A.rapidly improving weather
B.deteriorating weather
C.a severe low pressure system
D.fair weather and calm
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A.L
B.N
C.T
D.Z
A.a code hoist to indicate Greenwich mean time to follow
B.the letter G
C.the letters GT
D.the letter Z
A.darkening，growing in size and forming an anvil top
B.that shows extensive vertical development
C.creating cold downdrafts that are felt on the ground
D.All of the above
A.administer oxygen
B.immediately check his pulse and start CPR
C.make the victim comfortable in a bunk
D.immediately give a stimulant，by force if necessary
A.longitudinally framed
B.transversely framed
C.cellular framed
D.web framed
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Fearing damage from either or both of the above incidents，the Master now（）me this note of protest，reserving to himself the right to extend same at time and place convenient．
A single line of position combined with a dead-reckoning position results in a(n)（）.
How does an inert gas system on a tanker function to prevent explosions in cargo tanks? （）
A sign of thunderstorm development is a cumulus cloud（）.
A sail hook is used for（）.
A semisubmersible with a negative GM flops to an angle of（）.
A single vessel being towed alongside shall exhibit（）.
A Master would be well advised to file a note of protest if（）.
According to the regulations，what type of gauging is required for a cargo of butadiene? （）
A safety feature provided on all inflatable liferafts is（）.