51、测试紫光灯是否处于正常工作状态的正确描述是( )。

41、( )is carried out for the passenger’s own safety.

40、Hello, sir, please get ready your( ) for checks.

47、Procedures for the proper control and screening of checked baggage are designed to prevent( )from being introduced into the baggage compartment of an aircraft.

46、No rush, sir, the plane will take off in 15 minutes, there’s still( )left.

45、I’m sorry, sir. Your identity card( ). Do you have any other means of identification?

46、Which of the following are NOT right?

45、Before checking in the baggage, it’s best for the passenger to( ).

44、In order to improve checking speed,passengers in tourist group,please( ) according to the list of plane tickets.

43、——( )
——I am going to Lhasa.

45、Sir, please( ).