一个几何体的三视图如图所示,则该几何体的体积为
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572663768809472/1572663774126080/STEM/cdee3f15558b46df99a72c4e0c074c9d.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572663768809472/1572663774126080/STEM/cdee3f15558b46df99a72c4e0c074c9d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2016-12-04 08:15:33
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【推荐1】某几何体的三视图如图所示,那么该几何体最长的棱与最短的棱所在直线所成角的余弦值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/3bc92b25-630c-44bf-86c0-672ae89ccad0.png?resizew=201)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/3bc92b25-630c-44bf-86c0-672ae89ccad0.png?resizew=201)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】一个三棱锥的三视图如图所示,则该三棱锥的表面积为( )
![](https://img.xkw.com/dksih/QBM/2018/9/5/2025863100882944/2041960109244417/STEM/40eaf18e04a54bf7b80cc37ed0ad1c9c.png?resizew=172)
![](https://img.xkw.com/dksih/QBM/2018/9/5/2025863100882944/2041960109244417/STEM/40eaf18e04a54bf7b80cc37ed0ad1c9c.png?resizew=172)
A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐1】如图,在正方体
中,点P在面对角线
上运动,下列四个命题中错误 的是( )
![](https://img.xkw.com/dksih/QBM/2021/7/6/2758424107974656/2767107689234432/STEM/ee484bd20bf5431b992aa65f99d4c393.png?resizew=175)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/2021/7/6/2758424107974656/2767107689234432/STEM/ee484bd20bf5431b992aa65f99d4c393.png?resizew=175)
A.![]() ![]() | B.平面![]() ![]() |
C.三棱锥![]() | D.![]() |
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【推荐2】如图,正方体
的棱长为
,
,
是线段
上的两个动点,且
,则下列结论错误 的是
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/15/bc391473-b662-4392-bf24-1aff8a7a3b1b.png?resizew=155)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e438a162ed349f7f25333e8f6c044e6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/15/bc391473-b662-4392-bf24-1aff8a7a3b1b.png?resizew=155)
A.![]() |
B.直线![]() ![]() |
C.![]() ![]() |
D.三棱锥![]() |
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