单项选择题
The frequency（）the safety message will be transmitted shall be included in DSC safety call.
A.which
B.on which
C.at which
D.in which
点击查看答案&解析
相关考题
-
单项选择题
We consider（）send a helicopter with medical facilities to the distress area.
A.it necessary
B.it is necessary
C.it necessary to
D.necessary -
单项选择题
Radiotelephony communication or radio telex communication or both will be carried out by terrestrial or satellite means,（）the equipment fitted on ship and the area in which the incident occurs.
A.depend on
B.depending on
C.dependent on
D.depended on -
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
