弹簧储能操动机构的优点有加工工艺要求不高、可靠性高、价格低等。
参考答案：错
癎证发作的基本病理因素是
A．肝气郁结，肝阳上亢
B．肝火偏旺，火动生风
C．痰热互阻，腑气不能
D．风阳痰浊，蒙闭心窍
Your parents are both teachers, ______ they? [ ]
A. are
B. aren't
C. do
D. don't
