首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
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 l
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 l
admin
2008-01-10
37
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.
The Deep Sea Drilling Project was significant because it was ______.
选项
A、an attempt to find new sources of oil and gas
B、the first extensive exploration of the ocean bottom
C、composed of geologists from all over the world
D、funded entirely by the gas and oil industry
答案
B
解析
参看第二段第一句...the first detailed global investigation of the ocean bottom。
转载请注明原文地址:https://kaotiyun.com/show/s2gO777K
本试题收录于:
CATTI二级笔译综合能力题库翻译专业资格(CATTI)分类
0
CATTI二级笔译综合能力
翻译专业资格(CATTI)
相关试题推荐
TheUnitedStatescountsitspopulationeverytenyears,andeachcensusrevealsthattheracialandethnicmixischangingdram
TheUnitedStatescountsitspopulationeverytenyears,andeachcensusrevealsthattheracialandethnicmixischangingdram
Thestrongeffortstogainequalityforwomenintheworkplacebegantoshowresultsinthelastcentury:womenhavesincesecur
Startingaconversationisaseasyforsomepeopleaseatingandbreathing.However,ifyousufferfromsocialanxietydisorder
Thefirsttimecouldhavebeenchalkeduptocharmingidiosyncrasy.Thesecondseemedlikeanefforttobringsomelevitytoac
Inthemajorpalmoilproducingregions,IndonesiaandMalaysia,itisestimatedthatalmostone-thirdofforestlossinthepas
Dostudentslearnasmuchwhentheyreaddigitallyastheydoinprint?Forbothparentsandteachers,knowingwhethercomputer-
Iamblessedwithabuoyanttemperamentandenjoythepleasuresofthisearth.
ExtrapolatingfromhisAmericanfindings,hereckonsabout80%ofthesedeathsmightbeattributedtosmoking.
Ourape-menforefathershadnoobviousnaturalweaponsinthestruggleforsurvivalintheopen.Theyhadneitherthe【C1】_______
随机试题
构造实体几何表示法;
A.水和碳酸氢盐含量少、胰酶含量多B.水和胰酶含量多、碳酸氢盐含量少C.水和碳酸氢盐含量多、胰酶含量少D.水和胰酶含量少、碳酸氢盐含量多缩胆囊素引起胰液分泌的特点为
饮片在温度高、湿度大的环境中易吸潮变软发黏,易被污染的是
我国华北某新建机场A标段在土方施工结束后,施工单位按要求对分项工程进行自检,实测项目的自检结果是压实度合格率为94%,顶面高程和顶面平整度的合格率分别为90%和91%。问题:跑道端安全区的土方工程压实度的检测密度是多少?
下列关于账务操作说法正确的是()。
能力和知识、技能的关系表现为()。
下列各项中字形全都正确的一项是()。
《刑法》对放火罪规定了比失火罪更重的法定刑,体现了()。
我们在生活中发现湿袜子粘在脚上很难往下脱。下列解释正确的是()。
7,14,10,11,14,9,(),()。
最新回复
(
0
)