单项选择题
Chafing gear is used to（）.
A.anchor the boat B.pick up heavy loads C.protect fiber rope from abrasion D.strengthen mooring lines
单项选择题 A stopper used in securing the ground tackle for sea that consists of a grab attached to a turnbuckle is a（）.
单项选择题 A stage should only be rigged（）.
单项选择题 A snatch block is a（）.
