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高中英语Unit4Exploringplants-Readingtask课件新人教选修9.ppt

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ReadingonP78Co–EvolutionyuccamothTheTraveller’sPalm棕榈树TheMadagascarblacklemurTheOphrysOrchid兰花waspWarmingupPre-readingWhat’sthetopicofthetext?3.Whatdothephotosshowyou?Firstreading2.CanyouguesswhytheTraveller’sPalmhasthatname?3.Whatdoyouthink“sweettooth”means?4.Whydothemalewaspstrytomatewiththeorchidflowers?5.Whydothefemalewaspsvisittheorchidflowers?Dotheyhavearoleinpollination?Plant/pollinatorPlant/pollinatorPlant/pollinatorDiscussionSuggestedanswers:TheTraveller’spalmandtheMadagascarblacklemur:IftheTraveller’spalmdiedout,theMadagascarblacklemurwouldnotdieoutasitcanfindothersourcesoffood.TheOphrysorchidandthewasp:IftheOphrysorchiddiedout,thewaspwouldalsodiedoutasthefemalewaspneedsthechemicalproducedbytheorchidtoattractthemalewasps.