A.overall
B.over
C.all
D.task
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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
A.is going to
B.are going to
C.was going to
D.are go to
最新試題
When steering by autopilot,how often should the steering be checked?（）
A tide is called diurnal when（）.
（）is halfway between the forward and after perpendiculars and is reference point for vessel construction.
Despite the rising importance and great convenience of the gyrocompass,the magnetic compass still retain its importance because of its（）.
Before any loading takes place any signs of the previous cargo should do（）.
The helm command PORT TWENTY means（）.
ECDIS must be able to perform all of the following EXCEPT（）.
The dew point temperature is（）.
What is a CORRECT reply to a pilot’s request, How’s your heading?（）
In the Northern hemisphere northerly winds may cause temperature（）.