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1 . 位于德国东部萨克森州的莱科勃克桥(如图所示)有“仙境之桥”之称,它的桥形可近似地看成抛物线的一部分.该桥的高度为
米,跨径为
米,则桥形对应的抛物线的焦点到准线的距离为________ 米.(结果用
,
表示)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/87ea882c-51c6-489d-a844-4545d8a4943f.png?resizew=98)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/ed8558fd-bcb4-41b1-825c-e3dc06c61aca.png?resizew=106)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/87ea882c-51c6-489d-a844-4545d8a4943f.png?resizew=98)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/ed8558fd-bcb4-41b1-825c-e3dc06c61aca.png?resizew=106)
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2021-12-21更新
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4卷引用:山东省青岛市青岛第一中学2022-2023学年高三上学期期中数学试题