题目内容
A voice message system on some aircraft may give a clear _____ warning indication: “GEAR NOT DOWN”.
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When the pilot forgets to extend the landing gear, he needs to conduct a _____ landing.
The most common cause of gear-up landing is the pilot imply forgetting ______ the landing gear before touch down.
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.
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