單項(xiàng)選擇題

Chart legends printed in capital letters show that the associated landmark is（）.

A.inconspicuous
B.conspicuous
C.a government facility or station
D.a radio transmitter

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Channel 13 is primarily used for ship to ship communication. Channel 13 is also authorized for（）.

A.coast to aircraft operational communications
B.aircraft to ship operational communications
C.lock & bridge communications
D.aircraft to ship navigational communications

單項(xiàng)選擇題

Changing rescuers while carrying out artificial respiration should be done（）.

A.without losing the rhythm of respiration
B.only with the help of two other people
C.by not stopping the respiration for more than 5 minutes
D.at ten minute intervals