如图,网格纸上小正方形的边长为1,粗线画出的是某四面体的三视图,则该四面体的体积为( )
![](https://img.xkw.com/dksih/QBM/2020/7/15/2506613601779712/2506697768206336/STEM/9610112f81fe423ba9bc664c6917d4c1.png?resizew=202)
![](https://img.xkw.com/dksih/QBM/2020/7/15/2506613601779712/2506697768206336/STEM/9610112f81fe423ba9bc664c6917d4c1.png?resizew=202)
A.![]() | B.![]() | C.4 | D.8 |
更新时间:2020-07-15 15:52:34
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【推荐1】若某几何体的三视图如图所示,则该几何体的体积是
![](https://img.xkw.com/dksih/QBM/2017/5/17/1688984252235776/1748395528699904/STEM/ed1cac17d56948698676c305d6c0900a.png?resizew=93)
![](https://img.xkw.com/dksih/QBM/2017/5/17/1688984252235776/1748395528699904/STEM/ed1cac17d56948698676c305d6c0900a.png?resizew=93)
A.15 | B.20 | C.25 | D.30 |
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【推荐2】如图,在矩形ABCD中,
,
,沿BD将矩形ABCD折叠,连接AC,所得三棱锥A-BCD正视图和俯视图如图所示,则三棱锥A-BCD的侧视图为( )
![](https://img.xkw.com/dksih/QBM/2022/3/29/2946770221383680/2947579343273984/STEM/ee1d4d4eacac434b834e196d2dcfb205.png?resizew=272)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://img.xkw.com/dksih/QBM/2022/3/29/2946770221383680/2947579343273984/STEM/ee1d4d4eacac434b834e196d2dcfb205.png?resizew=272)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】在《九章算术》中,将四个面都为直角三角形的四面体称之为鳖臑(biē,nào).如图,网格纸上小正方形的边长为1,粗实线画出的是某鳖臑的三视图,则该鳖臑的体积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/10/5d3c8a2d-6560-4153-a36b-ff4970cec989.png?resizew=165)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/10/5d3c8a2d-6560-4153-a36b-ff4970cec989.png?resizew=165)
A.6 | B.12 | C.16 | D.18 |
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【推荐2】已知某个几何体的三视图如图所示,根据图中所给的数据,可得该几何体的体积为( )
![](https://img.xkw.com/dksih/QBM/2020/11/18/2595803178663936/2596491278376960/STEM/e6b31007-6fdb-42c3-87a4-40c98110abf0.png?resizew=233)
![](https://img.xkw.com/dksih/QBM/2020/11/18/2595803178663936/2596491278376960/STEM/e6b31007-6fdb-42c3-87a4-40c98110abf0.png?resizew=233)
A.![]() | B.![]() | C.![]() | D.![]() |
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