牵引变压器低压侧的额定电压为()。
A.110kV
B.220kV
C.110或220kV
D.27.5kV
参考答案:D
There is a ______ of impatience in the tone of his voice.
A. dot B. hintC. notion D. phrase
下列哪项是急性扁桃体炎的局部症状主要表现()
A.咳嗽
B.剧烈咽痛
C.呼吸困难
D.吞咽困难
E.放射性耳痛