题目内容

Proper ______ and balance control is the vital factor for the safe operation of aircraft.

A. safety
B. performance
C. lift
D. weight

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The weight and balance control system ______ the weighing of the aircraft, the maintaining of the weight and balance records, and the proper loading of the aircraft.

A. consists in
B. consists of
C. is consisted in
D. is consisted of

An ______ in any one of the vital elements affects the purpose of the whole weight and balance system.

A. inaccuracy
B. accuracy
C. incorrect
D. correction

The final loading calculations will be ______ if either the aircraft has been improperly weighed or the records contain an error.

A. useless
B. careless
C. meaningless
D. helpless

Improper ______ cuts down the efficiency of an aircraft from the standpoint of altitude, maneuverability, rate of climb, and speed.

A. weighing
B. weight
C. load
D. loading