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1、語言積累交際用語話題語言應用-農(nóng)業(yè)說服；勸說（persuasion）I’drather…I’dprefer…because…IfIhaveachoiceI’llchoose…Thisisgoodvaluebecause…It’sbetterto…Idon’tlike…because…Whattheadvantageof…?It’sagreatpitythat…Youneedto…Theadvantagesare…You’lltastethedifferencewhen…話題詞句【高清課堂：】Gettoknowthefarmingsteps(rice)ploughthefieldsows
2、eeds/growyoungplantsinserttheyoungplantsintothefieldspraytheagriculturalchemicalsharvestrice拓展閱讀Americanbeekeepingoperationshavebeenhithardbywhatscientistscallcolonycollapsedisorder.Almosthalfoftheirworkerbeeshavedisappearedduringthepastseason.C.C.D.hasalsobeenreportedinIsrael,EuropeandSouthAmer
3、ica.Beesflyawayfromthehiveandneverreturn.Sometimestheyarefounddead;othertimestheyareneverfound.Manycropsandtreesdependonpollinationbybeestohelpthemgrow.AnewreportsaysavirusmaybeatleastpartlyresponsibleforthedisorderinhoneybeecoloniesintheUnitedStates.ThisvirusiscalledIsraeliacuteparalysisvirus.I
4、twasfirstidentifiedinIsraelintwothousandfour.IanLipkinatColumbiaUniversityinNewYorkandateamreportedthenewfindingsinSciencemagazine.DoctorLipkinsaysthevirusmaynotbetheonlycause.Hesaysitmayworkwithothercausestoproducethecollapsedisorder.Theteamfoundthevirusincolonieswiththehelpofamapofhoneybeegene
5、sthatwaspublishedlastyear.Theyexaminedthirtycoloniesaffectedbythedisorder.Theyfoundevidenceofthevirusintwenty-fiveofthem,andinonehealthycolony.Thenextstepisfurthertestingofhealthyhives.TheresearcherssuggestedthattheUnitedStatesmayhaveimportedthedisorderinbeesfromAustralia.Theysaythebeesmaycarryt
6、hevirusbutnotbeaffected.TheideaisthatunlikemanyAmericanbees,theabilityofAustralianbeestofightdiseasehasnotbeenhurtbythevarroamite.Thisinsectattackshoneybees,whichcouldmakethedisordermorelikelytoaffectahive.Australianbeeproducersrejectthesesuspicions.Andsomeresearcherssuspectthatbeeproductioninth
7、eUnitedStatesisdownmainlybecauseoftheweather.Honeybeesgathernectarfromflowersandtrees.Thesweetliquidgivesthemfoodandmaterialtomakehoney.ButcoldweatherthisspringintheMidwestreducedtheflowofnectarinmanyflowers.Manybeesmayhaves
