单选题 Under rated altitude, the pulling force of propeller（）as flight altitude rises.

单选题 Above the rated altitude, the valid power of propeller（） as flight altitude rises.

单选题 The flight altitude, airspeed, M number and temperature of FMS are mainly displayed on the（）

单选题 Longitudinal separation based on time for the aircraft flying on crossing track shall be （） a.15 minutes; b. 10 minutes if navigation aids permit frequent determination of position and speed.

单选题 760 mm (HG) at mean seal level is equivalent to（）.

单选题 Longitudinal separation minima based on time (aircraft flying at the same cruising level on the same track) shall be（）. a.15 minutes; b.10 minutes, if navigation aids permit frequent determination of position and speed; c.5 minutes between aircrafts.

单选题 In general, extending large angle simple flaps increases lift and drag coefficient, decreases critical angle of attack, and（）the ratio of lift and drag.

单选题 The combined installation of DME and ILS is to replace（）.

单选题 Larger separations than the specified minima（）whenever wake turbulence or exceptional circumstances such as unlawful interference call for extra precautions.