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
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
admin
2017-04-09
41
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.
Deep-ocean sediments provide better information about the world’s past climate because they________.
选项
A、are well protected
B、have land-based evidence
C、are in isolation
D、have a longer history
答案
A
解析
细节题型。答案出自第四段第二句Deep-ocean sediments provide a climatic record stretching back hundreds of millions of years...
转载请注明原文地址:https://www.kaotiyun.com/show/doMO777K
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
Startingaconversationisaseasyforsomepeopleaseatingandbreathing.However,ifyousufferfromsocialanxietydisorder
Newtechnologylinkstheworldasneverbefore.Ourplanethasshrunk.It’snowa"globalvillage"wherecountriesareonlyseco
Insuranceisthesharingof【C1】________Nearlyeveryoneisexposed【C2】________riskofsomesort.Thehouseowner,forexample,kn
Salestactics,likeadvertising,reflectaspectsofthebasicassumptionsandvaluesthatprevailinacountry.Bycarefullylis
TheCentre,occupyinganareaof470,000squaremetersandatotalconstructionareaof160,000squaremeters,iscomposedofth
A、正确B、错误A词义理解题。关于成功和领导能力的关系,文中说successandtheabilitytocontrolourownfatearelinkedtoourabilitytolead即成功和掌控我们自身命运的能
Aninitialsurveyof2,000UKemployeesrevealedthathalfregularlylistentomusic【C1】______.Someofthoseemployees’bosses
Aninitialsurveyof2,000UKemployeesrevealedthathalfregularlylistentomusic【C1】______.Someofthoseemployees’bosses
TheMeToomovementinIndiagained【C1】______lastyearwhenpopularfiguresdecidedtocomeoutwiththeirstoriesofsexualabu
ConstructionisexpandingalloverChina,nodoubtmanymaterialswillbeneededataverybigamountinfuture.
随机试题
设a={2,3,4},b={3,一1,一1},则a在b上的投影为_________.
急性化脓性根尖周炎的症状如下,不正确的是
对闲置土地处置方案可以选择的方式有()。
(2005年)图8—71所示电路中,二极管视为理想元件,即正向电压降为零,反向电阻为无穷大。三极管的β=100。输入信号UA、UB的高电平是3.5V(逻辑1),低电平是0.3V(逻辑0),若该电路的输出电压U0为高电平时定为逻辑1,图8—61示电路应为(
当债券的收益率不变,债券的到期时间与债券价格的波动幅度之间成反比关系。()
下列经济业务可以用现金结算的有()。
公安机关及其人民警察在行使行政职权过程中,有()情形的,受害人无权取得赔偿。
A.非选择性门体分流术B.单纯脾切除C.贲周血管离断术D.肝移植对于门静脉高压症顽固性腹水最有效的手术方式是
当个人理想与社会理想发生矛盾时,我们应该()
下面不属于软件测试实施步骤的是
最新回复
(
0
)