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