單項(xiàng)選擇題All ships（）suspected infectious disease on board should radio information to Port Health Officer.

A.with
B.has
C.have
D.had


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1.單項(xiàng)選擇題After sending a message describing the symptoms of an ill crew member，you receive a message containing the code MRL. This means（）.

A.Apply ice-cold compress and renew every 4 hours
B.Commence artificial respiration immediately
C.Give enema
D.Pass catheter into bladder

2.單項(xiàng)選擇題A safe fuel system must（）.

A.prevent engine overheating
B.have proper air/gasoline fuel mixture ratio
C.be liquid- and vapor-tight
D.supply sufficient air to the intake manifold

3.單項(xiàng)選擇題A large vessel is equipped with a controllable pitch propeller. Which statement is TRUE?（）

A.When dead in the water，it is often difficult to find the neutral position and slight headway or sternway may result
B.When going directly from full ahead to full astern，there is complete steering control
C.When the vessel has headway and the propeller is in neutral，there is no effect on rudder control
D.When maneuvering in port，full ahead or astern power can usually be obtained without changing shaft RPM