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, scien
Oceanography has been defined as "The application of all sciences to the study of the sea". Before the nineteenth century, scien
admin
2013-06-03
46
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 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 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, which lasted four years and brought home thousands of samples from the sea.
Their classification and analysis occupied scientists for years and led to a fivevolume 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,本文介绍了早期的海洋地理学探索。
转载请注明原文地址:https://jikaoti.com/ti/uu2FFFFM
0
大学英语四级
相关试题推荐
Itisoftenthroughgooddinnersthatonemakesfriends.InJapan,thereare【B1】______"DiningGroups"or"WineGroups",formedb
A、They’remembersoftheLatincluboncampus.B、Musicistheirmajorfieldofstudy.C、Theyattendedthesameconcert.D、Theyw
A、TheAirFranceCounterisontherightside.B、ThereisalongqueueattheAirFranceCounter.C、TheBritishAirwayscounter
Butforhisgoodeducation,he______(就不会得到这份体面的工作).
While,almosteverydepartmentofthefederalgovernmentisconcernedaboutandinvolvedwithsomeaspectsofeducation,and【C1】
________________(为了找到一份满意的工作),onemustknowwherehisinterestliesandwhathisabilityis.
Childrenmodelthemselveslargelyontheirparents.Theydosomainlythroughidentification.Childrenidentify【C1】______apar
Childrenmodelthemselveslargelyontheirparents.Theydosomainlythroughidentification.Childrenidentify【C1】______apar
Thesetechnicalachievementsshouldbe______byacommitteeofexpertsbeforetheyareputintouse.
假如你是李明,写一封求职信,内容包括:1.你对8月18日在21stCentury报上所登的招聘外贸经理的广告很感兴趣。2.你是某重点大学一名四年级学生,今年七月毕业,所学专业为国际贸易,以及其他情况。3.随函附上中英文简历,期望有机会到贵公司面试
随机试题
A.补肺益气B.补肾纳气C.两者皆是D.两者皆非(1993年第117,118题)喘促口久,动则喘甚,呼多吸少,短气神疲,自汗畏风,形寒肢冷,舌质淡,苔黑润,脉沉弱。治法是()
具有抗氧化功能的水溶性维生素是
中医药信息涉及到下列哪些方面
索赔文件是承包商向业主索赔的正式书面材料,也是业主审议承包商索赔请求的主要依据。索赔文件不包括()
下列选项中可以引起税务代理关系变更的有()。
金融期货的买人方对是否履约具有选择的权利。()
下列关于海洋专属经济区的叙述,正确的是()。
A、 B、 C、 D、 BA、C、D中的梯形是必须翻转才能得到左图中的梯形,故本题选B。
简述清末修律的主要特点和历史意义。
设其中函数f,g具有二阶连续偏导数,求
最新回复
(
0
)