A.frequent
B.so frequent
C.frequent that
D.so frequent that
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A.keeping a close watch and lookout
B.taking a radar range and bearing
C.observing a radar target and listening to signals
D.keeping a well clear caution
A.from
B.on
C.in
D.of
A.a continuous ringing for 10 seconds
B.one short ring followed by one long ring
C.two long rings of at least 20 seconds
D.a continuous ringing until the fire is extinguished
A.gives up
B.gives away
C.gives in
D.gives off
A.the chief engineer
B.the person about whom the entry concerns
C.one other crew member
D.no other signature is required
最新試題
Which wind results from a land mass cooling more quickly at night than an adjacent water area?（）
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ECDIS must be able to perform all of the following EXCEPT（）.
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The dew point temperature is（）.
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