题目内容

In the event of failure of only one landing gear _____ , the pilot may choose to retract all the gear.

A. brake
B. leg
C. crank
D. tire

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A belly landing needs to be _____ when pilots fail to extend the landing gear.

A. performed
B. perforated
C. perfumed
D. perfected

When the airplane _____ the ground during landings, its vertical speed is instantly reduced to zero.

A. contracts
B. contrasts
C. contacts
D. contains

The purpose of pneumatic tires and shock absorbing landing gears is to _____the impact when the airplane touches the runway.

A. fasten
B. loosen
C. fashion
D. cushion

The load _____ at the moment of touchdown may easily be three or four times the actual weight of the airplane.

A. proposed
B. imposed
C. supposed
D. exposed

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