1 . 斜拉桥是将梁用若干根斜拉索拉在塔柱上的桥,它由梁、斜拉索和塔柱三部分组成.如图1,这是一座斜拉索大桥,共有10对永久拉索,在索塔两侧对称排列.如图2,已知拉索上端相邻两个锚的间距
约为4m,拉索下端相邻两个锚的间距
均为18m.最短拉索的锚
,
满足
,
,以
所在直线为
轴,
所在直线为
轴,则最长拉索所在直线的斜率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0e87b202d8416430e92a618b5875af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a32ba8b832dd2d0b1743762caa4fbae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f7b96bcbbfe1a7b1feae58a38cc053b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86c84e2d568e4ffd6e06e9d0aa2016c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d28cbe0b716ea72ce2ae381bfae53a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db883b60884a5af28e081dbafe35d7e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/6/9435a501-c219-4038-9d62-2b2fe916e060.jpg?resizew=545)
A.![]() | B.![]() | C.![]() | D.![]() |
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