单项选择题

The strongest of the natural fiber ropes is（）.

A.Nylon
B.Dacron
C.Manila
D.Sisal

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单项选择题

A.forming temporary eyes in lines
B.joining two lines of equal size
C.keeping line from unlaying or fraying
D.joining two lines of different size

单项选择题

The rope which is rove from the truck to be used with a bos’n chair is called a（）.

A.gantline
B.life line
C.strop
D.whip

单项选择题

The rolling hitch could be used to（）．

A.join two lines of different sizes
B.join two lines of equal sizes
C.add strength to a weak spot in a line
D.act as a stopper to transfer a line under strain