Theelectricmachinethatoperatesatspeedsabovesynchronousspeedworksin()region.A.motoringB.generatingC.pluggingD.stopping
题目
Theelectricmachinethatoperatesatspeedsabovesynchronousspeedworksin()region.
A.motoring
B.generating
C.plugging
D.stopping
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参考答案和解析
参考答案：B