相关题目
A man has a duty to ( ) money for his family.
He was not ( ) for the examination because he was over age.
Foreign exchange transactions, if any, are usually attended by the ( ) as well.
In contrast with passengers, who utilize far more space than is economic for their weight, freight containers require little more space than their own ( ).
What advantages doesn’t air transport have? ( ) .
It was not until the general introduction of ( ) for transport, such as the Douglas DC-3, during the late 1930s that extensive takeoff and landing distances were needed.
Air traffic control refers to management of aircraft proceeding along ( ) , including airport arrivals and departures.
An airliner landing at a large airport may have to negotiate a mile of ( ) to reach a stand or parking place.
Several hours before passengers arrive for the flight of the day, ( ) at the airport are preparing the aircraft.
A runway is a defined ( ) area on the land of an airport for the landing and take-off of aircraft.
