名校
1 . 如图,圆锥
内有一个内切球
,球
与母线
分别切于点
.若
是边长为2的等边三角形,
为圆锥底面圆的中心,
为圆
的一条直径(
与
不重合),则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f526e2fe627bb4ddebe708c07d0a22fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7763508722ff870953cbb18efe48de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f63075fdeeb9e765dd696c4ff43ba1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
A.球的表面积与圆锥的侧面积之比为![]() |
B.平面![]() |
C.四面体![]() ![]() |
D.若![]() ![]() ![]() |
您最近一年使用:0次
2023-06-18更新
|
388次组卷
|
3卷引用:江苏省四所百强中学(南京师大附中等)2022-2023学年高二下学期6月月考数学试题
名校
解题方法
2 . 空间直角坐标系中,设坐标原点为
,定点
、
、
坐标分别是
、
、
,则有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/a4356bb38102094883fb82032644dc51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f78b17f6669294783c9b93171d7f4076.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dd4721a9a41ad76fe0d2975e7d793ac.png)
A.四面体![]() |
B.![]() |
C.![]() ![]() |
D.若点![]() ![]() ![]() ![]() |
您最近一年使用:0次
2022-01-07更新
|
517次组卷
|
2卷引用:广东省佛山市第一中学2021-2022学年高二上学期期中数学试题
名校
3 . 菱形ABCD的边长为4,∠A=60°,E为AB的中点(如图1),将
ADE沿直线DE翻折至
处(如图2),连接
,
,下列说法中正确的有( )
![](https://img.xkw.com/dksih/QBM/2021/11/10/2848359063805952/2850594040209408/STEM/3fc42cd5fc10453d87cf962c09ae6269.png?resizew=432)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34dbf33492e5223df78dea34a24ae015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e663220a66eff19da6a71e46b397db2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
![](https://img.xkw.com/dksih/QBM/2021/11/10/2848359063805952/2850594040209408/STEM/3fc42cd5fc10453d87cf962c09ae6269.png?resizew=432)
A.在翻折的过程中(不包括初始位置),平面![]() ![]() |
B.若F为![]() ![]() ![]() |
C.若![]() ![]() ![]() |
D.若![]() ![]() ![]() |
您最近一年使用:0次
2021-11-15更新
|
535次组卷
|
2卷引用:云南师范大学附属中学2021-2022学年高二上学期期中考试数学试题