通过实例探讨了正反馈在放大电路中的应用.This paper discusses the application of positive feedback in amplifiers.正反馈放大器是信号级 脉冲形成电路 的基础.Amplifiers with positive feedback are the bases of signal - grade pulse - forming circuits .这种控制方法虽然是有效的, ...
帕萨迪纳坐落于圣加布里埃尔山麓的丘陵地带。Pasadena lies in the foothills of the San Gabriel mountains.房子坐落在莫尔文丘陵地区，周围景色迷人。The house is in a lovely setting in the Malvern hills.从我们的房子里向外望去，景色宜人，一直能看到科茨沃尔德丘陵。Our house has got a splendid view a...
What is symptom of hypertensive patient early days, the hand bilges is! This what is treated.高血压患者前期症状是什么, 手胀是不是啊! 该什么治疗.Gallons of sea water had rushed into the cabin and were now swilling about in the bilges.大量海水冲入了船舱，...
有700多万股换手，是通常日平均成交量的3倍。More than 7 million shares changed hands, treble the normal daily average.昨天拍卖之前的成交量很小。Trading was very light ahead of yesterday's auction.这产品的成交量很高, 每天可出三批货.This product has a fast turnover, ...