62、下列关于史密斯海曼Hi-scan6040i机型X射线机功能键说法正确的有( )。

　有机物无机物剔除键左边为有机物剔除键

　有机物无机物剔除键右边为无机物剔除键

　按下黑白彩色转换键后彩色图像转换成黑白图像

　按下超级增强键实现低吸收率和高吸收率物体同屏显示最佳对比度

正确答案：CD

19、Instead of “Please erect your trunk on the conveyor belt”, we can also say( ).

18、CA973 is the( ).

17、I’m afraid you have to stay here for the night, but the airline( ) your meals and accommodations.

16、A: Do you know why my flight has been delayed?

17、Sorry, sir. As an airport staff working in the restricted area, you should wear your( )on your uniform during working hours.

16、The ( )can be exempt from security screening.

15、( )means saying sorry to someone that you’ve hurt them or caused trouble for them.

14、( ) is the place where airplanes take off or land.

13、Please go to the airline counter to( ).

31、X射线机单次检查吸收剂量用英文表示为( )。