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
单项选择题 The only wire rope termination which may be made in the field is（）.
单项选择题 Nylon line is better suited than manila for（）.
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（）.
