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
Oceanography has been defined as "The application of all sciences to the study of the sea". Before the nineteenth century, s
Oceanography has been defined as "The application of all sciences to the study of the sea". Before the nineteenth century, s
admin
2013-04-06
49
问题
Oceanography has been defined as "The application of all sciences to the study of the sea".
Before the nineteenth century, scientists with an interest in the sea were few and far between. Certainly Newton considered some theoretical aspects of it in his writings, but he was reluctant to go to sea to further his work.
For most people the sea was remote, and with the exception of early intercontinental travelers or others who earned a living from the sea, there was little reason to ask many questions about it, let alone to ask what lay beneath the surface. The first time that the question "What is at the bottom of the oceans?" had to be answered with any commercial consequence was when the laying of a telegraph cable from Europe to America was proposed. The engineers had to know the depth profile (起伏形状) of the route to estimate the length of cable that had to be manufactured.
It was to Maury of the US Navy that the Atlantic Telegraph Company turned, in 1853, for information on this matter. In the 1840s, Maury had been responsible for encouraging voyages during which soundings (测深) were taken to investigate the depths of the North Atlantic and Pacific Oceans. Later, some of his findings aroused much popular interest in his book The Physical Geography of the Sea.
The cable was laid, but not until 1866 was the connection made permanent and reliable. At the early attempts, the cable failed and when it was taken out for repairs it was found to be covered in living growths, a fact which defied contemporary scientific opinion that there was no life in the deeper parts of the sea.
Within a few years oceanography was under way. In 1872 Thomson led a scientific expedition (考察), which lasted for four years and brought home thousands of samples from the sea. Their classification and analysis occupied scientists for years and led to a five-volume report, the last volume being published in 1895.
This passage is mainly about______.
选项
A、the beginnings of oceanography
B、the laying of the first undersea cable
C、the investigation of ocean depths
D、the early intercontinental communications
答案
A
解析
主旨题。通读全文可知,oceanography(海洋学)是全文的中心词,本文主要讲述海洋学是如何起步的,故答案为A。B、C只表述了原文中个别细节,并非主题;D跟全文无关。
转载请注明原文地址:https://kaotiyun.com/show/cWr7777K
0
大学英语四级
相关试题推荐
After1785,theproductionofchildren’sbooksintheUnitedStatesincreasedbutremainedlargelyreprintsofBritishbooks,of
A、Toattractmorestudents.B、Tomakethecoursessuitableforstudentsofalllevels.C、Toletthestudentshaveagoodrest.D
Auctions(拍卖)arepublicsalesofgoods,conductedbyanofficiallyapprovedauctioneer.Heaskedthecrowdtogatherintheauc
HowAmericansCelebrateChristmasChristmasisAmerica’smostpopularholiday.SomepeoplewillattendchurchandobserveC
Itisnaturalforyoungpeopletobecriticaloftheirparentsattimesandtoblamethemformostofthemisunderstandingsbetw
NaturalgasVehiclesKermittheFrogoncesaid,"It’snotthateasybeinggreen."Althoughhewasn’treferringtocars,hiso
JusticeisoneofthemostpopularcoursesinHarvard’shistory.NearlyonethousandstudentscrowdHarvard’shistoricSandersT
A、Shedidn’tlikethepaintingsthere.B、Shebelievedthepaintingcourseistooabstract.C、Shehadagoodtasteforthearts.
A、Workthesamenumberofhours;sameeducation,ageandunionstatus;liveindifferentregionsofthecountry.B、Liveinthes
随机试题
行政组织作为国家机器的重要组成部分,在本质上是一个()
A.河豚毒B.四乙胺C.阿托品D.箭毒选择性阻断Na+通道的物质是
当代中国法律渊源中最重要的部分是下列哪一选项?()
根据金融期货投资者适当性制度,关于综合评估中的投资经历,投资者应当提供近期加盖相关证券营业部机构业务专用章的()作为证券金融现货交易经历证明。[2015年3月真题]
下列属于财务顾问应当配合中国证监会工作的是()。Ⅰ.指定财务顾问主办人与中国证监会进行专业沟通,并按照中国证监会提出的反馈意见作出回复Ⅱ.按照中国证监会的要求对涉及本次并购重组活动的特定事项进行尽职调查或者核查Ⅲ.组织委托人及其他
随着雾霾天气长期大范围持续,空气净化器日益走进普通百姓家庭,售价看涨的走势成为该行业发展的催化剂,不考虑其他因素,能正确反映这种变动传导效应的是(注:D、S为变动前,D1、S1为变动后)()。
设连续函数f(x)满足,求f(x).
TheJapanesedesireformarriagehadbeenverystrong.Inthefifth"worldyouthattitudesurvey"【1】bytheManagementandCoordi
OnthemorningofSeptember11th,IboardedthetrainfromWashingtonHeightsinUpperManhattanjustasusualandwenttotheB
A、Animals’skins,jewelsandstone.B、Clay,paint,andcloth.C、Metals,animals’skinsandclay.D、Paint,clayandstone.D
最新回复
(
0
)