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1、Harvardresearchershavecreatedatough阅读答案 Harvardresearchershavecreatedatough,low-cost,biodegradable(可生物降解的)materialinspiredbyinsects’hardoutershells.Thematerial’sinventorssayithasanumberofpossibleusesandsomedaycouldprovideamoreenvironmentallyfriendlyal
2、ternativetoplastic.Thematerial,madefromshrimp(虾)shellsandproteinsproducedfromsilk,iscalled“shrilk.”Itisthin,clear,flexibleandstrong. Amajorbenefitfothematerialisitsbiodegradability.Plastic’stoughnessandflexibilityrepresentedarevolutioninmaterialsscien
3、ceduringthe1950sand’60s.Decadeslaterhowever,plastic’sverydurability(耐用性)israisingquestionsabouthowappropriateitisforone-timeproductssuchasplasticbags,orshort-livedconsumergoods,usedinthehomeforafewyearsandthencastintoalandfillwheretheywilldegradeforcen
4、turies.Whatisthepointofmakingsomethingthatlasts1,000years? Shrilknotonlywilldegradeinalandfill,butitsbasiccomponentsareusedasfertilizer(肥料),andsowillenrichthesoil. Shrilkhasgreatpotential,theinventorssaid.Materialsfromwhichismadeareplentifulinnature,
5、foundineverythingrangingfromshrimpshells,insectbodiestolivingplants.Thatmakesshrilklowcost,anditsmassproductionpossibleshoulditbeusedforproductsdemandingalotofmaterial. Workonshrilkiscontinuinginthelab.Theinventorssaidthematerialbecomesflexiblewhenwet
6、,sothey’reexploringwaystouseitinwetenvironments.They’realsodevelopingsimplerproductionprocesses,whichcouldbeusedfornon-medicalproducts,likeforcomputercasesandotherproductsinsidethehome.They’reevenexploringcombiningitwithothermaterials,likecarbonfibers,
7、togiveitnewproperties. 66.Paragraph1ofthepassageismainlyaboutshrilk’s____. A.remarkabledesign B.interestingname C.majorfeatures D.basicelements 67.Whathasbecomeaconcernaboutplastic? A.Usingitproperly. B.Producingitcheaply. C.Developingitspro
8、pertiesquickly. D.Evaluatingitscontributionsfairly. 68.Accordingtotheinventors,shrilkhasgreatpotentialpartlybecause____. A.itcanhelpplasticdegrade B.itcanbefoundinlivingthings C.itsmassproductionhasbeenrealized D.itsrawmaterialsar
