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1、2019 年公共英语三级阅读练习题十一 2019 年公共英语三级阅读练习题十一 Flying over a desert area in an airplane,two scientists looked down with trained eyes at treesand bushes.After an hours flight,one of the scientists wrote in his book,Look here for probable metal.Scientists in another airplane,flying over a mountain area,sent
2、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
3、 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 ba
4、sed 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 fr
5、om 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.
6、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.26.Scientists were flying over a desert or a hilly wasteland or.a mountain area in order tosearch
7、 forin the ground.A.gold B.silver C.uranium D.minerals 27.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 growi
8、ng 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 28.Which is the best title suggested below?长在树枝根部的种子要含有更多的金元素可知答案故本题选择主旨题通读全文可知文章的大部分第二至五段都在讲述故本题选择细节题从文章第一段的第一句两位科学家用受过训练的眼睛观察树木和灌木可知答案故本题选择 A.Scientists Searching for Me
9、tals 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 29.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 30.Th
10、e scientists were searching for minerals by using A.X-ray B.magic power C.a special instrument D.trained eyes 参考答案及解析 26.D 语义理解题。根据文章第一段的内容提到各种金属，而这些金属元素是包含在矿(mineral)里的。故本题选择 D.27.C 细节题。从文中最后一句 The seeds growing nearest to the tree trunks had more gold than those growing on the ends of the branches
11、.(长在最接近树干上的种子比长在树枝根部的种子要含长在树枝根部的种子要含有更多的金元素可知答案故本题选择主旨题通读全文可知文章的大部分第二至五段都在讲述故本题选择细节题从文章第一段的第一句两位科学家用受过训练的眼睛观察树木和灌木可知答案故本题选择有更多的金元素)可知答案。故本题选择 c.28.D 主旨题。通读全文可知文章的大部分(第二至五段)都在讲述通过植物来寻找矿藏。故本题选择D.29.A 细节题。从最后一段可知，通过研究 roots，branches 和 seeds 可判定地下是否有矿产，而 leaves 在文章中却没有提到。故本题选择 A.30.D 细节题。从文章第一段的第一句 two scientists looked down with trained eyes at trees and bushes(两位科学家用受过训练的眼睛观察树木和灌木)可知答案。故本题选择 D.长在树枝根部的种子要含有更多的金元素可知答案故本题选择主旨题通读全文可知文章的大部分第二至五段都在讲述故本题选择细节题从文章第一段的第一句两位科学家用受过训练的眼睛观察树木和灌木可知答案故本题选择