77、以下可能含有干冰的有( )。

31、X射线机泄漏射线量率用英文表示为( )。

16、An air carrier shall prevent( )access to cargo accepted for transportation on an aircraft.

15、——( )
——Not at all. But I’ve only got some clothes and some other things in it.

14、——( )
——OK. Here you are.

13、——Which flight are you going to( )?
——Flight MU875.

12、Please go through that gate ,the staff may give you a( ).

11、A: When will Flight MU523 be ready for check-in?

31、被辐照物质接受一次辐照所吸收的X射线能量是( )的定义。

21、Please separate these bags and put them on the( ),which will take them to be screened by X-ray equipment.

20、——How long will the search take?
——It depends. If you don’t have any( ), it will be very quick.