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1、xx-2019学年高二英语上学期寒假作业(VII)第一节（共10小题；每小题2分，共20分）阅读下面短文,从每题所给的四个选项（A、B、C和D）中,选出最佳选项,并在答题卡上将该项涂黑。NooneissurehowtheancientEgyptiansbuiltthepyramidsnearCairo.Butanewstudysuggeststheyusedalittlerock‘n’roll.Long-agobuilderscouldhaveattachedwoodenpolestothestonesandrolledthemacrossthesand,thescientistss
2、ay.“Technically,Ithinkwhatthey’reproposingispossible,”physicistDanielBonnsaid.PeoplehavelongpuzzledoverhowtheEgyptiansmovedsuchhugerocks.Andthere’snoobviousanswer.Onaverage,eachofthetwomillionbigstonesweighedaboutasmuchasalargepickuptruck.TheEgyptianssomehowmovedthestoneblockstothepyramidsitefr
3、omaboutonekilometeraway.ThemostpopularviewisthatEgyptianworkersslidtheblocksalongsmoothpaths.Manyscientistssuspectworkersfirstwouldhaveputtheblocksonsleds(滑板).Thentheywouldhavedraggedthemalongpaths.Tomaketheworkeasier,workersmayhavelubricatedthepathseitherwithwetclayorwiththefatfromcattle.Bonnh
4、asnowtestedthisideabybuildingsmallsledsanddraggingheavyobjectsoversand.Evidencefromthesandsupportsthisidea.Researchersfoundsmallamountsoffat,aswellasalargeamountofstoneandtheremainsofpaths.However,physicistJosephWestthinkstheremighthavebeenasimplerway,wholedthenewstudy.Westsaid,“Iwasinspiredwhi
5、lewatchingatelevisionprogramshowinghowsledsmighthavehelpedwithpyramidconstruction.Ithought,‘Whydon’ttheyjusttryrollingthethings?’”Asquarecouldbeturnedintoaroughsortofwheelbyattachingwoodenpolestoitssides,herealized.That,henotes,shouldmakeablockofstone“aloteasiertorollthanasquare”.Sohetriedit.He
6、andhisstudentstiedsomepolestoeachoffoursidesofa30-kilogramstoneblock.Thatactionturnedtheblockintosomewhatawheel.Thentheyplacedtheblockontheground.Theywrappedoneendofaropearoundtheblockandpulled.Theresearchersfoundtheycouldeasilyrolltheblockalongdifferentkindsofpaths.Theycalculatedthatrollingthe
7、blockrequiredaboutasmuchforceasmovingitalongaslippery(滑的)path.Westhasn’ttestedhisideaonlargerblocks,buthethinksrollinghasclearadvantagesoversliding.Atleast,workerswouldn’thaveneededtocarrycattlefatorwatertosmooththepaths.28.It’swi
