六級段落匹配題空練習題

1、六級段落匹配題空練習題段落匹配題是大學英語四級考試全面改革后出現(xiàn)的一種新題型，由于解題時間較緊、題目考查的范圍和內容較復雜，成為考生失分較多的一題。為了幫助大家提高段落匹配題的解題技巧，下面是我為大家?guī)碛⒄Z六級段落匹配練習題，歡迎大家參考練習！六級段落匹配練習題：Paper-MorethanMeetstheEyeAWearesurroundedbysomuchpaperandcardthatitiseasytoforgetjusthowcomplexitis.Therearemanyvarietiesandgradesofpapermaterials,andwhilstitisfairlye

2、asytospotthevarieties,itisfarmoredifficulttospotthegrades.BItneedstobeunderstoodthatmostpaperandcardismanufacturedforaspecificpurpose,sothatwhilstthecorn-flakepacketmaylooksmart,itisclearlynotsomethingdestinedforthearchives.Itismadetolookgood,butonlyneedsalimitedlifespan.Itisalsomuchcheapertomanufac

3、turethanhighgradecard.CPapercanbemadefromanalmostendlessvarietyofcellulose-basedmaterialwhichwillincludemanywoods,cottonsandgrassesorwhichpapyrusisanexampleandfromwherewegetthewordpaper.Manyoftheseareveryspecialized,butthepreponderanceofpapermakinghasbeenfromsoftwoodandcottonorrags,withthebulkbeingw

4、ood-based.PaperfromWoodDInordertomakewoodintopaperitneedstobebrokendownintofinestrands.Firstlybypowerfulmachineryandthenboiledwithstrongalkaliessuchascausticsoda,untilafinepulpofcellulosefibersisproduced.Itisfromthispulpthatthefinalproductismade,relyingonthebondingtogetherofthecelluloseintolayers.Th

5、at,inaverysmallnutshell,istheessenceofpapermakingfromwood.However,therealityisrathermorecomplicated.Inordertogiveusourwhitepaperandcard,themakerswilladdbleachandothermaterialssuchaschinaclayandadditionalchemicals.EAfurtherproblemwithwoodisthatitcontainsamaterialthatisnotcellulose.Somethingcalledlign

6、in.Thisisessentialforthetreesinceitholdsthecellulosefibrestogether,butifitisincorporatedintothemanufacturedpaperitpresentsarchivistswithaproblem.Lignineventuallybreaksdownandreleasesacidproductsintothepaper.Thiswillweakenthebondbetweenthecellulosefibersandthepaperwillbecomebrittleandlookratherbrowna

7、ndcareworn.Wehaveallseenthisinoldnewspapersandcheappaperbackbooks.Ithasbeenestimatedthatmostpaperbackbookswillhavealifeofnotgreaterthanfiftyyears.Notwhatweneedforourarchives.FSincethelignincanberemovedfromthepaperpulpduringmanufacture,theobviousquestioniswhyisitleftinthepaper?Theanswerliesinthefactt

8、hatligninmakesupaconsiderablepartofthetree.Byleavingthelignininthepulpapapermakercanincreasehispaperyieldfromatreetosome95%.Removingitmeansayieldofonly35%.Itisclearlyuneconomictoremovetheligninformanypaperandcardapplications.GItalsomeans,ofcourse,thatlignin-freepaperisgoingtobemoreexpensive,butthati

9、sneverthelesswhatthearchivistmustlookforinhissupplies.Thereisnopointwhatsoeverincarefullyplacingourvaluableartifactsinpaperorcardthatisgoingtohastentheirdemise.Acidisparticularlyharmfultophotographicmaterials,causingthemtofadeandissomecasessimplyvanish!HSo,howdowetellapieceofsuitablepaperorcardfromo

10、nethatisunsuitable?Youcannotdoitbysimplyooking,andratherdisappointingly,youcannotalwaysrelyonthelabel.Acid-free“mightbetrueinasmuchasatestonthepapermayindicatethatitisaneutralmaterialatthistime.Butlignincantakeyearsbeforeitstartstheinevitableprocessofbreakingdown,andintherightconditionsitwillspeedup

