大、中型直流异步电动机定子绕组一般用（）制造
A、漆包铜线
B、绝缘铝线
C、扁铜线
D、扁铝线
参考答案：C
－It was careless of you to leave out some important information．
－Oh, my god! _______．
A．So were you
B．So I did
C．So did I
D．So was I
BAS4／320—25型板框压滤机中“4”表示（）。
A.过滤面积是4m2
B.滤框厚度为4mm
C.滤板数为4片
D.装料容积为4m3
