單項選擇題If there are a number of survivors in the water after abandoning ship，they should（）.

A.tie themselves to the unit so they won't drift with the current
B.form a small circular group to create a warmer pocket of water in the center of the circle
C.send the strongest swimmer to shore for assistance
D.form a raft by lashing their life preservers together


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2.單項選擇題If it is impossible to avoid a hurricane in the Northern Hemisphere，the most favorable place to be when the storm passes is in（）.

A.the dangerous semicircle
B.the eye (center) of the storm
C.that half of the storm lying to the right of the storm's path
D.that half of the storm lying to the left of the storm's path

3.單項選擇題Following a collision or accident，the Master of each vessel involved must render assistance to persons affected by the collision or accident（）.

A.if he can do so without any risk to his vessel
B.if he can do so without undue delay
C.if he can do so without serious danger to his vessel or to individuals on board
D.without regard to any danger to his vessel

4.單項選擇題Each hose in the fuel transfer system for helicopter refueling must have a（）.

A.static grounding device
B.quick-disconnect nozzle
C.splash guard
D.vapor recovery system

5.單項選擇題During storm conditions on a vessel，the mooring tensions should be adjusted so that（）.

A.all mooring lines have a different tension
B.the leeward lines have higher tension than the windward lines
C.the maximum tension of the most heavily loaded line does not exceed the safe working load
D.all horizontal tension forces on the windward lines are no greater than the vertical tension forces