11、enormously.IAddedtothis,asIhaveindicatedearlier,papermayalsocontainothermaterialsaddedduringmanufacturesuchasbleach,chinaclay,chemicalwhitenersandsize.Thislookslikeableakpicture,anditwouldbebutforthefactthattherearesupplierswhowillguaranteethematerialthattheysell.Ifyouwanttobeabsolutelysurethatyouar

12、estoringin,orprintingon,thecorrectmaterialthenthisisprobablytheonlyway.JIncidentally,acidscanmigratefrommaterialtomaterial.Liningoldshoeboxeswithgoodqualityacid-freepaperwilldolittletoguardthecontents.Theacidwillgetthereintheend.PaperfromRagKPaperisalsocommonlymadefromcottonandragwaste.Thishastheadv

13、antageofbeinglignin-free,butbecausethereismuchlesscottonandragthantrees,italsotendstobemuchmoreexpensivethanwoodpulppaper.Youwillstillneedtopurchasefromareliablesourcethough,sinceevenragpaperandcardcancontainundesirableadditives.LAreliablesourceforqualityragpapersisarecognizedartstockiest.Manywaterc

14、olorartistsinsistonusingonlyfinequalityragpaperandboard.MThemainlessontolearnfromthisinformationisthatyoucannotrelyonpurchasingarchivalmaterialsfromthehighstreet.Theonlysafesolutionistopurchasefromspecialistsuppliers.Itmaycostrathermore,butintheendyouwillknowthatyourimportantandvaluabledataandimages

15、havethebesthomepossible.段落匹配練習題選項：Thecorn-flakepacketischeaperthanhighgradecard.Therearealotofmaterialswhichcanbeusedformakingpaper,butthesuperiorityonesaresoftwood,cottonandrags.Duringthewholemanufacturingprocess,thefinalproductismadefromapulpofcellulosefibres.Inordertomakewhitepaperandcard,themake

16、rswilladdbleach.Liguinisessentialforthetreebutitwillmakepapereasytobreak.Manypaperproducerswillpreserveligninduringmanufacture,becauseleavingtheligninwillmakemorepaperfromatree.Acidisparticularlyharmfultophotographicmaterials.Iftheligninisremovedfromthepaper,thepaperwillbemoreexpensive.Althoughfreeo

17、flignin,papermadefromcottonandragwastecanalsocostmoremoneythanwoodpulppaperbecausethereismuchlesscottonandragthantrees.WhatwecanlearnfromPaperfromRagisthatyouhadbetterbuyarchivalmaterialsfromspecialistsuppliers.段落匹配練習題答案：本文主要介紹了我們平常所見所用的紙的復雜性，通過介紹用木頭和破布料造紙的過程，使我們對紙的類別、屬性有了更深入的了解。1.B根據(jù)題干中的信息提示詞cornfl

18、akepacket,highgradecard,可定位到文章第二段，該部分最后提到corn-flakepacket在制造過程中比高等級的紙highgradecard便宜.C根據(jù)題干中的信息提示詞softwood，cottonandrags，可定位到文章第三段最后一句。.D根據(jù)題干中的信息提示詞finalproduct，可將答案定位到D段，第二、三句提到最后的產(chǎn)品來源于纖維素紙漿。.D根據(jù)題干中的信息提示詞whitepaperandcard可將答案定位到D段，該部分最后提到為了得到白紙，紙張生產(chǎn)者在制造過程中添加了漂白粉和其他化學物質。.E根據(jù)題干中的信息提示詞essentialforthetree，可將答案定位到E段，該部分提到木質素是木頭的主要組成物，其作用是凝聚纖維素，但它會使紙張變得易碎。.F根據(jù)題干中的信息提示詞lignin，可將答案定位到F段，該部分最后提到許多紙張生產(chǎn)者在生產(chǎn)過程中會保留木質素，主要是因為它會增加樹木的造紙產(chǎn)量。.G根據(jù)題干中的信息提示詞acid，可將答案定位到G段，該部