作为判据dP/dδ>0主要应用于分析简单系统的()。
A.暂态稳定
B.故障计算
C.静态稳定
D.调压计算
参考答案:C
—Why didn't you come to the cinema with us last Saturday?
—Oh, sorry.But I________the film.[ ]
A. see
B. saw
C. have seen
D. had seen
()以其元初为六经之长。
A、《尚书》
B、《周易》
C、《春秋》
D、《礼仪》