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28.Form the passage,we can know thatA.Paper can replace plastic completely.B.Recycling paper means saving energy.C.Paper items are cheaper than plastic ones.D.Paper doesn't favor business or the environment.29.According to the passage,which is the most environmentally friendly?A.Using paper bowl and paper cup.B.Using plastic bowl and plastic cupC.Using steel chopstics and china bowl.D.Using wooden chopstics and paper bowl.30.Which word can best describe the author's attitude to paper products?A.Positive.B.Negative.C.Doubtful.D.Uncertain.31.What's the best title of this text?A.Paper or Plastic?B.The End to Plastic.C.The Disadvantages of Paper.D.The Solution to a Greener Earth.DThe first generation of barcodes,called the Universal Product Code (UPC),were attached toproducts on sale in the early 1980s.UPC allowed retailers to manage common products with ease,butit had certain limitations-a small storage capacity (up to 20 Japanese characters only),size limit(the more the characters,the longer the barcode )and weak(barcodes stop working when dirly ordamaged).In 1987,David Allais,an American,developed the first two-dimensional(2D)barcode.However,the updated version still failed to solve all the limitations.Before 1994,Toyota used barcodes totrack automobile parts on the assembly()line.These barcodes did not satisfy Toyota managers.To find a better solution,the automaker then reached out to its sister company,Denso Wave to fix theproblems.Masahiro Hara,an engineer from Denso Wave,developed the QR code technology to maketracking automobile parts on the assembly line faster and more error-free.It took Masahiro Hara andhis team two years to develop the QR code.Initially,the team decided to use different color lumps tostore specific information.In this way,a simple QR code can store 250 times more information thana one-dimensional (ID)barcode can.More importantly,with its smaller size,it can be used anywhereregardless of the space limit.In order to cut down the costs,based on the initial colored QR codes,the team further developed a black-and-white version of QR code,which we commonly see today.It慕华·优策2021一2022学年高三年级第一次联考英语试卷第7页‘共12页