无人侦察机在现代战争中扮演着非常重要的角色,它能在万米高空观察敌方的地面设施和军事力量部署.我国无侦—8(如图1)是一款以侦察为主的无人机,它动力强劲,比大多数防空导弹都要快.已知空间中同时出现了A,B,C,D四个目标(目标与无人机的大小忽略不计),如图2,其中
,
,
,且目标A,B,D所在平面与目标B,C,D所在平面恰好垂直,若无人机可以同时观察到这四个目标,则其最小侦测半径为______
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a9ec23a26af02cdb244def1b48c4cf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdc2281843df0b3a182bd8326e4fa2ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65562966051200b495933462c6cf7ca2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5fe30c67ac20cd4e8b9cc2d0d420a7b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/8/9b766ca1-0335-4d8e-bfed-9d21ef9b4288.png?resizew=380)
2023·山东·模拟预测 查看更多[3]
更新时间:2023-06-06 22:00:56
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