Asweknow,DNAtestingisveryusefulforcrimefighting.Butnowc...
問題詳情：Asweknow,DNAtestingisveryusefulforcrimefighting.Butnowcrimefighterscouldhaveanewtoolathand.Researchershavedevelopedacutting-edge(前沿的)techniquetoidentifyhumanhair.TheirtestisquickerthanDNAan...