题目内容
The most common cause of gear-up landing is the pilot imply forgetting ______ the landing gear before touch down.
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If the airplane lands too fast or too hard in a belly landing, it may _____.
Belly landings are one of the most common types of aircraft accidents, and are normally not fatal if _____ carefully.
A_____ pilot may neglect the gear-up warning lights.
An alternative system uses the _____ to engage a warning when the airplane is close to the ground and descending with the gear not down.
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