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uce coundertanding omweoducedidntmetstandards The crvonare now produced inKimhome couy f SoprnOyasai Crayons meet thes which is an inspeetion that ensures the criterion forThey have aned the European standard toyeof str ypectionhsalsecnumerous design awards for the product.hilengedr the company suggests that aregivers seek medicalQgeehtdeatshe6rayoaa"Wcheceean2ugehtfar9goCsmceandemkethe crayons,but they are not food"the company said."if.Wik)thembi y heic instituion.28.What is a unique feature of Oyasai Crayons?A.They are free of pigments.B.They come in light colors.C.They are produced in a complex way.D.They are made from food-grade materials.29.What inspired Kimura's Oyasai Crayons?A.Designing.B.Cooking.C.Harvesting.D.Recycling.30.What attitude does the compay suggestradopt towards their product?A.Cautious.B.Tolerant.C.Hopeful.D.Critical..最31.What is the best title for the text?A.New kid-friendly crayonsB.Plant-based eatable crayonsC.Crayons:from waste to treasureD.Kimura:from designer to inventorDcoda wolPlastic is nearly everywhere-in shoes,clothes,refrigerators and constructionmaterials.But this highly useful material can have a major defect.Made from oil andslow to break down,conventional plastic is not environmentally friendly.Today,researchers discuss inventing what they say should be a safer,biodegradable(可生物降alternative made from fish waste-heads,bones,and skin-that would otherwiselikely be thrown out.If developed successfully,fish-oil-based plastic could help meet the considerableneed for more sustainable plastic,says Francesca Kerton,the project's investigator.Previously,others have developed new plastic using plant-based oils.However,this toocomes with a disadvantage:The crops that produce these oils require land that couldotherwise be used to grow food.Leftover fish struck Kerton as a promising alternative.Salmon (farming is amajor industry for coastal Newfoundland,where her university is located.After the fishare processed,leftover parts are often thrown away.Kerton and her colleagues developeda process for turning this fish oil into a plastic-like material.But does the plastic smellfishy?"When we start the process with the fish oil,there is a slight kind of fish smell,but as we go through the steps,that smell disappears,"Kerton says.In other experiments,they have begun examining how quickly the new materialwould likely break down once its useful life is over.Kerton put pieces of it in water,andto speed up the degradation for some pieces,she added a chemical capable of breakingdown fats like those in the fish oil.Under a microscope,she later saw microbialgrowth on all of the samples,even those that had been in plain water,an(广西国品文化一桂柳金卷)英语第五页(共8页)