2021高考英语二轮复习小综合训练17含解析

小综合训练17 INCLUDEPICTURE "链答.tif" \* MERGEFORMAT 　对应学生用书P154Ⅰ.阅读理解Scientists have suggested trapping(收

小综合训练17 对应学生用书P154 Ⅰ.阅读理解 Scientistshavesuggestedtrapping(收集)carbondioxideinrocksasoneway toslowtherateofclimatechange.Buttheyhaven'tcomeupwithaneasyway todoituntilnow,anyway.ResearchersinCanadahavejustproposedanew technologytocollectandtrapthegreenhousegas. Limestone(石灰岩)andothermineralsalreadystorealotofcarbondioxide ontheearth,notesIanPower.He'sageoscientistatTrentUniversityin Peterborough,Canada.Theproblem—thisnaturalprocessisslow.Itcantake thousandsorevenmillionsofyears.Atpresent,heexplains，“We'reproducing somuchcarbondioxidenowthattheearthcan'tkeepup.” Theyfoundthatamineralcalledmagnesite(菱镁矿)locksupcarbondioxide. Atonofthismineralcanstoreabouthalfatonofcarbondioxide.Thechemical normallytakesthousandsofyearstoform.Butinthelab，Power'sgroupmadeit happeninjustafewmonths. Magnesiteoccursnaturally.Buttheprocessbywhichitformsonthe earth'ssurfaceisvery,veryslow.Soscientiststrytocombinerocksand carbondioxideusinglotsofheatinthelab.Thatcouldmakethemineral quickly—buttherearealotofproblemstodealwithtoproducemagnesitein thelabaswellasconsumingalotofcostlyenergy. Sofar,thescientistshavemadeonlyatinyamountofmagnesiteinthelab. Thetotal—onemicrogram—isaboutonemillionththeweightofapaperclip. “Sotheprocessneedsalotofimprovementbeforeitcanbegintrappingthe millionsoftonsofcarbondioxideproducedeachyear，”saysPower.“Butabig concernhasbeenovercome，”hesays.“They'veshownitispossibletodothisat roomtemperatureandpressure.Nowtheteamcanexplorehowtomaketheprocess moreefficient.” 【语篇解读】本文是一篇科普说明文。加拿大的科学家想通过实验室生产出一种菱镁