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
2019-01-10
24
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://jikaoti.com/ti/1YLsFFFM
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
Although"liedetectors"arewidelyusedbygovernments,policedepartmentsandbusinesses,theresultsarenotalwaysaccurate.
Whatisthemainpurposeoftheman’strip?
Readthefollowingtextsfromamagazinearticleinwhichfivebusinessleaderstalkedabouttheirpredictionsforhigh-techdev
AftertheviolentearthquakethatshookLosAngelesin1994,earthquakescientistshadgoodnewstoreport:Thedamageanddeath
AftertheviolentearthquakethatshookLosAngelesin1994,earthquakescientistshadgoodnewstoreport:Thedamageanddeath
Everyobjecttellsastory.Eventhemostordinaryobjectscanpresentuswithpowerfulimages.Sometimesitistheordinarynat
Whataretheman’shobbies?
Lastweek,onaflighttoWashington,Imetaself-assuredbusinessmanwhoaskedmeaboutmyprofessionwhensittinghimselfco
AnembarrassingexperienceItwasthesmallhoursofthemorningwhenwereachedLondonAirport.IhadcabledLondonfromAm
What’stheairportlike?
随机试题
下列汉字,笔画之间的组合关系属于相离关系的是()
请简述配送中心规划的内容。
衡量组织兴奋性的指标是
患者,男,62岁。左上5、6、7及右上4、5、6、7缺失,可摘局部义齿初戴后1个月,咀嚼时常咬颊黏膜,下颌舌侧第一磨牙至磨牙后垫区压痛,来院复诊。咬颊黏膜可能原因
含马兜铃酸而致肾衰的中药有()
图示外伸梁,A截面的剪力为()。
下列说法中正确的有()。
Hardly______thephone______Iwastoldthatthehotelhadbeenbookedfull.
•ReadthearticlebelowaboutproductivitygrowthofthenewentrantsinEU.•ChoosethebestwordtofilleachgapfromA,B,C
WhatcausedsomeHamasmemberstobearrested?
最新回复
(
0
)