APlanForExploringMar的精选

问题详情：APlanForExploringMarsNASAismovingaheadwithplanstoputalong－armedlanderonMars'icynorthpoletosearchforclues(线索)forwaterandpossiblesignsoflife.TheMYM386millionPhoenixMarsisplannedtotouchdowninth...