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單項(xiàng)選擇題

（）is not suitable for bagged cargo?

A.The hydraulic crab
B.The rope sling
C.The canvas sling
D.The cargo tray

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單項(xiàng)選擇題

（）is the most visible signal of distress from a lifeboat at sea in the daytime.

A.Smoke signal
B.Flash signal
C.Fire signal
D.Radio emergency transmission

單項(xiàng)選擇題

（）that kind of weather persist, it would be very likely that the two vessels would touch each other.

A.If
B.Would
C.Shall
D.Should

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