The external flotation bladder of an immersion suit should be inflated ______.
A.only after two hours in the water
B.only after four hours in the water
C.before entry into the water
D.upon entry into the water
第2题
A.the operator's representative
B.the crew required by the Certificate of Inspection
C.the galley personnel
D.the designated person in charge
第3题
A.measured from due south clockwise 180°
B.measured from due south counterclockwise 180°
C.to the left of the storm's track
D.ahead of the typhoon measured from the storm's track to 90°on each side
第4题
A.slip
B.sidewise force
C.rotational force
D.thrust
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