电抗器在电力系统中用于()、()。
参考答案:限制短路电流;无功补偿和移相
The Customs shall reply in writing within () from the date of receipt of the application for the refund of the duty paid and notify the applicant of its decision.
A. one month
B. two months
C. three months
D. six months
把握政治统治权的哲学家被称为下面哪一项?()
A、国王
B、哲学王
C、伦理王
D、文化王