全國(guó)英語(yǔ)等級(jí)考試三級(jí)模擬題：閱讀理理（十）

Flying over a desert area in an airplane,two scientists looked down with trained eyes at treesand bushes.After an hour's flight,one of the scientists wrote in his book,"Look here for probable metal."Scientists in another airplane,flying over a mountain area,sent a message to other scientists on the ground,"Gold possible."Walking across hilly ground,four scientists reported,"This ground should be searched for metal."From an airplane over a hilly wasteland a scientistsent back by radio one word:"Uranium."

None of the scientists had X-ray eyes:they had no magic power of looking down below theearth's surface.They were merely putting to use one of the newest methods of locating minerals inthe ground...trees and plants as signs that certain minerals may lie beneath the ground on whichthe trees and plants are growing.

This newest method of searching for minerals is based on the fact that minerals deep in theearth may affect the kind of bushes and trees that grow in the surface.

At Watson Bar Greek,a brook（小溪）six thousand feet high in the mountains of British Columbia,Canada,a mineral search group gathered bags of tree seeds.Boxes were filled with smallbranches from the trees.Roots were dug and put into boxes.Each bag and box was carefullymarked.In a scientific laboratory,the parts of the forest trees were burned to ashes and tested.Each small part was examined to learn whether there were minerals in it.

Study of the roots,branches,and seeds showed no silver.But there were small amounts ofgold in the roots and a little less gold in the branches and seeds.The seeds growing nearest to thetree trunks had more gold than those growing on the ends of the branches.

1、Which of the following is NOT mentioned as part of a tree that can help find minerals?

A.Leaves.

B.Roots.

C.Branches.

D.Seeds.

參考答案：A

參考解析：細(xì)節(jié)題。從最后一段可知，通過(guò)研究roots，branches和seeds可判定地下是否有礦產(chǎn)，而leaves在文章中卻沒(méi)有提到。故本題選擇A.

2、Scientists were flying over a desert or a hilly wasteland or.a mountain area in order tosearch forin the ground.

A.gold

B.silver

C.uranium

D.minerals

參考答案：D

參考解析：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。故本題選擇D.

3、The scientists were searching for minerals by using

A.X-ray

B.magic power

C.a special instrument

D.trained eyes

參考答案：D

參考解析：細(xì)節(jié)題。從文章第一段的第一句"two scientists looked down with trained eyes at trees and bushes"（兩位科學(xué)家用受過(guò)訓(xùn)練的眼睛觀察樹(shù)木和灌木）可知答案。故本題選擇D.

4、The study of trees,branches and roots shows that

A.there were larger amounts of gold in the branches than in the seeds

B.there were smaller amounts of gold in the roots than in the branches

C.there were less amounts of gold in the seeds growing on the ends of branches than seeds growing nearest to the tree trunks

D.there was more gold in the branches than in the roots

參考答案：C

參考解析：細(xì)節(jié)題。從文中最后一句"The seeds growing nearest to the tree trunks had more gold than those growing on the ends of the branches."（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。故本題選擇C.

5、Which is the best title suggested below?

A.Scientists Searching for Metals with Special Power

B.New Methods of Searching for Minerals

C.Gold Could Be Found by Trees and Plants

D.A New Method of Searching for Minerals--Using Trees and Plants

參考答案：D

參考解析：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(guò)植物來(lái)尋找礦藏。故本題選擇D.

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)練有素的眼睛察看下面的樹(shù)木和灌木叢。經(jīng)過(guò)大致一小時(shí)的飛行觀察后，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?！绷硪患茱w機(jī)上的科學(xué)家們正飛過(guò)一座山區(qū)。他們給地面觀察站的科學(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：“應(yīng)該在此地尋找金屬礦藏”。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)有看透地球表面的魔力。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)最新的尋找礦藏的技術(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)礦藏搜索小組收集了許多包樹(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)包和盒子都被仔細(xì)標(biāo)記了。在科學(xué)實(shí)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)小的部分是否含有礦藏。

對(duì)樹(shù)根、樹(shù)枝和種子的檢測(cè)并沒(méi)發(fā)現(xiàn)銀元素，但卻在樹(shù)根部發(fā)現(xiàn)了部分金元素，同時(shí)在樹(shù)枝和種子中也發(fā)現(xiàn)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。