35.In order to ensure the propulsive efficiency and to obviate the use of heavy-duty reduction gearboxes,what is the developing trend for the ship propulsive system?
(A)Adopt low speed propulsive diesel engine that drives the propeller directly.
(B)Adopt high speed propulsive engine that drives the propeller directly.
(C)Adopt gas turbine engine as the propulsive engine that drives the propeller directly.
(D)Develop the combined power plants that directly drive the propeller at high speeds.