人教版高中英语必修第三册精品课件 Unit 4 Space Exploration 晨读晚诵.ppt

本课结束微专题一微专题二微专题三微专题四微专题一微专题二微专题三微专题四微专题一微专题二微专题三微专题四微专题一微专题二微专题三微专题四微专题一微专题二微专题三微专题四微专题一微专题二微专题三微专题四微专题一微专题二微专题三微专题四微专题一微专题二微专题三微专题四微专题一微专题二微专题三微专题四微专题一微专题二微专题三微专题四Unit4SpaceExploration英语晨读晚诵导语:千百年来,人类一直向往能插上翅膀,飞出地球,探索宇宙的奥秘。然而人类对宇宙的探索并不是一帆风顺的,无数探索者用自己的汗水和生命铺设了人类通往宇宙的道路。FollowingtheMoonlandings,spacetravelrapidlybecameunexceptionaltothepublic,asinnovationssucceededeachother.Bytheearly1980s,thegreatrocketspreviouslyusedintheAmericanspaceprogrammehadbeenreplacedbythespaceshuttle.WhentheChallengerspaceshuttletookoffon28January1986,theworldseemedtohavelostitswonderattheamazingachievementsoftheastronautsinvolved.Butthiswasgoingtobenoordinaryexcursion1,andmillionsofpeopletunedintowitnessthetake-offonTV.ItwasspecialbecauseChristaMcAuliffeaged37,anordinaryteacherandmother,wasabouttobecomethefirstcivilianinspace.Sheplannedtogivetwo15-minutelessonsfromorbit:thefirsttodemonstratethecontrolsofthespacecraftandexplainhowgravityworked,andthesecondtodescribetheobjectivesoftheChallengerprogramme.Christahopedtocommunicateasenseofexcitementandrekindle2interestinthespaceprogramme.Withtheeyesofstudentsacrossthenationuponher,shemighthaveinspiredanentirelynewgenerationofastronautsandspacescientists.Tragically,sheneverreturnedtoherclassroomastheshuttleexplodedjustoveraminuteaftertakingoffinFlorida,andallsevenastronautsonboardwerekilled.Theworldwentintoshock,mostpeoplehavingassumedthatthisspaceflightwouldbenomoredangerousthantravellinginanaeroplane.Howwrongtheyhadbeen!Instantaneously3,excitementandoptimismturnedintoterrorandfailure.Itwasthemostdisastrousspaceaccidentever,anditcastashadowonpeople’shearts.“Icanrememberthatdaysoclearly,watchingthetake-offo