（仁爱版）八年级;Leadin;学生能够掌握与地球和火星相关的词汇，如“diameter”“distance”“averagetemperature”等。;Leadin

;Leadin;Leadin;Pre-writing;;;;;;;;;;;;While-writing;While-writing;While-writing;While-writing;While-writing;While-writing;Post-writing;Post-writing;Summary;;Languagepoints;1.Marslooksredbecauseofit