单项选择题
A rope made of a combination of wire and fiber is known as（）.
A.independent B.lang lay C.preformed D.spring lay
单项选择题 A permanent chain chasing system is used to（）.
单项选择题 A pelican hook（）.
单项选择题 A long pole with a hook at one end，used to reach for lines，is known as a（）.
