单支红色发光二极管表示电源已接通。A single red LED shows that the power is switched on.按这种方式使用的二极管叫做整流管.A diode used in this manner is called a rectifier.二极管早已作为常规器件应用于多种电路中.The diode is used routinely in many kinds of electronic circuit...
It indicates that bollon dilator has good long term effectiveness for postoperative anastomotic stricture.结果显效率为87.8%,且无复发,远期疗效甚佳.Objective : To investigate the conservative treatment in patients with intrathoracic esoph...
He bought me a bagful of sweets.他给我买了一包糖.He was caught in the act of stealing the sweets.他正在偷糖时被抓住了.a yen for sweets想吃糖果She dipped a hand into the jar of sweets and pulled one out...她把手伸进糖果罐，摸出了一颗糖。Sweets should be cut o...