正在进行安全检测...
学位英语阅读理解专项提升练习合集一、阅读理解PassageoneThefutureofspaceexplorationmaydependonanartformfromthepast:origami(折纸艺术,theancientartofpaperfolding.ResearchersfromWashingtonStateUniversity(WSU,US,haveusedorigamitopossiblysolvetheproblemofstoringandmovingfueltorocketengines,akeychallengeinspacetravel,accordingtoNewswise.They’vedevelopedafoldableplasticfuel“bladder(囊状物”resistanttosupercoldtemperatures,whichcouldbeusedtostoreandpumpfuelinspacecraftsofthefuture.TheirfindingshaverecentlybeenpublishedinthejournalCryogenics.“Folkshavebeentryingtomakebagsforrocketfuelforalongtime,”saidJakeLeachman,oneoftheleadresearchers.“Wecurrentlydon’tdolarge,long-durationtripsbecausewecan’tstorefuellongenoughinspace.”Meanwhile,NASAisalsolookingtopaperfoldingtohelpobservedistantplanets.TheagencyiscurrentlydevelopingStarshade,afoldable,sunflower-shapedpieceofhardwarethatwouldhelpblockstarlightandenabletelescopestoviewdistantobjectsmoreclearlyinspace.“Ahugepartofmyjobislookingatsomethingonpaperandasking,‘Canweflythis?’”MananArya,atechnologistinCalifornia,said.“OnceIrealizedthisishowyoufoldspacecraftstructures,Ibecameinterestedinorigami.IrealizedIwasgoodatitandenjoyedit.Now,Ifoldconstantly.”1
Usingorigamiforspacepurposesisn’tnew,however.Solararrays(太阳能阵列,experimentalwingsforspaceshuttleprogramsandaninflatable(可充气的satellitewerealsoinspiredbyorigamiinbothpastandpresentspaceprojects.“Withmostorigami,themagiccomesfromthefolding,”RobertSalazar,whohelpeddesigntheStarshadeandnowworksontheTransformersproject,saidinastatement.“Therearesomanypatternstostillbeexplored.”1.Howcouldthe“bladder”helpinfuturemissions?A．Toprotectspacecraftsfromextremeweather.B．Tobeusedtostoreandsupplyfuelinspacecrafts.C．Tohelprocketenginescutenergyconsumption.D．Tobeusedtoimproveenergyefficiency.答案：B2.WhatcanweknowaboutNASA’sStarshade?A．Itcanbeusedtogettelescopesclosertostars.B．Itcanenlargetheviewoftelescopesinspace.C．Itcanabsorbastar’slightbeforeitenterstelescopes.2
《正在进行安全检测....doc》
将本文的Word文档下载，方便收藏和打印
