把球放在长方体纸盒内,球的一部分露出盒外,其截面如图所示,若
,则球的半径为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/824f77508c8aa057d78ee1f433c43d86.png)
A.2cm | B.2.5cm | C.![]() | D.![]() |
更新时间:2024-05-20 18:30:37
|
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【推荐1】如图,在直角三角形
中,
,点
、
分别为
和
的中点,
,
,则
( )
![](https://img.xkw.com/dksih/QBM/2020/5/29/2473126529794048/2473741784498176/STEM/73ef634c0409488fb756acb41a280eff.png?resizew=118)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图铁路上
,
两点相距40千米,
,
为两村庄,
,
,垂足分别为
和
,
千米,
千米.现在要在铁路旁修建个煤栈
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两村到煤栈的距离相等,那么煤栈
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![](https://img.xkw.com/dksih/QBM/2021/4/12/2698115282092032/2704036448272384/STEM/646a6990-97ce-4df2-b33c-73892b03c2cf.png)
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A.20千米 | B.16千米 | C.12千米 | D.无法确定 |
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【推荐1】如图,拱桥可以近似地看作直径为
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【推荐2】直径为
分米的圆柱形排水管,截面如图所示.若管内有积水(阴影部分),水面宽
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分米,则积水的最大深度
为( )
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A.2分米 | B.4分米 | C.6分米 | D.8分米 |
您最近一年使用:0次