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單項(xiàng)選擇題

A sheave is a（）.

A.grooved wheel in a block
B.line to hold a lifeboat next to the embarkation deck
C.partial load of grain
D.sesman's knife

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單項(xiàng)選擇題

A smooth, tapered pin, usually of wood, used to open up the strands of a rope for splicing is called a (n)（）.

A.batten
B.bench hook
C.stabilizers
D.fid

單項(xiàng)選擇題

A solution to overcome tripping defects is an arrangement of special plates on either side of the flukes, designed to set them in the correct tripping position. These special plates are called（）.

A.trippers
B.stocks
C.awl
D.palms

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