单选题柴油机功率与转速按三次方成正比关系的运转工况称()。直接驱动螺旋桨的主机是按()运行的,其特点是柴油机发出的功率和转速()。A螺旋桨工况/负荷工况/都是改变的B螺旋桨工况/螺旋桨工况/都是改变的C面工况/螺旋桨工况/都是不变的D负荷工况/面工况/都是改变的
单选题
柴油机功率与转速按三次方成正比关系的运转工况称()。直接驱动螺旋桨的主机是按()运行的,其特点是柴油机发出的功率和转速()。
A
螺旋桨工况/负荷工况/都是改变的
B
螺旋桨工况/螺旋桨工况/都是改变的
C
面工况/螺旋桨工况/都是不变的
D
负荷工况/面工况/都是改变的
参考解析
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