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1、河北省武邑中学2018-2019学年高二英语上学期寒假作业13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。ANooneissurehowtheancientEgyptiansbuiltthepyramidsnearCairo.Butanewstudysuggeststheyusedalittlerock‘n’roll.Long-agobuilderscouldhaveattachedwoodenpolestothestone
2、sandrolledthemacrossthesand,thescientistssay.“Technically,Ithinkwhatthey’reproposingispossible,”physicistDanielBonnsaid.PeoplehavelongpuzzledoverhowtheEgyptiansmovedsuchhugerocks.Andthere’snoobviousanswer.Onaverage,eachofthetwomillionbigstonesweighedaboutasmuc
3、hasalargepickuptruck.TheEgyptianssomehowmovedthestoneblockstothepyramidsitefromaboutonekilometeraway.ThemostpopularviewisthatEgyptianworkersslidtheblocksalongsmoothpaths.Manyscientistssuspectworkersfirstwouldhaveputtheblocksonsleds(滑板).Thentheywouldhavedragged
4、themalongpaths.Tomaketheworkeasier,workersmayhavelubricatedthepathseitherwithwetclayorwiththefatfromcattle.Bonnhasnowtestedthisideabybuildingsmallsledsanddraggingheavyobjectsoversand.Evidencefromthesandsupportsthisidea.Researchersfoundsmallamountsoffat,aswella
5、salargeamountofstoneandtheremainsofpaths.However,physicistJosephWestthinkstheremighthavebeenasimplerway,wholedthenewstudy.Westsaid,“Iwasinspiredwhilewatchingatelevisionprogramshowinghowsledsmighthavehelpedwithpyramidconstruction.Ithought,‘Whydon’ttheyjusttryro
6、llingthethings?’”Asquarecouldbeturnedintoaroughsortofwheelbyattachingwoodenpolestoitssides,herealized.That,henotes,shouldmakeablockofstone“aloteasiertorollthanasquare”.Sohetriedit.Heandhisstudentstiedsomepolestoeachoffoursidesofa30-kilogramstoneblock.Thatactio
7、nturnedtheblockintosomewhatawheel.Thentheyplacedtheblockontheground.Theywrappedoneendofaropearoundtheblockandpulled.Theresearchersfoundtheycouldeasilyrolltheblockalongdifferentkindsofpaths.Theycalculatedthatrollingtheblockrequiredaboutasmuchforceasmovingitalon
8、gaslippery(滑的)path.Westhasn’ttestedhisideaonlargerblocks,buthethinksrollinghasclearadvantagesoversliding.Atleast,workerswouldn’thaveneededtocarrycattlefatorwatertosmooththepaths.28
