1 . 如图所示,一学生在河岸紧靠河边笔直行走,在
处时,经观察,在河对岸有一参照物
与学生前进方向成
角,学生前进
后,测得该参照物与前进方向成
角,则河的宽度为______
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ef1f95abd40a70808ed44a5dbc28fa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a4c9b697e3df2b5469b71d3b5e47a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/fb1d7dca-583f-41de-8cad-9b0292f3cf0b.png?resizew=85)
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2020-03-13更新
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532次组卷
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3卷引用:广东省2022年普通高中学业水平考试模拟卷数学试题(三)