题目内容
（请给出正确答案）
[单选题]
关于发动机有效转矩的说法,正确的是（）
A.是曲轴对外输出的扭矩
B.用Te表示,单位为N●mm
C.大小与发动机转速无关
D.当功率一定时,与转速成正比
提问人：网友hanxiucaoye
发布时间：2022-01-07
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B．用Te表示,单位为N●mm
C．大小与发动机转速无关
D．当功率一定时,与转速成正比
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