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
82
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
Marswithitsorange-redcolourhasfascinatedpeoplesinceancienttimes.I
综合布线系统的设备间,其位置的设置宜符合哪项要求?( )A.靠近低压配电室
患者,男,60岁。因晕厥被他人送到急诊科。急查心电图示窦性心动过缓,心率48次/
合法合规是商业银行得以生存和健康持续发展的基础前提。()
风险规避主要是通过( )来实现的。A.风险与收益相匹配 B.设立有限的风险忍
A.保护人民身体健康 B.维护医务人员合法权益 C.维护医疗机构权益 D.
若股价突破了该范围一定的百分比(通常为收盘价突破3%),那么就被确认为是真正的
某年夏季,某农户自家种植的蔬菜因天气干旱长势不好,所以采摘后腌制咸菜,次日该农户
建设工程项目投资决策完成后,有效控制工程造价的关键在于()。A:审核施工图预算
某企业在12月5日,转让无形资产使用权收入5000元,出租固定资产收入7000元
最新回复
(
0
)