80、乘机旅客的差异分类主要包括( )、性别差异、职业差异、职务差异、散客与团体旅客的差异以及初次乘机旅客与经常乘机旅客的差异。

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?

45、The security check is carried out for( ).

44、A:Can you( ) ?

43、A: I’ve heard an announcement that my flight has been delayed. Could you tell me why?

45、A: Where are you going?

44、A: Are you going to take a domestic or an international flight?

43、( )is the carriage of goods from place to place by air.

42、The staff should give the( ) a manual search.