56、X射线机自检过程中提示未清空通道或光障未对准的提示,解决方法有( )。

　检查通道内有无异物或光障上有无遮挡物

　如有异物或遮挡物则取出或移除后重新开机

　移开磁性物质,显示器关闭后再打开

　正确连接电源插头或接口,再进行开机操作

正确答案：AB

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( ).

44、Which of the following cannot be taken on the plane?

43、Which of the following can be exempted from security check?

49、Generally speaking,( )should have a valid permit when he needs to enter the departure lounge.

48、After security check, it is best for the screeners to say ( )

47、( )should be taken out before a passenger passes through the walk-through metal detector.