单项选择题
A snatch block is a（）.
A.block used only with manila rope B.chock roller C.hinged block D.strong block used for short，sharp pulls
单项选择题 A smooth，tapered pin，usually of wood，used to open up the strands of a rope for splicing is called a(n)（）.
单项选择题 A short splice in a line（）.
单项选择题 A sail hook is used for（）.
