单项选择题
Distress traffic is the communication（）between the station in distress and the ships, aircraft, coast radio stations, coast earth stations and rescue centers participating in the rescue work.
A.exchange
B.to exchange
C.exchanging
D.exchanged
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Monitoring is especially important in a highly automated system which is dependent on careful（）procedure and format.
A.adherence to
B.adoption to
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The rescue coordination center may（）on stations which interfere with traffic.
A.keep silence
B.forbid transmission
C.change information
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Particular care should be（）in selecting CESs in areas where Ocean Regions overlap.
A.taken
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C.took
D.taked
