题目内容

词汇与结构The ______ nature of the weather means that the pilot must be prepared to make further adjustments in flight.

A. predictable
B. unpredictable
C. prepared
D. unprepared

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词汇与结构The primary instrument of navigation is the ______ compass.

A. magnetic
B. magic
C. material
D. magnificent

词汇与结构The pilot needs to take into account the slower initial ______during climb to calculate the time to top of climb.

A. ground speed
B. airspeed
C. adjusted speed
D. descent speed

词汇与结构The flight time will depend on both the desired ______ of the aircraft and the wind.

A. ground speed
B. descent speed
C. climb speed
D. cruising speed

词汇与结构A tailwind will ______ the flight times while a headwind will increase them.

A. short
B. shorted
C. shorten
D. shortened

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