首页
登录
职称英语
The ocean bottom — a region nearly 2. 5 times greater than the total land ar
The ocean bottom — a region nearly 2. 5 times greater than the total land ar
游客
2025-01-21
8
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 allowedgeologists to reconstruct what the planet looked like hundreds of millions ofyears ago…和最后一句…nearly all earth scientists agree on the theories ofplate tectonics and continental drift that explain many of the geologicalprocesses 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/3922703.html
相关试题推荐
Itisknowntoallthatchildreninthisregionhavestrong______toswimmingin
RainabatesinthefallthroughoutmostoftheAppalachianMountainregion.A、pou
Attemptshavebeenmadefornearlythreedecadestoincreasetheamountofpreci
Foralongtimeinthatvastregion,thislawwasinabeyance.A、activeuseB、dou
Theoceanbottom—aregionnearly2.5timesgreaterthanthetotallandar
Theoceanbottom—aregionnearly2.5timesgreaterthanthetotallandar
Theoceanbottom—aregionnearly2.5timesgreaterthanthetotallandar
Theoceanbottom—aregionnearly2.5timesgreaterthanthetotallandar
Theoceanbottom—aregionnearly2.5timesgreaterthanthetotallandar
Theoceanbottom—aregionnearly2.5timesgreaterthanthetotallandar
随机试题
[originaltext]Three-fourthsoftheworldiscoveredwithwater.Butonlyab
Overtheyears,collegestudentshavestoodtogetherforwhattheybelievei
TheChinesefilmsuperstaroncesaidthathewouldrather______rememberedasac
A.建设投资斜线 B.主要原材料价格线 C.销售价格线 D.成本线
乙公司2×17年1月1日以银行存款1000万元从证券市场购入丙公司的股票100万
关于证券发行后,保荐代表人的更换规定不正确的是( )。A.证券发行后,除规定原
下列测量对象中,属于地籍要素测量的有()。A、建筑物 B、永久性构筑物 C、
阴道分泌物呈灰黄色、稀薄泡沫状,伴外阴及阴道瘙痒,可见于()。A.老年性阴道炎
效率合约曲线中,效率合约是指()。A.工会的无差异曲线 B.雇主的等利润曲线
下列选项中,属于2004年宪法修正案内容的有( )。 A.增加“依法治国,建
最新回复
(
0
)