unit4listeningandspeaking课件
日期：2010-01-17 01:27
Unit4GreenworldpeonyJasmineHepcereusTulipSunflowerWhowillyouthinkofaboutbotany?OntheOriginofSpeciesPre-readingThespeciesofrosesListeninginthe18thcentury，andtakeHealsowithfoodsuchasvegetables，andhardbiscuitsThesailorshardlyateanyvegetablesorfruitItwasnotunusualthat80％ofthecrewdiedonsuchvoyagesThehealthofthesailorswasthemajorofacaptainEvenstayhealthytookawayconsistedoffreshconcernJamesCooktriedmanywaystokeephismenHewasoneofthefirsttotellthemtocleantheirclothesandtheship，peoplehadnotdiscoveredwhytheyneededtoeatfruittoLongvoyagespeople-fromhomeformanyyearsThedietaboardshipsaltmeat，whenVitaminCwasdiscovered，butitwasn’tuntil1932，carrotandfruitjuiceandbeansIthelpalittle，preservedcabbage，anddoctorsrealizedthatthesolutioneating，
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