首页
登录
职称英语
The ocean bottom—a region nearly 2.5 times greater than the total land area
The ocean bottom—a region nearly 2.5 times greater than the total land area
游客
2023-12-27
53
管理
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 3,600 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 forbidding 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 rock 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 understanding the world’s past climates. Deep-ocean sediments provide a climatic record stretching back hundreds of millions of years, because they are largely isolated from the mechanical erosion and the intense chemical and biological activity 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. [br] Which of the following is NOT mentioned in the passage as being a result of the Deep Sea Drilling Project?
选项
A、Geologists were able to determine the Earth’s appearance hundreds of millions of years ago.
B、Two geological theories became more widely accepted.
C、Information was revealed about the Earth’s past climatic changes.
D、Geologists observed forms of marine life never before seen.
答案
D
解析
是非题型。 根据第三段第三句The Glomar Challenger’s core samples have allowed geologists to reconstruct what the planet looked like hundreds of millions of years ago…和最后一句…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.及第四段,可知A、B、C三项正确。选项D在文中未提到。
转载请注明原文地址:https://www.tihaiku.com/zcyy/3310746.html
相关试题推荐
TheregionaroundtheBelgiancityofWaterlooisbusilypreparingtocommemo
ArecentstudybyOxfordUniversityestimatesthatnearlyhalfofalljobsin
ItsDutch-speakingregionswerepartoftheKingdomoftheNetherlands,whileth
这种“自下而上”式的改革方式,力求进一步理顺中央和地方的金融管辖权,有效缓解中小企业融资难。This"bottomtotop"approachtof
ArecentstudybyOxfordUniversityestimatesthatnearlyhalfofalljobsi
Theoceanbottom—aregionnearly2.5timesgreaterthanthetotallandarea
Theoceanbottom—aregionnearly2.5timesgreaterthanthetotallandarea
Theoceanbottom—aregionnearly2.5timesgreaterthanthetotallandarea
Theoceanbottom—aregionnearly2.5timesgreaterthanthetotallandarea
Theoceanbottom—aregionnearly2.5timesgreaterthanthetotallandarea
随机试题
Moreandmorecollegestudentscomplainthatgraduationmeansthecomingof
急性胆囊炎B超提示胆囊出现A.萎缩 B.回声减弱 C.壁变薄 D.双壁征
根据《上市公司收购管理办法》的规定,甲、乙均持有上市公司股票,不考虑其他因素,甲
一退休教师,小腿青筋怒张、迂曲20余年,久站久行或劳累时青筋迂曲加重,伴下坠不适
根据《测绘生产成本费用定额》,测绘工作项目设计费用占成本费用的比例为()。A:1
关于价值与交换价值关系的说法,正确的有( )。 A.价值与交换无关
人民警察的录用与国家公务员的录用一样,录用原则是( )A.公开 B.平等
财务顾问在上市公司所属企业境外上市的持续督导包括()。A:财务顾问的持续督导时间
下列垄断行为案件中,可以由国务院市场监管总局管辖的是()。A.某省区域内的垄断协
根据《煤矿井巷工程质量验收规范》GB50213—2010的规定,工程项目的质量
最新回复
(
0
)