42、X射线机通电后只有同时满足( ) 才可能发射X射线。

9、The staff can check the passengers’ baggage on the( ).

8、A:( )

7、The number code of Aeroflot Russian International Airlines is( ).

8、Which of the following is liquid article?

7、Which of the following is not liquid article?

10、Which of the following is VIP?

9、( ) is used for personal search.

7、The article that can explode easily is( ).

6、Which of the following is the flight number of Air China?

7、Baggage that the passenger can carry onto the plane and keep with him in the passenger compartment of the aircraft is usually called( ).