单项选择题

Serving is（）.

A.Marline or ratline wound along the grooves of a rope
B.Narrow strips of light canvas or cotton cloth spiral-wrapped along the rope
C.Marline tightly wound on the rope by means of a board or mallet
D.A splice made by laying the strand of one rope into the vacated grooves of another rope

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Safety goggles or glasses are NOT normally worn when（）.

A.using a rotary grinder with an installed shield
B.letting go the anchor
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Manila lines in which the strands are right-hand laid（）.

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In the manufacture of wire rope，if the wires are shaped to conform to the curvature of the finished rope before they are laid up，the rope is called（）.

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D.preformed