名校
1 . 三棱锥
中,
、
、
两两垂直,且
.给出下列四个命题:
;
②
;
③
和
的夹角为
;
④三棱锥
的体积为
.
其中所有正确命题的序号为______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4278c0911e7df78965e78cff69cac5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/242b14a89363fa1e1a3b74ed989a5311.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5691ac680399b94b80fffbee0915284.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc062918c6bbb88408cabcebfff1766e.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89e5ebac8300e2248cefe2935ac489c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00490134f8caa9cc28910fb1aaff85e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
④三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4278c0911e7df78965e78cff69cac5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/337a5868c11f34177cb402fe1e3eccdc.png)
其中所有正确命题的序号为
您最近一年使用:0次
2020-11-28更新
|
949次组卷
|
3卷引用:北京市第四中2020-2021学年高二上学期数学期中试题