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單項(xiàng)選擇題

What type of line melts easiest（）.

A.Wire
B.Dacron
C.Nylon
D.Polypropylene

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單項(xiàng)選擇題

What should you do to a line to prevent fraying where it passes over the side of the vessel（）.

A.Worm that part of the line
B.Splice that part of the line
C.Cover it with chafing gear
D.Install a cleat

單項(xiàng)選擇題

What material may be substituted for zinc when making a poured metal socket ending to a wire rope（）.

A.Lead
B.Babbitt
C.Solder
D.Nothing