题目内容
A _____ is a closed building structure to hold aircraft, spacecraft or military tanks in protective storage.
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An airport needs to provide large automobile parking areas or multistory ramps to _____ travelers.
Airports differ in size and _____ depending on their function and the types of aircraft that use them.
General aviation airports typically _____ small civilian aircraft.
_____ runways from 3,000 to 3,700 meters in length could be found at commercial airports.
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