单项选择题The Anti-Japanese War was the turning point in Chinese history which marked the close of the ancient period and the beginning of the modern history. ( )A.对B.错
单项选择题250. 在PID调节规律中,哪一种是基本的调节规律。 A、比例作用 B、积分作用 C、微分作用 D、三种都是