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單項(xiàng)選擇題

“Full speed ahead” and “Full speed astern” are（）given by the officers or the pilots.

A.sailing orders
B.speed orders
C.wheel orders
D.telegraph orders

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單項(xiàng)選擇題

（）port anchor，one shackle in water.

A.Throw
B.Heave in
C.Cast off
D.Let go

單項(xiàng)選擇題

You must（）your cable to 5 shackles.

A.cut
B.short
C.be short
D.shorten

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