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
Explorer of the Extreme Deep Oceans cover more than two-thirds of our planet. Yet, just a small fraction of the underwater w
Explorer of the Extreme Deep Oceans cover more than two-thirds of our planet. Yet, just a small fraction of the underwater w
admin
2012-09-10
22
问题
Explorer of the Extreme Deep
Oceans cover more than two-thirds of our planet. Yet, just a small fraction of the underwater world has been explored. Now, Scientists at the Woods Hole Oceanographic Institution (WHOI) in Massachusetts are building an underwater vehicle hat will carry explorers as deep as 6, 500 meters (21, 320 feet). The new machine, known as a manned submersible or human-operated vehicle ( HOV) , will replace another one named Alvin which has an amazing record of discovery, playing a key role in various important and famous undersea expeditions. Alvin has been operating for 40 years but can go down only 4, 500 meters (14, 784 feet). It’s about time for an upgrade, WHOI researchers say.
Alvin was launched in 1964. Since then, Alvin has worked between 200 and 250 days a year, says Daniel Fornari, a marine geologist and director of the Deep Ocean Exploration Institute at WHOI. During its lifetime, Alvin has carried some 12, 000 people on a total of more than 3 , 000 dives. A newer, better versions of Alvin is bound to reveal even more surprises about a world that is still full of mysteries, Fornari says. It might also make the job of exploration a little easier. "We take so much for granted on land. " Fornari says. "We can walk around and see with our eyes how big things are. We can see colors, special arrangements. "
Size-wise, the new HOV will be similar to Alvin. It’ll be about 37 feet long. The setting area inside will be a small sphere, about 8 feet wide, like Alvin. It’ll carry a pilot and two passengers. It will be just as maneuverable. In most other ways, it will give passengers more opportunities to enjoy the view, for one thing. Alvin has only three windows, the new vehicle will have five, with more overlap so that the passengers and the pilot can see the same thing.
Alvin can go up and down at a rate of 30 meters every second, and its maximum speed is 2 knots (about 2. 3 miles per hour) , while the new vehicle will be able to ascend and descend at 44 meters per second. It’ll reach speeds of 3 knots, or 3. 5 miles per hour.
What is Alvin?
选项
A、A research institute.
B、A transporting vehicle.
C、A submersible.
D、A scientist.
答案
C
解析
短文第一段的第四、第五句提供了答案。
转载请注明原文地址:https://kaotiyun.com/show/7cLd777K
本试题收录于:
职称英语理工类A级题库职称英语分类
0
职称英语理工类A级
职称英语
相关试题推荐
CigarsInstead?Smokingoneortwocigarsadaydoublestheriskofcancersofthelip,tongue,mouth,andthroat,according
Ifparentsarenotcareful,childrentendtoneglecttheirhomework.
LifetimeemploymentintheJapanesecompanyperhapsmeansthattheemployeecanmakeseriousmistakesinwork.Family’sandcom
Accordingtothepassage,thepurposeofeffectivereadingwithhigherspeedismostlikelytohelpyou______.Accordingtoth
AFactorsLeadingtoEnergyWasteBHomeAppliancesCPropsalstoCutEnergyConsumptionDEnergyConsumptionTestETerawa
ADon’tBeaPerfectionistBTheBenefitsofKnowingWhereWeWanttoGoCHardWorkPlusGoodLuckDTheOutcomesofOurEf
Accordingtothepassage,nothingissocoldtoanordinarypersonas______.Fromthepassagewelearnthat______.
Fewerandfewercreditcardsaremadeofpaper.Greenpeacecardsarewidelyusedinmanyorganizationsnow.
Inthelattercasetheoutcomecanbeseriousindeed.
Herlifeisbecomingmorediverse.
随机试题
Sunlightisfree,butthatisnoreasontowasteit.Yeteventhebestsiliconsolarcells—byfarthemost【C1】________sort—conv
微型计算机结构分为三大部分:CPU、_________和I/O设备。
顾客满意营销
下列不属于咀嚼黏膜描述特征的是
下列有关当事人的表述不正确的是()。
批量证券转托管分为()方式。
美联储不是“一家银行”,而是将50个州和哥伦比亚特区划分为12个联邦储备区,在每个联邦储备区设立一家联邦储备银行和若干分行,与联邦储备委员会,顾问咨询委员会,以及作为会员银行的若干商业银行共同组成的多元中央银行体系。除了联邦储备银行,所有的国民银行(在货币
关于管辖权异议的表述,下列选项错误的是()
Footballis,Isuppose,themostpopulargameinEngland;onehasonlytogotooneoftheimportantmatchestosee.Richandpo
A、Heenjoyedusingit.B、Heleftitinthetaxi.C、Heleftitattheairport.D、Helostitonhistrip.B
最新回复
(
0
)