串联电抗器经常用于无功补偿，并联电抗器通常起限流作用。
参考答案：错
— What about ____ 2008 Olympic Games?
— Oh, it was really ____ great success. [ ]
A. a; a
B. the; a
C. a; the
D. the; the
“超导”是金属在低温时的什么现象？( )
A．电压为零
B．电阻为零
C．电量为零
D．电容为零
