题目内容
Passenger services are centered in the terminal building, where passengers load and _____ baggage.
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Airport security involves ensuring the safety by screening passengers and their luggage for weapon or _____.
Large numbers of people pass through airports, which presents a _____ for terrorism and other forms of crime.
Pilots remain on high alert for any _____ hazardous conditions during takeoff and landing.
That airplane crash dealt a _____ blow to this airline company.
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