Pilots have sometimes _____ the landing gear warning horn with the stall warning horn.
A. confounded
B. confounding
C. confused
D. confusing
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Two pilots working as a team provides a sort of human _____ which reduces the workload placed on any one crew member.
A. error
B. redundancy
C. factor
D. aid
_____, is the same as a crash landing, only on water.
A. Precautionary landing
B. Ditching
C. Forced landing
D. Belly landing
The _____ is the gentle settling of the airplane onto the landing surface.
A. landing
B. approach
C. touchdown
D. flare
用数字、文字和符号来表示各种对象和信号等信息的过程称为。
A. 数制
B. 编码
C. 位权
D. 逻辑运算