.png?resizew=163)
A.动点![]() ![]() |
B.三棱锥![]() ![]() |
C.![]() ![]() |
D.当三棱锥![]() ![]() |
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【推荐1】已知
是椭圆
和双曲线
的公共焦点,P是它们的一个公共点,且
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A.![]() | B.![]() |
C.![]() | D.![]() ![]() |
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【推荐2】已知
是左右焦点分别为
的椭圆
上的动点,
,下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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A.![]() | B.![]() ![]() |
C.存在点![]() ![]() | D.![]() ![]() |
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【推荐1】已知抛物线
的焦点为F,C上一点
到
和到
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
A.![]() |
B.![]() ![]() |
C.圆![]() ![]() |
D.若过点![]() ![]() ![]() ![]() ![]() |
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【推荐2】已知F为抛物线
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A.过![]() ![]() |
B.![]() ![]() ![]() |
C.若直线![]() ![]() ![]() ![]() |
D.若直线![]() ![]() ![]() ![]() ![]() |
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