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
2023-12-26
27
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/3308143.html
相关试题推荐
Howmanyregionsareinvolvedintheinternationalstudy?[br][originaltext]
Howmanyregionsareinvolvedintheinternationalstudy?[br][originaltext]
Howmanyregionsareinvolvedintheinternationalstudy?[br][originaltext]
Howmanyregionsareinvolvedintheinternationalstudy?[originaltext]Does
Theworstoutcomesofclimatechangeincludethelossofnearlyallcoralreefs
InnearlyeverycasethefirstblackBritonstomovetotheUKdidsooftheiro
InthisrapidlygrowingEastAsianregion,weareexpectingtosee25millionmo
ItsDutch-speakingregionswerepartoftheKingdomoftheNetherlands,whileth
Attemptshavebeenmadefornearlythreedecadestoincreasetheamountofpreci
Theoceanbottom—aregionnearly2.5timesgreaterthanthetotallandarea
随机试题
Thefourmajormodesofsemanticchangeare______.A、extension,narrowing,eleva
MulticulturalEducation:PiecingTogetherthePuzzleToday,we’l
下列属于连续型变量的是A.体重 B.职称 C.身高 D.血压 E.皮试结
烧伤包括()。A.烫伤 B.热烧伤 C.电烧伤 D.火烧伤 E.化学烧
下列不属于清静养神的内容是()。A.恬淡虚无 B.劳耗心神 C.清净为本
下列不属于基金管理公司内部控制制度组成部分的是( )。A.基本管理制度 B.
对薪酬调查数据进行统计分析的方法有哪些?
为实现“事事有人负责”和“事事有条件负责”的愿景,企业的组织设计需要遵循的原则是
根据《中华人民共和国民法总则》(以下简称《民法总则》)规定,代理具有的特征有(
企业对境外经营的子公司外币资产负债表折算时,在不考虑其他因素的情况下,下列各项中
最新回复
(
0
)