配合中的H字母代表孔为基轴制。
参考答案：错
--I don’t know _________ now.
--Her mother says she is much better.
A．what is she
B．where is she
C．who is she
D．how she is
常用的高压供电方式有（）
A.放射式
B.链式
C.树干式
D.环式
