【单选题】The locking device of the nose wheel must always be ____ when an aircraft is towed.
【单选题】“用人之为人,不用人之为我”这是哪一家学派的观点?
【单选题】When an aircraft is no longer in distress it should ____
B.
inform ATC that they are resuming normal flight
C.
fly under the guidance of ATC
D.
transmit a message canceling the emergency
【单选题】下列项目中属于预算定额中人工工日消耗量中人工幅度差的是( )。
【单选题】含水量较大的粘性土最适合的压实机械为( )。
【单选题】When an aircraft is making a turn in flight, the lift is ____ the weight of the aircraft.