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
2023-12-28
81
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
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://tihaiku.com/zcyy/3311441.html
相关试题推荐
Howmanyregionsareinvolvedintheinternationalstudy?[br][originaltext]
Howmanyregionsareinvolvedintheinternationalstudy?[originaltext]Does
Whatkindofscenemightbeshowninatypicalregionalistpainting?A、Peoplewor
Theworstoutcomesofclimatechangeincludethelossofnearlyallcoralreefs
InnearlyeverycasethefirstblackBritonstomovetotheUKdidsooftheiro
InthisrapidlygrowingEastAsianregion,weareexpectingtosee25millionmo
TheregionaroundtheBelgiancityofWaterlooisbusilypreparingtocommemo
ItsDutch-speakingregionswerepartoftheKingdomoftheNetherlands,whileth
Foralongtimeinthatvastregion,thislawwasinabeyance.A、activeuseB、dou
Theoceanbottom—aregionnearly2.5timesgreaterthanthetotallandarea
随机试题
Theloveofbeautyisanessentialpartofallhealthyhumannature.Itisa
LadiesandGentlemen,WelcometoLondonInternationalLanguageCenter.Wete
RainabatesinthefallthroughoutmostoftheAppalachianMountainregion.A、po
DearSir,Muchtomyregret,Iwritethislettertocomplainaboutyourcomp
CBR试验制件时,需制3组不同的干密度试件,这3组试件每层击实次数分别为()。
室内拌制沥青混合料时,应将沥青混合料拌和机预热至拌和温度以上10℃备用。(
厌氧菌盆腔感染的特点是容易形成_________________、_______
王先生将1000元人民币存入银行,存期2年,年利率为12%,半年计息1次,则2年
下列选项中,属于程序性知识的是()A.关于袋鼠的含义 B.刘翔的个人档案
有一种大气污染物,水溶性,易被上呼吸道吸收,对眼、鼻及支气管有很强刺激作用;动物
最新回复
(
0
)