Theideaofgivingblood的精选

问题详情：Theideaofgivingbloodisverysimple,thatideahassavedmanythousandsoflivesoverthepastcentury.Doctorshavebeencarryingoutbloodtransfusionsforhundredsofyears.___41___.起初,他们从绵羊身上抽血.Butthatwa...