73、以下属于爆炸物的有( )。

12、A: Are you going to take a domestic or an international flight?

68、A: What’s the( ) of the delay?

31、X射线机灰度分辨力用英文表示为( )。

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( )?

15、设备能分辨单根实芯镀锡铜线的能力,一般用线的标称直径( )和线号( )表示是( )的定义。