单项选择题
A deck fitting, used to secure line or wire rope, consisting of a single body with two protruding horns is called a（）.
A.bitt B.bollard C.capstan D.cleat
单项选择题 A deepwell pump is a type of（）.
单项选择题 A definite advantage of using water as a fire extiguishing agent is its characteristic of（）.
单项选择题 A design modification of an anchor chain which prevents kinking is the（）.
