74、以下说法正确的是( )。

　含烃类气体的卷发器,每位旅客或机组人员可携带一支

　卷发器的安全盖必须紧扣于电热元件上

　在任何时候卷发器都不得在飞机上使用

　含烃类气体的卷发器的充气罐不得装入托运行李或手提行李

正确答案：ABCD

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。

5、The two letter code of Alitalia is( ).