工业调节器的基本运算规律有哪些？
参考答案：
工业调节器的基本运算规律有比例（P）运算，比例积分（P1）运算和比例积分微分（PID）运算。
The earliest packet-switched network that connected a few universities and research centers was known as ARPANET. ( )
论述概略养分分析体系的优缺点。
