Mostpeoplewillansweraringingphone.Usuallyyoudon’tknowwh...
问题详情：Mostpeoplewillansweraringingphone.Usuallyyoudon’tknowwhoisphoningorhowurgenttheirbusinessis,soaringingphoneisdifficulttoignore.Inoneexperiment,aresearcherwrotedownthenumbersofseveralpublicpho...