词汇与结构The heading indicator and attitude indicator use gyros as an unchanging_____ in space.
A. reserve
B. redundancy
C. aid
D. reference
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词汇与结构The rotor of the universally mounted gyro remains in the same position even if the _____ gimbals are moved. which reduces the workload placed on any one crew member.
A. around
B. surrounding
C. closing
D. standing
词汇与结构Once the gyros are spinning, they stay in_____ positions with respect to the horizon or direction.
A. content
B. consist
C. constant
D. contact
词汇与结构The _____of autopilots to airliners with more than twenty seats is generally made mandatory by international aviation regulations.
A. fitting
B. filter
C. fit
D. fitment
词汇与结构Autopilots in modern complex aircraft are three-axis and generally divide a flight into taxi, takeoff, ascent, level, descent, approach and landing _____.
A. paces
B. progress
C. phases
D. projects