名校
1 . 如图,已知正方体
的棱长为
分别是棱
上的动点,若
,则线段
的中点
的轨迹是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/da6a8aad-5c23-4549-b52c-ba37c8107af5.png?resizew=168)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82f4e92a953b0f5371eb313d7c032e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00d061c7a9c98768ead226c27bdfd2f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/056c2272e0d10d6dd9706e6324d8e62d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/da6a8aad-5c23-4549-b52c-ba37c8107af5.png?resizew=168)
A.一条线段 | B.一段圆弧 |
C.一部分球面 | D.两条平行线段 |
您最近一年使用:0次
2022-11-22更新
|
368次组卷
|
6卷引用:山西省长治市第二中学校2019-2020学年高二上学期12月月考数学(理)试题
名校
2 . 如图,正方体
的棱长为
,点
是
内部(不包括边界)的动点.若
,则线段
长度的取值不可能为( )
![](https://img.xkw.com/dksih/QBM/2022/4/2/2949364570054656/2950829731373056/STEM/1766251a-da96-4eda-b4ab-5252fce368dd.png?resizew=179)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de60f6ffd5ab327d4cfe32d26d95da70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55e1de129bfc451f4c7160cc50666ad8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://img.xkw.com/dksih/QBM/2022/4/2/2949364570054656/2950829731373056/STEM/1766251a-da96-4eda-b4ab-5252fce368dd.png?resizew=179)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-04-04更新
|
339次组卷
|
2卷引用:山西省长治市第二中学校2022届高三下学期第十二次练考数学(理)试题
名校
3 . 如图,在四棱锥
中,侧面
为正三角形,底面
为正方形,侧面
底面
,
为底面
内的一个动点,且满足
,则点
在正方形
内的轨迹为______ .(填序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b723672c82c0affb2e2e1ac5c00a2cc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2020/11/18/2595515659624448/2604798352097280/STEM/b421224622164a4a95cabe1ede0c198f.png?resizew=414)
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