NASAismovingaheadwithplanstoputalong-armedLanderonMars’...
问题详情:NASAismovingaheadwithplanstoputalong-armedLanderonMars’icyNorthPoletosearchforcluesforwaterandpossiblesignsoflife.The$386millionPhoenixMarsisplannedtotouchdownintheMartianarcticin2008.Thestat...