18、A flight from one country to another country is called a ( ).

20、国家正式办理外交事务的机构叫( )。

19、民航旅客服务的特点包括( )。

18、“送接礼品时要用双手,不应用单手,更不能用左手。”是( )的风土人情。

17、Your baggage is 10 kilos( ), I’m afraid you have to pay for excess baggage.

16、Passengers to San Francisco by Flight CA 783, please go through( ).

15、——What will happen to me if I refuse the security check?
——( ).

14、Sorry sir,you have to( ) this baggage,for it is too large and will cause you a lot of inconvenience.

13、Passengers,if you haven’t got a boarding card and a baggage check,please go to the( ) to go through the check-in procedures first.

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

11、X射线机采用( ),通电后传送带运行同时光障被物品遮挡,才可能发射X射线。