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
The ocean bottom (a region nearly 2.5 times greater than the total land area of the Earth) is a vast frontier that even today is
The ocean bottom (a region nearly 2.5 times greater than the total land area of the Earth) is a vast frontier that even today is
admin
2010-07-06
41
问题
The ocean bottom (a region nearly 2.5 times greater than the total land area of the Earth) is a vast frontier that even today is largely unexplored and uncharted. Until about a century ago, the deep-ocean floor was completely inaccessible, hidden beneath waters averaging over 36,000 meters deep. Totally without light and subjected to intense pressures hundreds of times greater than at the Earth’s surface, the deep-ocean bottom is a hostile environment to humans, in some ways as forbid- ding and remote as the void of outer space.
Although researchers have taken samples of deep-ocean rocks and sediments for over a century, the first detailed global investigation of the ocean bottom did not actually start until 1968, with the beginning of the National Science Foundation’s Deep Sea Drilling Project (DSDP). Using techniques first developed for the offshore oil and gas industry, the DSDP’s drill ship, the Glomar Challenger, was able to maintain a steady position on the ocean’s surface and drill in very deep waters, extracting samples of sediments and rocks from the ocean floor.
The Glomar Challenger completed 96 voyages in a 15-year research program that ended in November 1983, During this time, the vessel logged 600,000 kilometers and took almost 20,000 core samples of seabed sediments and rocks at 624 drilling sites around the world. The Glomar Challenger’s core samples have allowed geologists to reconstruct what the planet looked like hundreds of millions of years ago and to calculate what it will probably look like millions of years in the future. Today, largely on the strength of evidence gathered during the Glomar Challenger’s voyages, nearly all earth scientists agree on the theories of plate tectonics and continental drift that explain many of the geological processes that shape the Earth.
The cores of sediment drilled by the Glomar Challenger have also yielded information critical to understand the world’s past climates. Deep-ocean sediments provide a climatic record tracing back hundreds of millions of years, because they are largely isolated from the mechanical erosion and the intense chemical and biological activies that rapidly destroy much land-based evidence of past climates. This record has already provided insights into the patterns and causes of past climatic change information that may be used to predict future climates.
Tire author’s attitude towards the research of ocean bottom might be best summarize as one of______.
选项
A、optimistic.
B、indifferent.
C、impartial.
D、critical.
答案
C
解析
本题是一个观点态度题,要求考生对作者的态度作出推断。解答这种类型的推断题要建立在对全文结构和语气的理解的基础上。
转载请注明原文地址:https://kaotiyun.com/show/C0Dd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
Payandproductivity,itisgenerallyassumed,shouldberelated.Buttherelationshipseemstoweaken【C1】________peoplegetold
HowhavetheoncereasonablypricedholidaysinEuropebecometoAmericans?HowhasforeigninvestingintheUSbecomesinceth
AccordingtoGertrudeMongella,theequalitybetweenwomenandman______.Allthefollowingarementionedinthepassageasty
Thereare______inlittlegirls’conversationsthaninboys’accordingTotheresearch.Somescientistsbelievethatthebrain
UseoftheillegaldragnamedEcstasy(MDMA)hasincreasedalarminglyinBritainoverthelastfewyears,andin1992theBritis
Veryearlyinthemorning,beforedaybreakforthegreaterpartoftheyear,themenwouldthrowontheirclothes,breakfaston
Ithasbeennecessarytoreferrepeatedlytotheeffectsofthetwoworldwarsinpromotingallkindsofinnovation.Itshouldb
Wheredoesthisdialoguetakeplace?Ata______.
Wheredoesthisdialoguetakeplace?Ata______.
随机试题
男性尿道管径最粗的部位是
治疗癫痫强直阵挛性发作的首选药是
可判断有机磷杀虫药中毒的严重程度并指导治疗最有意义的是()
张某,女,70岁,因支气管哮喘急性发作入院治疗,经静脉输入药物2天后病情缓解。今天输液1小时后,病人突然面色苍白、呼吸困难、气促、咳嗽加重,咳血性泡沫样痰。处理措施中下述哪项不妥
下列有关施工现场安全警示的描述,错误的是()
稍大一些的建设工程项目总承包在多数条件下采用( )。
对中断概念的理解不正确的是()。
Likemanyotheraspectsofthecomputerage,Yahoobeganasanidea,【1】intoahobbyandlatelyhas【2】intoafull-timepassion.T
Lookatthenotesbelow.Someinformationismissing.Youwillhearadialogueontheseriousconditionofacompany.Foreachq
A、Hersonisstillhungry.B、Shedoesn’thaveenoughmoney.C、Hersonistoofat.D、Shedoesn’tknowwhattodo.C推理判断题。本题问“妈妈担心
最新回复
(
0
)