公共英語三級閱讀練習(xí)題十一

2019年公共英語三級閱讀練習(xí)題十一2019年公共英語三級閱讀練習(xí)題十一Flyingoveradesertareainanairplane,twoscientistslookeddownwithtrainedeyesattreesandbushes.Afteranhour’sflight,oneofthescientistswroteinhisbook,Lookhereforprobablemetal.Scientistsinanotherairplane,flyingoveramountainarea,sentamessagetootherscientistsontheground,Goldpossible.Walkingacrosshillyground,fourscientistsreported,Thisgroundshouldbesearchedformetal.Fromanairplaneoverahillywastelandascientistsentbackbyradiooneword:Uranium.NoneofthescientistshadX-rayeyes:theyhadnomagicpoweroflookingdownbelowtheearth’ssurface.Theyweremerelyputtingtouseoneofthenewestmethodsoflocatingmineralsintheground...treesandplantsassignsthatcertainmineralsmayliebeneaththegroundonwhichthetreesandplantsaregrowing.Thisnewestmethodofsearchingformineralsisbasedonthefactthatmineralsdeepintheearthmayaffectthekindofbushesandtreesthatgrowinthesurface.AtWatsonBarGreek,abrook(小溪)sixthousandfeethighinthemountainsofBritishColumbia,Canada,amineralsearchgroupgatheredbagsoftreeseeds.Boxeswerefilledwithsmallbranchesfromthetrees.Rootsweredugandputintoboxes.Eachbagandboxwascarefullymarked.Inascientificlaboratory,thepartsoftheforesttreeswereburnedtoashesandtested.Eachsmallpartwasexaminedtolearnwhetherthereweremineralsinit.Studyoftheroots,branches,andseedsshowednosilver.Butthereweresmallamountsofgoldintherootsandalittlelessgoldinthebranchesandseeds.Theseedsgrowingnearesttothetreetrunkshadmoregoldthanthosegrowingontheendsofthebranches.26.Scientistswereflyingoveradesertorahillywastelandor.amountainareainordertosearchforintheground.A.goldB.silverC.uraniumD.minerals27.Thestudyoftrees,branchesandrootsshowsthatA.therewerelargeramountsofgoldinthebranchesthanintheseedsB.thereweresmalleramountsofgoldintherootsthaninthebranchesC.therewerelessamountsofgoldintheseedsgrowingontheendsofbranchesthanseedsgrowingnearesttothetreetrunksD.therewasmoregoldinthebranchesthanintheroots28.Whichisthebesttitlesuggestedbelow?A.ScientistsSearchingforMetalswithSpecialPowerB.NewMethodsofSearchingforMineralsC.GoldCouldBeFoundbyTreesandPlantsD.ANewMethodofSearchingforMinerals--UsingTreesandPlants29.WhichofthefollowingisNOTmentionedaspartofatreethatcanhelpfindminerals?A.LeavesB.RootsC.BranchesD.Seeds30.ThescientistsweresearchingformineralsbyusingA.X-rayB.magicpowerC.aspecialinstrumentD.trainedeyes參考答案及解析26.D語義理解題。根據(jù)文章第一段的內(nèi)容提到各種金屬，而這些金屬元素是包含在礦(mineral)里的。故本題選擇D.27.C細(xì)節(jié)題。從文中最后一句Theseedsgrowingnearesttothetreetrunkshadmoregoldthanthosegrowingontheendsofthebranches.(長在最接近樹干上的種子比長在樹枝根部的種子要含有更多的金元素)可知答案。故本題選擇c.28.D主旨題。通讀全文可知文章的大部分(第二至五段)都在講述通過植物來尋找礦藏。故本題選擇D.29.A細(xì)節(jié)題。從最后一段可知，通過研究roots，branch