Book5Unit1GreatscientistsArchimedes,AncientGreek(287-212BC),amathematician.CharlesDarwin,Britain(1808-1882).ThenameofthebookisOriginofSpecies.ThomasSavery(1650-1715)wasanEnglishmilitaryengineerandinventor.ThomasNewcomen(1663-1729)wasanEnglishblacksmith,whoinventedtheatmosphericsteamengine,animprovem...

时间:2024-11-20 06:59栏目:中学教育