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
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A permanent chain chasing system is used to（）.
A.clean anchor chain as it's hauled in
B.recover anchors which have lost their buoys
C.run and retrieve anchors
D.prepare anchor chain for inspection -
单项选择题
A pelican hook（）.
A.can be released while under strain
B.is used for boat falls
C.is used for extra heavy loads
D.is used for light loads only -
单项选择题
A long pole with a hook at one end，used to reach for lines，is known as a（）.
A.pike pole
B.jack staff
C.line rod
D.hooker
