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【单选题】
能独立生活的最小细胞型微生物是()A.
衣原体
B.
立克次体
C.
支原体
D.
病毒
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举一反三
【单选题】In radiotelephony，the spoken word for distress is ().
A.
Securite
B.
Safety
C.
Emergency
D.
MAYDAY
【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
【多选题】下列语句中比较两个数大小的是( )
A.
test $num1 –ge $num2
B.
[ $num1 –ge $num2 ]
C.
[ $num1 –le $num2 ]
D.
[ $num1 –gg $num2 ]
【单选题】Mayday is to be used to announce ______.
A.
a distress message
B.
an urgency message
C.
a safety message
D.
a message of SMCP
【单选题】MAYDAY is to be used to announce________.
A.
a distress message
B.
an urgency message
C.
a safety message
D.
a massage of SMCP
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