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高中英语人教版选修8Unit3InventorsandinventionsReading课件(系列三)

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nson’s“Rocket”Anamphibiouscar(2003)Thisisthefirstcarthatcantravelsafelyonwaterandonland.Whenmovingonwater,thewheelsofthecarturnsidewaysandmoveintothebody.Theunderneathofthecarisstrongenoughtosailasaboat.Itisaprototypeandisnotyetbeingproducedforsale.Thisisaninterestingmoderninvention.Stephenson’s“Rocket”(1781-1848)eStephensonwasoneofthefirstmentodesignenginesfortherailwayswhichwerenewatthattime.OneofthefirsttrackstobelaidwasbetweenStocktonandDarlington.Stephensonwasoneofthefirstrailwayengineersandin1825hedrovethefirsttrainalongtheline.DNAThestructureofDNAThiswasdiscoveryofFrancisCrickandJamesWatsonandpublishedin1953.ThesetwoscientistwerethefirsttoshowthatourgenesconsistoftwospiralsofDNA(calledthedouble-helix).Thisworkleddirectlytothehumangenomeprojectin2003,whichdiscoveredtheStructureofDNA.

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