单项选择题

Instead of whipping an end of a line，a temporary means of preventing the line from unraveling is to tie a（）.

A.becket bend
B.blackwall hitch
C.figure-eight knot
D.square knot

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单项选择题

A.Wire
B.Manila
C.Nylon
D.Chain

单项选择题

A.coil it counterclockwise
B.not coil it
C.take a turn under
D.twist out the kinks under a strain

单项选择题

A.Length of link in inches
B.Diameter of metal in link in inches or centimeters
C.Links per fathom
D.Weight of stud cable in pounds