單項選擇題If your vessel is dragging her anchor in a strong wind,you should().

A.shorten the scope of anchor cable
B.increase the scope of anchor cable
C.put over the sea anchor
D.put over a stern anchor


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1.單項選擇題Production of mechanical foam by a portable in-line foam proportioner().

A.increases the size of foam bubbles formed
B.increases the rate of foam production
C.improves the extinguishing properties of foam
D.gives the nozzleman more freedom of movement,since it can be placed anywhere in the hose line

2.單項選擇題Marline is().

A.four-stranded sisal line
B.three-stranded cotton line
C.sail twine
D.two-stranded hemp cord

3.單項選擇題LIFTING THE ANCHOR FROM THE BOTTOM is called().

A.broaching the anchor
B.shifting the anchor
C.walking the anchor
D.weighing the anchor

4.單項選擇題It’s not advisable to cut()the power supply.

A.out
B.off
C.down
D.away

5.單項選擇題It was demanded that the injured crewmembers()at once.

A.was treated
B.would be treated
C.being treated
D.be treated