词汇与结构The primary instrument of navigation is the ______ compass.
A. magnetic
B. magic
C. material
D. magnificent
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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
词汇与结构The point of no return is the point on a flight at which a plane has just enough fuel, plus any mandatory reserve, to return to the airfield from which it ______.
A. departed
B. passed
C. arrived
D. reached