英语六级新题型练习之长篇阅读段落匹配题5套Word文档下载推荐.docx
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Papercanbemadefromanalmostendlessvarietyofcellulose-basedmaterialwhichwillincludemanywoods，
cottonsandgrassesorwhichpapyrusisanexampleandfromwherewegettheword"
paper"
.Manyoftheseareveryspecialized，
butthepreponderanceofpapermakinghasbeenfromsoftwoodandcottonorrags，
withthebulkbeingwood-based.
PaperfromWood
D）
Inordertomakewoodintopaperitneedstobebrokendownintofinestrands.Firstlybypowerfulmachineryandthenboiledwithstrongalkaliessuchascausticsoda，
untilafinepulpofcellulosefibersisproduced.Itisfromthispulpthatthefinalproductismade，
relyingonthebondingtogetherofthecelluloseintolayers.That，
inaverysmallnutshell，
istheessenceofpapermakingfromwood.However，
therealityisrathermorecomplicated.Inordertogiveusourwhitepaperandcard，
themakerswilladdbleachandothermaterialssuchaschinaclayandadditionalchemicals.
E）
Afurtherproblemwithwoodisthatitcontainsamaterialthatisnotcellulose.Somethingcalledlignin.Thisisessentialforthetreesinceitholdsthecellulosefibrestogether，
butifitisincorporatedintothemanufacturedpaperitpresentsarchivistswithaproblem.Lignineventuallybreaksdownandreleasesacidproductsintothepaper.Thiswillweakenthebondbetweenthecellulosefibersandthepaperwillbecomebrittleandlookratherbrownandcareworn.Wehaveallseenthisinoldnewspapersandcheappaperbackbooks.Ithasbeenestimatedthatmostpaperbackbookswillhavealifeofnotgreaterthanfiftyyears.Notwhatweneedforourarchives.
F）
Sincethelignincanberemovedfromthepaperpulpduringmanufacture，
theobviousquestionis"
whyisitleftinthepaper?
"
Theanswerliesinthefactthatligninmakesupaconsiderablepartofthetree.Byleavingthelignininthepulpapapermakercanincreasehispaperyieldfromatreetosome95%.Removingitmeansayieldofonly35%.Itisclearlyuneconomictoremovetheligninformanypaperandcardapplications.
G）
Italsomeans，
ofcourse，
thatlignin-freepaperisgoingtobemoreexpensive，
butthatisneverthelesswhatthearchivistmustlookforinhissupplies.Thereisnopointwhatsoeverincarefullyplacingourvaluableartifactsinpaperorcardthatisgoingtohastentheirdemise.Acidisparticularlyharmfultophotographicmaterials，
causingthemtofadeandissomecasessimplyvanish！
H）
So，
howdowetellapieceofsuitablepaperorcardfromonethatisunsuitable?
Youcannotdoitbysimplylooking，
andratherdisappointingly，
youcannotalwaysrelyonthelabel."
Acid-free"
mightbetrueinasmuchasatestonthepapermayindicatethatitisaneutralmaterialatthistime.Butlignincantakeyearsbeforeitstartstheinevitableprocessofbreakingdown，
andintherightconditionsitwillspeedupenormously.
I）
Addedtothis，
asIhaveindicatedearlier，
papermayalsocontainothermaterialsaddedduringmanufacturesuchasbleach，
chinaclay，
chemicalwhitenersandsize.Thislookslikeableakpicture，
anditwouldbebutforthefactthattherearesupplierswhowillguaranteethematerialthattheysell.Ifyouwanttobeabsolutelysurethatyouarestoringin，
orprintingon，
thecorrectmaterialthenthisisprobablytheonlyway.
J）
Incidentally，
acidscanmigratefrommaterialtomaterial.Liningoldshoeboxeswithgoodqualityacid-freepaperwilldolittletoguardthecontents.Theacidwillgetthereintheend.
PaperfromRag
K）
Paperisalsocommonlymadefromcottonandragwaste.Thishastheadvantageofbeinglignin-free，
butbecausethereismuchlesscottonandragthantrees，
italsotendstobemuchmoreexpensivethanwoodpulppaper.Youwillstillneedtopurchasefromareliablesourcethough，
sinceevenragpaperandcardcancontainundesirableadditives.
L）
Areliablesourceforqualityragpapersisarecognizedartstockiest.Manywatercolorartistsinsistonusingonlyfinequalityragpaperandboard.
M）
Themainlessontolearnfromthisinformationisthatyoucannotrelyonpurchasingarchivalmaterialsfromthehighstreet.Theonlysafesolutionistopurchasefromspecialistsuppliers.Itmaycostrathermore，
butintheendyouwillknowthatyourimportantandvaluabledataandimageshavethebesthomepossible.
1.Thecorn-flakepacketischeaperthanhighgradecard.
2.Therearealotofmaterialswhichcanbeusedformakingpaper，
butthesuperiorityonesaresoftwood，
cottonandrags.
3.Duringthewholemanufacturingprocess，
thefinalproductismadefromapulpofcellulosefibres.
4.Inordertomakewhitepaperandcard，
themakerswilladdbleach.
5.Liguinisessentialforthetreebutitwillmakepapereasytobreak.
6.Manypaperproducerswillpreserveligninduringmanufacture，
becauseleavingtheligninwillmakemorepaperfromatree.
7.Acidisparticularlyharmfultophotographicmaterials.
