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
2016-04-30
34
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 (测探) 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/sSe7777K
0
大学英语四级
相关试题推荐
Nooneknowsexactlyhowmanydisabledpeoplethereareintheworld,but【C1】______suggestthefigureisover450million.Then
Thetwoeconomistscalltheirpaper"MentalRetirement,"andtheirfindingshavearousedtheinterestofbehavioralresearchers.
TheArtofFriendshipA)OneeveningafewyearsagoIfoundmyselfinananxiety.Nothingwasreallywrong—myfamilyandIwere
EndangeredPeoplesA)Today,itisnotdistance,butculturethatseparatesthepeoplesoftheworld.Thecentralquestionofour
ManyfamiliesintheUnitedStateshavealargerincomenowthaneverbefore,butpeoplearefindingitdifficulttomakeendsm
Imagineananimalthatbecomesfrozenincoldweather.Then,whenitgetswarmer,theanimalsimplyunfreezesandgoesbacktoi
Imagineananimalthatbecomesfrozenincoldweather.Then,whenitgetswarmer,theanimalsimplyunfreezesandgoesbacktoi
Theconceptofculturehasbeendefinedmanytimes,andalthoughnodefinitionhasachieveduniversalacceptance,mostofthede
A、Thedifferencebetweenajobdescriptionandjobspecification.B、Thedifferencebetweenwhatistaught,andhowitistaught.
随机试题
事业单位公开招聘工作人员的程序不包括()。
SQLServer2008数据库中,【11】视图是存储一个查询结果的数据库对象。
对脂肪和蛋白质消化作用最强的消化液是()。
A上关、下关、翳风B.三江、承泣、睛明C.大椎、身柱、灵台D.中枢、悬枢、中脘E.二眼、百会、命门治疗犬消化不良、呕吐、泄泻、胃痛宜选
A.龙胆泻肝汤B.五神汤C.济生肾气丸D.阳和汤E.五苓散子痰、脱疽均可服用的方剂是
如图,均匀砂质土壤装在容器中,设渗透系数为0.012cm/s,渗流流量为0.3m2/s,则渗流流速为()。
下列收入来源中,()是股票没有的。
数据库管理系统通常提供授权功能来控制不同用户访问数据的权限,这主要是为了实现数据库的()。
补写出下列名句名篇中的空缺部分。安得广厦千万间,___________,风雨不动安如山。(杜甫《茅屋为秋风所破歌》)
Undermorefavorableconditions,he______agreatgeneralbutheonlyendedupascaptain.
最新回复
(
0
)