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
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Nylon line is better suited than manila for().
A.Towing alongside
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单项选择题
Neglecting friction,you desire to lift a 300 kgs weight with a stress on the hauling part of 100 kgs.Which of the following tackles would you use().
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