54、引信按受外力分为压发引信、拉发引信和( )引信等。

24、证件防伪方法中,油墨防伪技术有( ) 防伪。

23、关于第一代居民身份证印章 ,下列叙述正确的是( )。

22、中东地区国家,由于多信奉( ),打招呼时的第一句话就是:“真主保佑”,以示祝福。

21、忌讳在别人面前袒胸露背的民族是( )。

20、All cargo intended for carriage on passenger or cargo flight shall ( )or go through other security measures before loading.

19、Please form a queue and pass the gate( ).

18、An air ticket is only( )for the passenger whose name appears on the ticket.

17、The article that can burn easily is( ).

16、If you haven’t got a boarding pass, please go to the airline counter to go through the( ) first.

15、A: Could you tell me why the flight to Beijing has been( )?