单项选择题
The load chart of a crane enables the operator to combine the load radius with boom length to determine the（）.
A.maximum counter weight required B.minimum horsepower required C.hoist rope strength D.allowable load
单项选择题 The garboard strake is the（）.
单项选择题 The function of the bilge keel is to（）.
单项选择题 The fore and aft run of deck plating which strengthens the connection between the beams and the frames and keeps the beams square to the shell is called the（）.
