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單項(xiàng)選擇題

The urgency signal concerning the illness of persons on board ship is（）.

A.Mayday
B.Pan
C.Securite
D.Attention

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There are no other vessels in the vicinity（）those at anchor.

A.besides
B.including
C.apart from
D.in addition to

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There is plenty of（）at this area.

A.a room
B.room
C.rooms
D.the room