The physical properties of rubber accelerator 2 - mercapto benzothiazole and main methods for its preparation are introduced.介绍橡胶硫化促进剂 2- 巯基苯并噻唑的物理性质和主要的制备方法....
He had been bitten by a rattlesnake.他被响尾蛇咬过。Rattlesnake skin is used for fancy bags and purses.响尾蛇皮被用来制作精美的提包和钱包.The renegade is the first cousin to a rattlesnake.叛徒象响尾蛇一样地毒狠....
经口和经鼻这两种途径插管所测量的方法相同.The method of measurement is the same for oral or nasal insertion.需要插管及辅助呼吸.Intubation and assisted respiration will be required.有的病人的气管在任何情况下都是很难、或根本不可能插管的.The trachea in some patients is difficult ...