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
2013-10-25
93
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 Holel 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.
".. . a world that is still full of mysteries" refers to
选项
A、the earth.
B、out space.
C、the ocean.
D、Mars.
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/vXmd777K
本试题收录于:
职称英语卫生类B级题库职称英语分类
0
职称英语卫生类B级
职称英语
相关试题推荐
IDCardForanewstudent,theIDcardwillbemailedtohis/hermailingaddressapproximately【L5】______workingdaysafterh
Lookatthetenstatementsforthispart.Youwillhearastoryabout"CommunicationThroughTime".Decidewhetheryou
Lookatthetenstatementsforthispart.Youwillhearastoryabout"CommunicationThroughTime".Decidewhetheryou
CONVERSATION2(Questions5-8)MESSAGEProblem:Therewasa【L5】______problem.Mr.Franks’companyha
CONVERSATION2(Questions5-8)Fred’sjob:【L5】______driver.Yearsfordoingthejob:【L6】______.ProblemsFredhad:troublewith
Beforehisretirement,Brianworkedasapilotforacompanycalled(9)______foralongtime.Brianfeelslikeabirdwhenfl
AAddressingaVarietyofBehavior-affectingFactorsBImportanceofImmunizationCRelationshipwithOtherHealthServicesD
Coldsarecausedbyexposuretosevereweather.Coldsarecausedbyviruseshideninthebody.
AssoonasLindawentintothedepartmentthatsoldraincoats,shesensedtherewassomethingunusualintheatmosphere.Fir
随机试题
生产要素主要包括()
引起Ⅰ型呼吸衰竭的常见病因是
氰化物中毒时皮肤黏膜呈樱红色的原因是
某一级公路施工项目开工里程126km。建设单位通过公开招标方式选定某监理单位承担该项目的施工监理任务。在签订监理合同及监理工作准备过程中发生如下事件:事件1:在监理中标通知书发出后的第35天,招标人与中标人签订了施工监理合同。随后双方又
下列内容中,属于施工图预算重点抽资法审查重点的是()。
勘测设计、施工、系统集成、用户管线建设、监理等单位有()行为的,工业和信息化部或省、自治区、直辖市通信管理局应责令其改正,并依据《建设工程质量管理条例》予以处罚。
根据《仲裁法》规定,仲裁协议独立存在,下列各项中,不影响仲裁协议效力的有()。
我国《未成年人保护法》规定了保护少年儿童健康发展的哪几种保护?()
研究人员把受试者分成两组:A组做十分钟自己的事情,但不从事会导致说谎行为的事;B组被要求偷拿考卷,并且在测试时说谎。之后,研究人员让受试者戴上特制电极,以记录被询问的眨眼频率。结果发现,A组眨眼频率会微微上升,但B组的眨眼频率先是下降,然后大幅上升至一般频
PublicRelationsPublicrelationsisabroadsetofplannedcommunicationsaboutthecompany,includingpublicityreleases,
最新回复
(
0
)