2019版高考英语一轮复习unit1greatscientists夯基提能作业新人教版必修5

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1、Unit1GreatscientistsI・阅读理解（2017河南鹤樂高级屮学9月周练）EdmundHalleywasanEnglishscientistwholivedover200yearsago.Hestudiedtheobservationsofcomets（彗星）whichotherscientistshadmade.Theorbit（轨道）ofoneparticularcometwasaverydifficultmathematicalproblem・Hecouldnotfigureitout.Neithercouldothersci

2、entistswhodealtwithsuchproblems・However,HalleyhadafriendnamedIsaacNcwton,whowasabrilliantmathematician・Newtonthoughthehadalreadyworkedoutthatproblem,buthecouldnotfindthepapersonwhichhehaddoneit.HetoldHalleythattheorbitofacomethadtheshapeofanellipse（椭圆形）.ThenHalleysetouttowork

3、.Hefiguredout（计算出）theorbitsofsomeofthecometsthathadbeenobservedbyotherscientists.Hemadeasurprisingdiscovery.Thecometsthathadappearedintheyears1531,1607,and1682allhadthesameorbit.Yettheirappearancehadbeen75to76yearsapart.Ttseemedverystrangethatthreedifferentcometsfollowedthesa

4、meorbit.ThemoreHal1eythoughtaboutit,themorehethoughtthattherehadnotbeenthreedifferentcometsaspeoplethought・Hebelievedthattheyhadsimplyseenthesamecometthreetimes・Thecomethadgoneawayandhadcomebackagain.Itwasanastonishingidea!Halleyfeltcertaintomakeaprediction（预言）ofwhatwouldhapp

5、eninthefuture.Hepredictedthatthiscometwouldappearintheyear1758.Therewouldbe53yearstogobeforeHalleyspredictioncouldbetested・In1758thecometappearedinthesky.Halleydidnotseeit,forhehaddiedsomeyearsbefore・EversincethenthatcomethadbeencalledHalley"sCometinhishonor.1.EdmundHalleydis

6、covered•A.somedifferentcometsappearingseveraltimesB.thesamecometappearingindifferentorbitsC・threedifferentcometsappearinginthesameorbitD.severalcometsappearingatthesametime2.Halleymadehisdiscovery.A.bydoingexperimentsB.bymeansofhisowncarefulobservationC・byusingtheobservations

7、ofotherscientistsD.bychanee1.Halleymadeasurprisingbutcorrectpredictionintheyear.A.1704B.1705C.1706D.17072.Thispassageingeneralisabout.A.HalleyandotherscientistsB・theorbitofacometC.NewtonandHalleyD.HalleyandhisdiscoveryII.七选五（2018安徽合肥高三调研）HowtoSetGoalsWhetheryouhavesmalldreams

8、orhighexpectations,settinggoalsallowsyoutoplanhowyouwanttomovethroug