- 问题详情:Scientistshavedevisedawaytodetermineroughlywhereapersonhaslivedusingastrand(缕)ofhair,atechniquethatcouldhelptrackthemovementsofcriminalsuspectsorunidentifiedmurdervictims.Themethodreliesonmeasuringhowchemicalvariationsindrinkingwatershowupin...
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