单项选择题
A towing vessel’s capability is BEST measured by horsepower，bollard pull，maneuverability and（）.
A.displacement B.stability C.towrope pull D.propeller design
单项选择题 A thrust block is designed to（）.
单项选择题 A simplified construction plan may be included in the ship construction portfolio provided it adequately defines the（）.
单项选择题 A Kort nozzle is a(n)（）.
