题目内容
In the event of failure of only one landing gear _____ , the pilot may choose to retract all the gear.
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A belly landing needs to be _____ when pilots fail to extend the landing gear.
When the airplane _____ the ground during landings, its vertical speed is instantly reduced to zero.
The purpose of pneumatic tires and shock absorbing landing gears is to _____the impact when the airplane touches the runway.
The load _____ at the moment of touchdown may easily be three or four times the actual weight of the airplane.
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