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ID:38792086
大小:192.50 KB
页数:27页
时间:2019-06-19
《英语六级新题型练习之长篇阅读:段落匹配题(5套)》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、@厦小嘉整理2013年12月英语六级改革新题型长篇阅读练习(一) 英语六级新题型练习之长篇阅读:段落匹配题。 Paper--MorethanMeetstheEye A) Wearesurroundedbysomuchpaperandcardthatitiseasytoforgetjusthowcomplexitis.Therearemanyvarietiesandgradesofpapermaterials, andwhilstitisfairlyeasytospotthevariet
2、ies, itisfarmoredifficulttospotthegrades. B) Itneedstobeunderstoodthatmostpaperandcardismanufacturedforaspecificpurpose, sothatwhilstthecorn-flakepacketmaylooksmart, itisclearlynotsomethingdestinedforthearchives.Itismadetolookgood, butonlyneedsalimi
3、tedlifespan.Itisalsomuchcheapertomanufacturethanhighgradecard. C) Papercanbemadefromanalmostendlessvarietyofcellulose-basedmaterialwhichwillincludemanywoods, cottonsandgrassesorwhichpapyrusisanexampleandfromwherewegettheword"paper".Manyoftheseareverys
4、pecialized, butthepreponderanceofpapermakinghasbeenfromsoftwoodandcottonorrags, withthebulkbeingwood-based. PaperfromWood D) Inordertomakewoodintopaperitneedstobebrokendownintofinestrands.Firstlybypowerfulmachineryandthenboiledwithstrongalkaliessuch
5、ascausticsoda, untilafinepulpofcellulosefibersisproduced.Itisfromthispulpthatthefinalproductismade, relyingonthebondingtogetherofthecelluloseintolayers.That, inaverysmallnutshell, istheessenceofpapermakingfromwood.However, therealityisrathermorecompli
6、cated.Inorder@厦小嘉整理togiveusourwhitepaperandcard, themakerswilladdbleachandothermaterialssuchaschinaclayandadditionalchemicals. E) Afurtherproblemwithwoodisthatitcontainsamaterialthatisnotcellulose.Somethingcalledlignin.Thisisessentialforthetreesincei
7、tholdsthecellulosefibrestogether, butifitisincorporatedintothemanufacturedpaperitpresentsarchivistswithaproblem.Lignineventuallybreaksdownandreleasesacidproductsintothepaper.Thiswillweakenthebondbetweenthecellulosefibersandthepaperwillbecomebrittleand
8、lookratherbrownandcareworn.Wehaveallseenthisinoldnewspapersandcheappaperbackbooks.Ithasbeenestimatedthatmostpaperbackbookswillhavealifeofnotgreaterthanfiftyyears.Notwhatweneedforourarchives. F) Sincethelignincanberemovedfromthepaperpulpduring
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