Harvardresearchershavecreateda-查字典问答网

来自刘锡明的问题

　　Harvardresearchershavecreatedatoughlow-costbiodegradable(可生物降解的)materialinspiredbyinsects’hardoutershells.Thematerial’sinventorssayithasanumberofpossibleusesandsomedaycouldprovideamoreenvironmentallyfriendlyalternative(替代物)toplastic.Thematerialmadefromshrimp(虾)shellsandproteinsproducedfromsilkiscalled“shrilk”.Itisthinclearflexibleandstrong.

　　Amajorbenefitofthematerialisitsbiodegradability.Plastic’stoughnessandflexibilityrepresentedarevolutioninmaterialsscienceduringthe1950sand1960s.Decadeslaterhoweverplastic’sverydurability(耐用性)israisingquestionsabouthowappropriateitisforone-timeproductssuchasplasticbagsorshort-livedconsumergoodsusedinthehomeforafewyearsandthencastintoalandfill（垃圾池）wheretheywilldegradeforcenturies.Whatisthepointofmakingsomethingthatlasts1000years?

　　Shrilkhasgreatpotentialtheinventorssaid.Materialsfromwhichitismadeareplentifulinnaturefondineverythingrangingfromshrimpshellsinsectbodiestolivingplantsthatmakesshrilklowcostanditsmassproductionpossibleshoulditbeusedforproductsdemandingalotofmaterial.

　　Workonshrilkiscontinuinginthelab.Theinventorssaidthematerialbecomesflexiblewhenwetsothey’reexploringwaystouseitinwetenvironments.They’realsodevelopingsimplerproductionprocesseswhichcouldbeusedfornon-medicalproductslikeforcomputercasesandotherproductsinsidethehome.They’reevenexploringcombiningitwithothermaterialslikecarbonfiberstogiveitnewproperties.

　　1.Paragraph1ofthepassageismainlyaboutshrilk’s______________.

　　A.remarkabledesign

　　B.interestingname

　　C.majorfeatures

　　D.basicelements

　　2.Whathasbecomeaconcernaboutplastic?

　　A.Usingitproperly

　　B.Producingitcheaply

　　C.Developingitspropertiesquickly

　　D.Evaluatingitscontributionsfairly

　　3.Accordingtotheinventorsshrilkhasgreatpotentialpartlybecause_________.

　　A.itcanhelpplasticdegrade