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Howdopeoplefindtheirways?Atfirst,peoplediditbylookingat...
问题详情:Howdopeoplefindtheirways?Atfirst,peoplediditbylookingatthesun,themoonandstars.Later,westartedtousethecompass(指南针).Today,therearenavigationsatellitesystems.Anavigationsatellitesystemusesgroups...