Objective To study the relationship between recurrent respiratory infection ( RRI ) and gastroesophageal reflux ( GER ) in children.目的 探讨小儿反复呼吸道感染 ( RRI ) 与胃食管返流 ( GER ) 的关系.OBJECTIVE To investigate the effect of Hath 1 ...
A schoolboy miraculously survived a 25 000-volt electric shock.一名男学生在遭受2.5万伏的电击后奇迹般地活了下来。The units in which we show voltage and current are volt and ampere respectively.我们用以表示电压和电流的单位分别为伏特和安培。Where the volt is too large ...