名校
解题方法
1 . 如图正方体
的棱长为4,点M是棱
的中点,点P在面
内(包含边界),且
,则下列四个命题中:
![](https://img.xkw.com/dksih/QBM/2022/1/27/2903564803244032/2938839180140544/STEM/1449dfd91d1848379d24787a95b2701f.png?resizew=156)
①点
的轨迹的长度为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e9fdc1f8ed0ae44b54a9a2a3aca2db4.png)
②存在
,使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4a53ed1ecd56f1d951001c111cb1563.png)
③直线
与平面
所成角的正弦值最大为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9868f77d5ab5073b6145f1c6d272122e.png)
④沿线段
的轨迹将正方体
切割成两部分,挖去体积较小部分,剩余部分几何体的表面积为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74be65f77a725cbed17ba0a310033352.png)
其中正确命题的序号是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bce932cc5e92720f4ae35492c2f1a068.png)
![](https://img.xkw.com/dksih/QBM/2022/1/27/2903564803244032/2938839180140544/STEM/1449dfd91d1848379d24787a95b2701f.png?resizew=156)
①点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e9fdc1f8ed0ae44b54a9a2a3aca2db4.png)
②存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4a53ed1ecd56f1d951001c111cb1563.png)
③直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f34bc8b04e8c494b91306ac6fe352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2bf9ef324f1289e205e29fed105c38e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9868f77d5ab5073b6145f1c6d272122e.png)
④沿线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f34bc8b04e8c494b91306ac6fe352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74be65f77a725cbed17ba0a310033352.png)
其中正确命题的序号是
您最近一年使用:0次
名校
解题方法
2 . 水平放置的
,用斜二测画法作出的直观图是如图所示的
,其中
,
,则
绕AB所在直线旋转一周后形成的几何体的表面积为( )
![](https://img.xkw.com/dksih/QBM/2020/3/1/2410279989764096/2411755456143360/STEM/a3b03f2e49d5451296639a4a813873e8.png?resizew=163)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffcb05f78db591c6b56930cbc8189863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c7584de68c504dddc10c3322c6ef4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/2020/3/1/2410279989764096/2411755456143360/STEM/a3b03f2e49d5451296639a4a813873e8.png?resizew=163)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-03-03更新
|
406次组卷
|
4卷引用:宁夏吴忠中学2019-2020学年高一下学期期末考试数学试题
名校
3 . 某几何体的三视图如图所示,则该几何体的表面积为
![](https://img.xkw.com/dksih/QBM/2015/2/5/1571981999529984/1571982005207040/STEM/deb4efa10f314b88b2abe1b279ec4718.png)
![](https://img.xkw.com/dksih/QBM/2015/2/5/1571981999529984/1571982005207040/STEM/deb4efa10f314b88b2abe1b279ec4718.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2016-12-03更新
|
222次组卷
|
2卷引用:2020届宁夏六盘山高级中学高三上学期期末考试数学(理)试题