目的探讨处女膜闭锁的超声诊断价值.Objective To probe into the value of imperforate hymen diagnosed by ultrasound.有一些女性就完全缺乏处女膜.In some cases , the hymen is even absent altogether.目的: 总结青春期处女膜闭锁的CT表现.Purpose : To investigate the CT featur...
Recently, in International Chemical Olympiad ( IChO ) competition microscale chemical experiment appears frequently.国际化学奥林匹克 ( IChO ) 竞赛中微型化学实验出现频数增多.Microscale reaction technology was reviewed and its prospect in nanoma...