Place the mask over your nose and mouth and slip the plastic bag over your head. In a few seconds, the()will begin to flow.
Place the mask over your nose and mouth and slip the plastic bag over your head. In a few seconds, the()will begin to flow.
A.Water
B.air
C.oxygen
正确答案:C
Tag:民航商务英语 国家开放大学民航商务英语 电大民航商务英语
时间:2023-05-03 14:26:24