A.duty
B.on duty
C.at duty
D.in duty
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A.overall
B.over
C.all
D.task
A.keep
B.keeping
C.keeps
D.is keeping
A.do
B.did
C.does
D.to do
A.has
B.have
C.there is
D.there are
A.to keep
B.are keep
C.is keeping
D.are keeping
最新試題
The company should establish and maintain procedures to control all documents and date which are relevant to（）.
In the Northern hemisphere northerly winds may cause temperature（）.
The mean draft of a ship is the draft（）.
Which of the following is not a form of precipitation?（）
The circulation around a low pressure center in the Northern Hemisphere is（）.
It is dangerous for vessels without the operational radar（）the estuary.
Full details of all lights and fog signals are shown on（）.
Manoeuvring information can not be obtained from（）.
Which of the following shall not the officers in charge of the navigational watch do?（）
Fog is likely to occur when there is little difference between the dew point and the（）.