Theideaofgivingblood的精選

問題詳情：Theideaofgivingbloodisverysimple,thatideahassavedmanythousandsoflivesoverthepastcentury.Doctorshavebeencarryingoutbloodtransfusionsforhundredsofyears.___41___.起初,他們從綿羊身上抽血.Butthatwa...