听力原文:M: Can you speak German?
W: Yes, I can. I speak it very well. But I know a little Italian.
Which of the following does the woman know?
A.A little Italian.
B.A little German.
C.A little English.
第8题
交流异步电动机在进行基频以下的变频调速时,均采用压频比恒定的控制方式,即恒转矩调速方式。()
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