单项选择题
The sprocket wheel in a windlass，used for heaving in the anchor，is called a（）.
A.capstan B.dog wheel C.fairlead D.wildcat
单项选择题 The sprocket teeth on a wildcat are known as the（）.
单项选择题 The ratio of the height of a vessel’s rudder to its width is referred to as the（）.
单项选择题 The projecting lugs of the rudderpost which furnish support to the rudder are called（）.
