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
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B.be placed between the engines and the foundation to absorb the vibration
C.transmit the thrust of the engine to the propeller
D.transmit the thrust of the propeller to the vessel -
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A.areas where special materials are used
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A Kort nozzle is a(n)（）.
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