【判断题】2017年青海省农村常住居民人均可支配收入9462元,比上年增长9.2%
【单选题】_______T细胞能直接攻击带异抗原的肿瘤细胞和病毒感染的细胞。
【单选题】In radiotelephony,the spoken word for distress is ().
【判断题】2017年青海省农村常住居民人均可支配收入9462元,比上年增长9.2%。( )
【简答题】S1:MAYDAY,MAYDAY,MAYDAY.This is MV Blue Sky.I have collided with an unknown object.I am sinking.Over.S2:MV Blue Sky,this is Eastern station.Report your position.Over.Q:What has happened to MV Blue Sky...
【单选题】The term Mayday is explained as ___ in the radio regulations.
A.
M’aider in French which means “help me”
B.
mayday holiday in English which means “rest day”
C.
maybe a day which all vessels navigate in a same area
D.
the same pronunciation in other languages
【单选题】Mayday is to be used to announce ______.
【单选题】MAYDAY is to be used to announce________.