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单选题

92、船舶的有效功率是指:

A
 主机发出的功率
B
 主机功率传递至主轴尾端,通过船尾轴管提供给螺旋桨的功率
C
 克服船舶阻力而保持一定船速所需要的功率
D
 制动功率

答案解析

正确答案:C
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