55、下列关于X射线开关机规程描述正确的是( )。

　开启X射线机电源,观察运行自检测程序正常后,开始检查工作

　检查中,如遇设备发生故障,应立即报告现场值班领导

　有些机型需要先退出X射线机操作平台,待图像存储完成后,再关闭X射线机电源及稳压电源

　工作结束后,按要求认真填写设备维修记录

正确答案：ABC

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( ).

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 ( )