51、对腐蚀品主要特征描述正确的是( )。

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。

10、在候机楼隔离区安全监控的程序中,清场完毕后,按分工把守( )工作人员通道,检查出入人员。

9、根据爆炸装置的处置原则,( )有资格实施排爆。

8、下列物品中,允许乘机旅客限量随身携带的是( )。