人教版高中英语必修五单元测试题及答案全套b

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1、人教版高中英语必修五单元测试题及答案全套B第一单元检测（B）（时间:120分钟满分:150分）第一部分听力（共两节，满分30分）第二部分阅读理解（共两节，满分40分）第一节（共12小题;每小题2.5分，满分30分）阅读下面短文，从每题所给的A、B、C和D四个选项中，选出最佳选项。AMoveEarth——ifsnosciencefictionScientistshavefoundanunusualwaytopreventourplanetfromoverheating:moveittoacoolersp

2、ot.AllyouhavetodoissendafewcometsinthedirectionofEarth,anditsorbitwillbechanged.Ourworldwillthenbesentintoasafer,colderpartofthesolarsystem.ThisideaforimprovingourclimatecomesfromagroupofUSNationalAeronauticsandSpaceAdministration（NASA）engineersandAmeri

3、canastronomers.Theysaytheirplancouldaddanothersixbillionyearstotheusefullifetimeofourplanet—ffectivelydoublingitsworkinglife.TheplanputforwardbyDr.Laughlin,andhiscolleaguesDonKorycanskyandFredAdams,needscarefullydirectingacometorasteroid（小行星）sothatitpas

4、sesclosebyourplanetandsendssomeofitsgravitationalenergytoEarth・"Earth，sorbitalspeedwouldincreaseasaresultandwewouldmovetoahigherorbitawayfromtheSun/^Laughlinsaid・EngineerswouldthendirecttheircometsothatitpassedclosetoJupiterorSatum.Thecometwouldpickupen

5、ergyfromoneofthesegiantplanets.LateritsorbitwouldbringitbacktoEarth,andtheprocesswouldberepeated・Intheshortterm,theplanprovidesanidealwaytoglobalwarming,althoughtheteamwasactuallyconcernedwithamuchgreaterdange匚TheSuniscertaintoheatupinaboutabillionyears

6、andso"seriouslycompromise"ourbiosphere（生物圈）一bycookingus.Tha「swhythegroupdecidedtotrytosaveEarlh.Theplanhasoneortwoworryingaspects,though.Forastart,spaceengineerswouldhavetobeverycarefulabouthowtheydirectedtheirasteroidorcomettowardsEarth.Thesmallestmisc

7、alculationinorbitcouldfireitstraightatEarth一withdeadlyconsequences.ThereisalsothequestionoftheMoon.AsthecurrentissueofscientificAmericanmagazinepointsoutjfEarthwaspushedoutofitscurrentposition^tismostlikelythattheMoonwouldbestrippedawayfromEarth.Thiswou

8、ldgreatlychangeourplanet"sclimate.I21WhatmakesthescientistsplantomoveEarth?A.AfewcometsaremovingtothedirectionofEarth・B.Earth'sworkinglifeiscomingtoanendsoon.C.Earthwillbecometoohotformankindtokeepalive.D.Themoonismovingfartheran