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【简答题】
从环境空气监测仪器采样口或监测光束到附近最高障碍物之间的距离,至少是该障碍物高出采样口或监测光束距离的()倍以上。
题目标签:
监测仪器
环境空气
障碍物
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【单选题】飞行的安全高度是避免航空器与地面障碍物相撞的()
A.
航图网格最低飞行高度
B.
最低飞行安全高度
C.
最低飞行高度
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【单选题】当障碍物的直径小于1/2λ时,将发生( )。
A.
折射
B.
反射
C.
衍射
D.
不反射
E.
不折射
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【单选题】关门障碍物检测次数( )次。
A.
1
B.
2
C.
3
D.
0.5
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A.
折射
B.
反射
C.
衍射
D.
不反射
E.
不折射
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【判断题】运行轨道允许有障碍物。
A.
正确
B.
错误
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