8.Iftheligninisremovedfromthepaper，
thepaperwillbemoreexpensive.
9.Althoughfreeoflignin，
papermadefromcottonandragwastecanalsocostmoremoneythanwoodpulppaperbecausethereismuchlesscottonandragthantrees.
10.Whatwecanlearnfrom"
PaperfromRag"
isthatyouhadbetterbuyarchivalmaterialsfromspecialistsuppliers.
文章精要
本文主要介绍了我们平常所见所用的纸的复杂性，通过介绍用木头和破布料造纸的过程，使我们对纸的类别、属性有了更深入的了解。
1.B
根据题干中的信息提示词corn—flakepacket，highgradecard，可定位到文章第二段，该部分最后提到corn-flakepacket在制造过程中比高等级的纸（highgradecard）便宜.
2.C
根据题干中的信息提示词softwood，cottonandrags，可定位到文章第三段最后一句。
3.D
根据题干中的信息提示词finalproduct，可将答案定位到D段，第二、三句提到最后的产品来源于纤维素纸浆。
4.D
根据题干中的信息提示词whitepaperandcard，可将答案定位到D段，该部分最后提到为了得到白纸，纸张生产者在制造过程中添加了漂白粉和其他化学物质。
5.E
根据题干中的信息提示词essentialforthetree，可将答案定位到E段，该部分提到木质素是木头的主要组成物，其作用是凝聚纤维素，但它会使纸张变得易碎。
6.F
根据题干中的信息提示词lignin，可将答案定位到F段，该部分最后提到许多纸张生产者在生产过程中会保留木质素，主要是因为它会增加树木的造纸产量。
7.G
根据题干中的信息提示词acid，可将答案定位到G段，该部分最后提到酸对相纸的原料尤其不利。
8.F
根据题干中的信息提示词lignin和paper可定位到文章的F段，因为该段提到，如果在纸张的生产中去除木质素，将会降低树木出产纸张的量，由此可以知道，去除了木质素的纸张价格必定会更加昂贵。
9.K
根据题干中的信息提示词cottonandragwaste可定位到文章的K段，该部分告诉我们，尽管用棉花和破布料造的纸里没有木质素，但它们要比木制的纸贵很多，这是因为棉花和破布料的数量比树木少得多，由此可以得出答案。
10.M
根据题干中的信息提示词PaperfromRa9可定位到文章的最后一段，该部分提出最好到专业的供应商那里去买档案材料，由此可以得出答案。
2013年12月英语六级改革新题型长篇阅读练习
（二）
HowtoMakeAttractiveandEffectivePowerPointPresentations
MicrosoftPowerPointhasdramaticallychangedthewayinwhichacademicandbusinesspresentationsaremade．
ThisarticleoutlinesfewtipsonmakingmoreeffectiveandattractivePowerPointpresentations．
TheText
Keepthewordingclearandsimple．
Useactive，
visuallanguage．
Cutunnecessarywords—agoodruleofthumbistocutparagraphsdowntosentences，
sentencesintophrases，
andphrasesintokeywords．Limitthenumberofwordsandlinesperslide．
TrytheRuleofFive－fivewordsperline，
fivelinesperslide．
Iftoomuchtextappearsononeslide，
usetheAutoFitfeaturetosplititbetweentwoslides．
ClickwithintheplaceholdertodisplaytheAutoFitOptionsbutton
（itssymbolistwohorizontallineswitharrowsaboveandbelow），
thenclickonthebuttonandchooseSplitTextbetweenTwoSlidesfromthesubmenu．
Fontsizefortitlesshouldbeatleast36to40，
whilethetextbodyshouldnotbesmallerthan24．Useonlytwofontstylesperslide—oneforthetitleandtheotherforthetext．
Choosetwofontsthatvisuallycontrastwitheachother．
GaramondMediumCondensedandImpactaregoodfortitles，
whileGaramondorTempusSanscanbeusedforthetextbody．
Embedthefontsinyourpresentation，
ifyouarenotsurewhetherthefontsusedinthepresentationarepresentinthecomputerthatwillbeusedforthepresentation．
Toembedthefonts：
（1）
OntheFilemenu，
clickSaveAs．
（2）
Onthetoolbar，
clickTools，
clickSaveOptions，
selecttheEmbedTrueTypeFontscheckbox，
andthenselectEmbedcharactersinuseonly．
Usecolorssparingly；
twotothreeatmost．
Youmayuseonecolorforallthetitlesandanotherforthetextbody．
Beconsistentfromslidetoslide．
Chooseafontcolorthatcontrastswellwiththebackground．
Capitalizingthefirstletterofeachwordisgoodforthetitleofslidesandsuggestsamoreformalsituationthanhavingjustthefirstletterofthefirstwordcapitalized．
Inbulletpointlines，
capitalizethefirstwordandnootherwordsunlesstheynormallyappearcapped．
Upperandlowercaseletteringismorereadablethanallcapitalletters．
Moreover，
currentstylesindicatethatusingallcapitallettersmeansyouareshouting．
Ifyouhavetextthatisinthewrongcase，
selectthetext，
andthenclickShift＋F3untilitchangestothecasestylethatyoulike．
ClickingShift＋F3togglesthetextcasebetweenALLCAPS，
lowercase，
andInitialCapitalstyles．
Useboldoritalictypefaceforemphasis．
Avoidunderlining，
itcluttersupthepresentation．Don’tcenterbulletedlistsortext．
I
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