电力系统中出现的稳态过电压基本可以分为（）和（）两大类。
参考答案：工频电压升高;谐振过电压
巧辨形近字，轻松来组词。
候( ) 增( ) 拔( ) 谁( )
喉( ) 赠( ) 拨( ) 维( )
_____ my daily work at school, I spare a few hours each day to practice playing the violin at home.
A．Expect for
B．As for
C．Thanks to
D．Aside from
