首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Flying over a desert area in an airplane, two scientists looked down with trained eyes at trees and bushes. After an hour’ s fli
Flying over a desert area in an airplane, two scientists looked down with trained eyes at trees and bushes. After an hour’ s fli
admin
2014-01-27
32
问题
Flying over a desert area in an airplane, two scientists looked down with trained eyes at trees and 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 scientist sent back by radio one word: " Uranium. "
None of the scientists had X-ray eyes: they had no magic power of looking down below the earth’ s surface. They were merely putting to use one of the newest methods of locating minerals in the ground.. . trees and plants as signs that certain minerals may lie beneath the ground on which the trees and plants are growing.
This newest method of searching for minerals is based on the fact that minerals deep in the earth 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 small branches from the trees. Roots were dug and put into boxes. Each bag and box was carefully marked. 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 of gold in the roots and a little less gold in the branches and seeds. The seeds growing nearest to the tree trunks had more gold than those growing on the ends of the branches.
Which of the following is NOT mentioned as part of a tree that can help find minerals?
选项
A、Leaves.
B、Roots.
C、Branches.
D、Seeds.
答案
A
解析
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。
转载请注明原文地址:https://kaotiyun.com/show/rAjd777K
本试题收录于:
公共英语三级笔试题库公共英语(PETS)分类
0
公共英语三级笔试
公共英语(PETS)
相关试题推荐
Text...Fossilfuelsburnedto【C1】______carsandtrucks,【C2】______homesandbusinesses,andpowerfactoriesare【C3】______for
Howmanypeopleactuallyshowedupforthemeeting?
Text…Incontrast,SanFrancisco【C1】______Japanofitscolonialempireandarmed【C2】______butsoughttocultivatereform【
Text…Incontrast,SanFrancisco【C1】______Japanofitscolonialempireandarmed【C2】______butsoughttocultivatereform【
TextTheevolutionofartificialintelligenceisnowproceedingsorapidlythat【C1】______theendofthecenturycheapcompute
Text…Thegreatestadvantageofbooksdoesnotalwayscomefromwhatwerememberofthem,butfromtheir【C1】______.Agoo
Awisemanoncesaidthattheonlythingnecessaryforthetriumphofevilisforgoodmentodonothing.So,asapoliceoffice
Itmusthavebeenaftertwoo’clockinthemorningwhenthelastguests【C1】______theirleave,andalthoughwehadenjoyedtheir
Whatdoesthemanproposetodonextyear?
随机试题
宋代总理全国军务的最高机关是()
Ithinkthesetraditionalcustomsshouldbe______.
关于风险识别结果不正确的是()。
企业根据消费者所处城镇的大小来细分市场的标准是()
婴儿笑的发展可分为以下阶段()。
下列说法不正确的是()。
根据以下资料,回答下列问题。国家统计局公布的《2011年城乡居民收入增长情况》称,通过对全国31个省(自治区、直辖市)7.4万户农村居民家庭和6.6万户城镇居民家庭进行抽样调查,2011年全国农村居民人均纯收入6977元,比上年增加1058元,剔
中国人民正在为实现中华民族伟大复兴的中国梦而奋斗。实现中国梦,是物质文明和精神文明均衡发展、相互促进的结果,没有文明的继承和发展,没有文化的弘扬和繁荣,就没有中国梦的实现。实现中国梦,是物质文明和精神文明比翼双飞的发展过程。随着中国经济社会不断发展,中华文
假定学生关系是S(S#,SNAME,SEX,AGE),课程关系是C(C#,CNAME,TEACHER),学生选课关系是SC(S#,C#,GRADE),要查找选修"COMPUTER"课程的女学生的姓名,将涉及到关系
Infuturetradethekeydevelopmenttowatchistherelationshipbetweentheindustrializedandthedevelopingnations.TheThir
最新回复
(
0
)