在侧棱长为
的正三棱锥
中,
,过
作截面
,则截面的最小周长为( )
![](https://img.xkw.com/dksih/QBM/2011/7/22/1577378699264000/1577378700746752/STEM/c43667c0bf0a4c9d9d1d39195d11ed8f.png?resizew=32)
![](https://img.xkw.com/dksih/QBM/2011/7/22/1577378699264000/1577378700746752/STEM/696df37755a04bdfb20c2d5975c8db32.png?resizew=61)
![](https://img.xkw.com/dksih/QBM/2011/7/22/1577378699264000/1577378700746752/STEM/a3d7e782886d40dd9bf5048e4f1459cd.png?resizew=197)
![](https://img.xkw.com/dksih/QBM/2011/7/22/1577378699264000/1577378700746752/STEM/0d612180d1e548f99aab07d24adad9d8.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2011/7/22/1577378699264000/1577378700746752/STEM/ca6e31428bf04f5984d974d1d7567e12.png?resizew=37)
A.![]() | B.![]() | C.![]() | D.![]() |
10-11高一·辽宁大连·期末 查看更多[1]
(已下线)大连二十三中学2011学年度高一年级期末测试试卷数学
更新时间:2011-07-22 09:57:40
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【知识点】 空间几何体的三视图和直观图
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【推荐1】如图,
的斜二测画法的直观图是腰长为2的等腰直角三角形,
轴经过
的中点,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4d2174f411d9db6ab7b2aea47818cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb0628cecbfc98d390e5447d52414e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26a46e7879436d532af3f4b6e258a81.png)
A.![]() | B.4 | C.![]() | D.![]() |
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单选题
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【推荐2】一个几何体的三视图如图,则其体积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/3/b3206bb8-0558-4429-ac0b-9911b8d7bb83.png?resizew=231)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/3/b3206bb8-0558-4429-ac0b-9911b8d7bb83.png?resizew=231)
A.![]() | B.6 | C.![]() | D.5 |
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