73、以下关于纸壳火雷管说法正确的是( )。

45、I’m afraid you have to stay here for the night, but the airline is responsible for your( ).

44、I’d like to( ) for the inconvenience caused by this delay.

43、Which of the following is not the number code of Delta Air Lines?

44、What kind of things cannot be taken on the plane?

43、If you don’t have any( ),the security check will be very quick.

42、The purpose of security check is to prevent( ).

46、A:I have just checked in for Flight MU586.What should I do now?

45、I’m sorry to tell you that your flight has been delayed owing to( ).

44、A:( )

43、Which of the following is not the two letter code of American Airlines?