单项选择题
A short splice in a line（）.
A.decreases the size of the line B.should be used if the line is going through a block C.should only be used in wire rope D.doubles the size of the line
单项选择题 A sail hook is used for（）.
单项选择题 A rolling hitch can be used to（）.
单项选择题 A J-chaser is used to（）.
