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


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1.單項(xiàng)選擇題After reporting a casualty to a mobile offshore drilling unit，which record must be retained on board? （）

A.Record of drafts
B.Hull reports
C.Anchor record
D.Machinery repair book

2.單項(xiàng)選擇題After putting on a self-contained breathing apparatus，you open the air supply and hear a continuous ringing of a bell. What does this mean? （）

A.The unit is working properly
B.The face mask is not sealed properly
C.The air bottle needs to be refilled
D.The air supply hose has a leak

3.單項(xiàng)選擇題According to the Chemical Data Guide，epichlorohydrin is a(n)（）.

A.corrosive
B.class B poison
C.oxidizer
D.explosive

4.單項(xiàng)選擇題A space should be ventilated when（）.

A.The cargo's temperature is colder than the dew point of the air in the space
B.The cargo's temperature is warmer than the dew point of the air in the space
C.The dew point of the air in the space is lower than the dew point of the outside air
D.All of the above

5.單項(xiàng)選擇題（）is the most liable to spontaneous combustion.

A.Cement
B.Chinaware
C.Fish meal
D.Steel products