1 . 将边长为
正方形
沿对角线
折成直二面角
,有如下三个结论: (1)
;(2)
是等边三角形;(3)四面体
的表面积为
.则正确结论的序号为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1854ba6cc92481d7a616bd2788a47e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6a783e5ffcf7a4ea9e531ea76199487.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16edecab3862a10bc9480543c34478a9.png)
您最近一年使用:0次
解题方法
2 . 有一个圆锥形铅锤,其底面直径为
,母线长为
.P是铅锤底面圆周上一点,则关于下列命题:①铅锤的侧面积为
;②一只蚂蚁从P点出发沿铅锤侧面爬行一周、最终又回到P点的最短路径的长度为
.其中正确的判断是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/22/0377a6a9-7db4-45c3-849f-954a7079b7d8.png?resizew=90)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78d0ab561d0c9bb9099772c596af8bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/976260cbf5e30856d4fd37a4b0a671a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eacd5be04f6142589c5490cc5483c5cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6533a2207c18662d05c4a5996042789e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/22/0377a6a9-7db4-45c3-849f-954a7079b7d8.png?resizew=90)
A.①②都正确 | B.①正确、②错误 |
C.①错误、②正确 | D.①②都错误 |
您最近一年使用:0次
2023-05-22更新
|
362次组卷
|
2卷引用:新疆维吾尔自治区阿勒泰地区2023届高三三模数学(文)试题