本文格式為Word版，下載可任意編輯——公共英語(yǔ)三級(jí)試題閱讀提分訓(xùn)練公共英語(yǔ)三級(jí)試題閱讀提分訓(xùn)練

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Flyingoveradesertareainanairplane,twoscientistslookeddownwithtrainedeyesattreesandbushes.Afteranhoursflight,oneofthescientistswroteinhisbook,Lookhereforprobablemetal.Scientistsinanotherairplane,flyingoveramountainarea,sentamessagetootherscientistsontheground,Goldpossible.Walkingacrosshillyground,fourscientistsreported,Thisgroundshouldbesearchedformetal.Fromanairplaneoverahillywastelandascientistsentbackbyradiooneword:Uranium.

NoneofthescientistshadX-rayeyes:theyhadnomagicpoweroflookingdownbelowtheearthssurface.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.gold

B.silver

C.uranium

D.minerals

27.Thestudyoftrees,branchesandrootsshowsthat

A.therewerelargeramountsofgoldinthebranchesthanintheseeds

B.thereweresmalleramountsofgoldintherootsthaninthebranches

C.therewerelessamountsofgoldintheseedsgrowingontheendsofbranchesthanseedsgrowingnearesttothetreetrunks

D.therewasmoregoldinthebranchesthanintheroots

28.Whichisthebesttitlesuggestedbelow?

A.ScientistsSearchingforMetalswithSpecialPower

B.NewMethodsofSearchingforMinerals

C.GoldCouldBeFoundbyTreesandPlants

D.ANewMethodofSearchingforMinerals--UsingTreesandPlants

29.WhichofthefollowingisNOTmentionedaspartofatreethatcanhelpfindminerals?

A.Leaves

B.Roots

C.Branches

D.Seeds

30.Thescientistsweresearchingformineralsbyusing

A.X-ray

B.magicpower

C.aspecialinstrument

D.trainedeyes

參考譯文

坐著飛機(jī)飛過(guò)一片沙漠之地，兩位科學(xué)家用訓(xùn)練有素的眼睛觀測(cè)下面的樹(shù)木和灌木叢。經(jīng)過(guò)大致一小時(shí)的飛行查看后，其中一位科學(xué)家在他的本子上寫(xiě)下這樣一句話"看這里可能有金屬礦藏。'另一架飛機(jī)上的科學(xué)家們正飛過(guò)一座山區(qū)。他們給地面查看站的科學(xué)家們發(fā)了"可能有金礦'的信息。步行越過(guò)山地，四名科學(xué)家得出報(bào)告："理應(yīng)在此地探索金屬礦藏'。從飛過(guò)多山丘的荒原的飛機(jī)上，一位科學(xué)家用無(wú)線電發(fā)回一個(gè)字："鈾'。

沒(méi)有一個(gè)科學(xué)家具有x射線那樣的眼睛：他們并沒(méi)有看透地球外觀的魔力。他們僅僅使用了一個(gè)最新的技術(shù)來(lái)定位地下的礦藏樹(shù)木和植被長(zhǎng)在地上，通過(guò)他們能顯示出某種埋藏在地下的礦物。

這項(xiàng)最新的探索礦藏的技術(shù)是依據(jù)這樣一個(gè)事實(shí)，即處在地下的礦物會(huì)影響到地面上灌木和樹(shù)木的生長(zhǎng)。

沃森巴溪是加拿大英屬哥倫比亞一座6，000英尺的山上的一條小溪。一隊(duì)礦藏探尋小組收集了大量包樹(shù)木的種子;盒子里盛滿了小樹(shù)枝。樹(shù)根也被挖掉放進(jìn)盒子里。每個(gè)包和盒子都被留心標(biāo)記了。在科學(xué)測(cè)驗(yàn)室內(nèi)，樹(shù)枝被燒成灰然后做檢測(cè)。檢查每個(gè)細(xì)小的片面是否含有礦藏。

對(duì)樹(shù)根、樹(shù)枝和種子的`檢測(cè)并沒(méi)察覺(jué)銀元素，但卻在樹(shù)根部察覺(jué)了片面金元素，同時(shí)在樹(shù)枝和種子中也察覺(jué)了較少的金元素。長(zhǎng)在最接近樹(shù)干上的種子要比長(zhǎng)在樹(shù)枝根部的種子含金元素多一些。

答案及解析

26.D語(yǔ)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。故此題選擇D.

27.C細(xì)節(jié)題。從文中結(jié)果一句Theseedsgrowingnearesttothetreetrunkshadmoregoldthanthosegrowingontheendsofthebranches.長(zhǎng)在最接近樹(shù)干上的種子比長(zhǎng)在樹(shù)枝根部的種子要含有更多的金元素可知答案。故此題選擇c.

28.D主旨題。通讀全文可知文章的大片面其次至五段都在陳述通過(guò)植物來(lái)探索礦藏。故此題選擇D