單項(xiàng)選擇題（）is used for lifting cargo.

A.A mooring winch
B.A windlass
C.A deck crane
D.A lifeboat


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1.單項(xiàng)選擇題The original equilibrium position is stable when（）.

A.metacentric height is positive
B.metacentric radius is positive
C.KG exceed maximum allowable limits
D.Free surfaces are excessive

2.單項(xiàng)選擇題Emergency escape breathing device on board shall have a duration of service no less than（）.

A.20 minutes
B.15 minutes
C.10 minutes
D.5 minutes

4.單項(xiàng)選擇題The master shall ensure that any seafarers（）are provided with an adequate period of rest.

A.who have performed work for 14 hours
B.who have performed work in a scheduled rest period
C.who have performed work in a scheduled work period
D.who works hard

5.單項(xiàng)選擇題The hatch at the after end of the canopy in a lifeboat（）the after lifting hook, painter, and tow line.

A.give access to
B.links up with
C.have contact with
D.is constructed of