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
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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
A.base
B.under part
C.bottom
D.down place
A.suffocate the fire
B.absorb the oxygen supporting the fire
C.act as a cooling agent
D.wash the fire away
A.guy failures
B.topping lift failures
C.bending of the boom from compression
D.gooseneck failure
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When the wave period and the apparent rolling period are the same（）.
The loading of the ship must be done in accordance with（）.
It is dangerous for vessels without the operational radar（）the estuary.
Bales close to the deckhead should be covered to prevent（）.
Fog is likely to occur when there is little difference between the dew point and the（）.
Which wind results from a land mass cooling more quickly at night than an adjacent water area?（）
（）is halfway between the forward and after perpendiculars and is reference point for vessel construction.
Which of the following is not an operation mode of AIS?（）
Despite the rising importance and great convenience of the gyrocompass,the magnetic compass still retain its importance because of its（）.
The force resulting from the earth’s rotation that causes winds to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere is called（）.