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單項(xiàng)選擇題

A bench hook is used for（）.

A.handing of cargo cases
B.handing oilskings
C.sewing canvas
D.splicing small stuff

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單項(xiàng)選擇題

A block that can be opened at the hook or shackle end to receive a bight of the line is a（）.

A.bight block
B.gin block
C.heel block
D.snatch block

單項(xiàng)選擇題

A buoy having red and green horizontal bands would have a light characteristic of（）.

A.group occulting
B.composite group flashing
C.Morse letter A
D.quick flashing

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