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
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
admin
2011-01-11
30
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
细节题型。 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/QXgO777K
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
Informationwillbethegreatestopportunityforbusinessleadersinthecomingyears—andperhapsourbiggestheadache.Since
Nootherqualityismoreimportantforanarmymantoacquireliketoobeyamilitaryorder.
Ashardasitistohaveanhonestdialogueaboutbusinessdecisions,itisevenhardertogiveindividualshonest______.Thisi
Thedifferenceisoftennotevenmentionedintextbooks,fortheresultisthatthelearnermaybeignorantaboutit.
LastDecember,visitorsarrivinginVail,Colo.,readytokickoffthewinterskiseason,immediatelynoticedsomethingmissing:
Thissummer,studentdebtreachedarecord$1.5trillionintheUnitedStates.Toputthatinperspective,student-loanborrowe
Thissummer,studentdebtreachedarecord$1.5trillionintheUnitedStates.Toputthatinperspective,student-loanborrowe
Ifpolicearecarryingarmsasamatterofcoursethendoesn’titencouragecriminalstocarrythem?
Theskyhadaneerieyellow-orangehue,withthesunglowingbehindapeculiarhaze.
Thevillagerswere______bythenewsofthecriminal’sreleasefromtheprison.
随机试题
患儿,3岁,发热3d,昏迷2d。T38℃,伴有颈抵抗,病理反射阳性,呼吸快慢不均,有双吸气,两肺未闻湿哕音,心率140次/分,血气PaO245mmHg,PaCO255mmHg。考虑为
女,40岁,发热,伴全身酸痛1个月,加重伴出血倾向,一周来病情加重,刷牙时牙龈出血。病后进食减少,睡眠差,体重无明显变化。查体:前胸和下肢皮肤有少许出血点,咽充血(+),胸骨轻压痛。化验:Hb80g/L,网织红细胞0.5%,WBC5.6×109/L,原
A.结构特异性药物B.结构非特异性药物C.手性药物D.分配系数E.药效构象属于药物的疗效主要受化学结构影响的是
以下哪一项幕墙类型不是按幂面材料进行分类的?[2007年第103题]
某新建铁路将穿过我国的一块重要湿地,并以隧道的形式穿过一座山梁,期间设有中间站、起始站和终点站。由于湿地有丹顶鹤等20余种候鸟在此繁殖育幼和过冬,工程的生态环境影响评价级别已定为一级。
与间接筹资相比,直接筹资的特点有()。
孤雁杜甫孤雁不饮啄,飞鸣声念群。谁怜一片影,相失万重云?望尽似犹见,哀多如更闻。野鸦无意绪,鸣噪自纷纷。诗人为什么要写野鸦这一形象?
完成将BX清零,并使标志位CF清零,下面指令错误的是( )。
以下关于列表框控件的叙述中,错误的是
Itisnotpolitetoarriveatadinnerpartymorethan15to20minuteslate.Thehostorhostessusuallywaitsforallthegues
最新回复
(
0
)