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相关题目
单选题
What are VISUAL METEOROLOGICAL CONDITIONS?
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What is a VISUAL APPROACH?
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What are VISUAL FLIGHT RULES?
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What is an UNMANNED AIRCRAFT?
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What is TRANSITION HEIGHT?
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What is TRANSITION LEVEL?
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What is TRANSITION ALTITUDE?
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What is SECONDARY SURVEILLANCE RADAR?
单选题
What is RUNWAY VISUAL RANGE?
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What is RUNWAY OCCUPANCY TIME?
