2018届高三英语总复习第一部分回归教材unit1greatscientists课时作业新人教版

《2018届高三英语总复习第一部分回归教材unit1greatscientists课时作业新人教版》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、Unit1GreatscientistsⅠ.阅读理解(2017·河南省鹤壁市高级中学周练)EdmundHalleywasanEnglishscientistwholivedover200yearsago.Hestudiedtheobservationsofcomets(彗星)whichotherscientistshadmade.Theorbit(轨道)ofoneparticularcometwasaverydifficultmathematicalproblem.Hecouldnotfigureitout.Neithercouldothersc

2、ientistswhodealtwithsuchproblems.However,HalleyhadafriendnamedIsaacNewton,whowasabrilliantmathematician.Newtonthoughthehadalreadyworkedoutthatproblem,buthecouldnotfindthepapersonwhichhehaddoneit.HetoldHalleythattheorbitofacomethadtheshapeofanellipse(椭圆形)．NowHalleysettowork.He

3、figuredout(解决，计算出)theorbitsofsomeofthecometsthathadbeenobservedbyscientists.Hemadeasurprisingdiscovery.Thecometsthathadappearedintheyears1531,1607,and1682allhadthesameorbit.Yettheirappearancehadbeen75to76yearsapart.ThisseemedverystrangetoHalley.Threedifferentcometsfollowedthe

4、sameorbit.ThemoreHalleythoughtaboutit,themorehethoughtthattherehadnotbeenthreedifferentcometsaspeoplethought.Hedecidedthattheyhadsimplyseenthesamecometthreetimes.Thecomethadgoneawayandhadcomebackagain.Itwasanastonishingidea!Halleyfeltcertaintomakeaprediction(预言)ofwhatwouldhap

5、peninthefuture.Hedecidedthatthiswouldappearintheyear1758.Therewere53yearstogobeforeHalley'spredictioncouldbetested.In1758thecometappearedinthesky.Halleydidnotseeit,forhehaddiedsomeyearsbefore.EversincethenthatcomethadbeencalledHalley'scomet,inhishonor.1．EdmundHalleyfiguredout

6、theorbitof________.A．somedifferentcometsappearingseveraltimesB．thesamecometappearingatdifferenttimesC．threedifferentcometsappearingatthesametimeD．severalcometsappearingatthesametime2．Halleymadehisdiscovery________.A．bydoingexperimentsB．bymeansofhisowncarefulobservationC．byusi

7、ngtheworkingofotherscientistsD．bychance83．Halleymadeasurprising,butcorrectpredictionintheyear________.A．1704B．1705C．1706D．17074．Thispassageingeneralisabout________.A．HalleyandotherscientistsB．theorbitofacometC．NewtonandHalleyD．Halleyandhisdiscovery答案与解析文章介绍了哈雷和他的发现哈雷彗星，以及发现验证

8、哈雷彗星的过程。1．B　推理判断题。根据文章的第四段“Hedecidedthattheyhadsimplyseenthesamecome