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
57
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.
In what aspects are the new HOV and Alvin different?
选项
A、Offering better views.
B、Speed.
C、Size.
D、Both A and B
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/cXmd777K
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
Readthefollowingmagazinearticleandanswerquestions9-18onthenextpage.TheBurdenofThirst1.AylitoBinayo’sf
Lindawantstochangeacassettebecauseshedislikesit.Lindaishappywithhercassetteplayer.
Archaeological.Archaeologicalstudycoversanextremelylongspanoftimeandagreatvarietyofsubjects.Theearliestsubj
Whenshewasinvitedtotheparty,shereadilyaccepted.
MyExperienceaboutEnglishOnesummernight,onmywayhomefromworkIdecidedtoseeamovie.Iknewthetheatrewouldbeair
HealthInsurance(保险)MostAmericansareresponsiblefortheirownmedicalcosts.Thesecanbeextremelyhighifapersonge
HealthInsurance(保险)MostAmericansareresponsiblefortheirownmedicalcosts.Thesecanbeextremelyhighifapersonge
ItiscommonlyacceptedinAmericansocietythattoomuchsleepis______.Thesecondsentenceofthelastparagraphtellsust
Didyoudothattoirritateher?
Thepriceofvegetablesvariesaccordingtotheweather.
随机试题
A.渗透性利尿B.增加血容量C.两者均有D.两者均无中分子右旋糖酐
易风化饮片有()。
在银团贷款中,()应按照相关要求,对借款人或贷款项目进行贷前尽职调查。
根据《代理记账管理暂行办法》的规定,下列各项中,属于记账机构可以接受委托,代表委托人办理的业务有( )。
法律部门的划分原则中,在判断某一法律、法规应当归入何种部门时应当考虑这一法律、法规的主导因素是什么,按照主导因素进行划分和归类。该原则是()
下列统计函数中不能忽略空值(NuLL)的是()。
Goodmorning,andhereistheweatherreportfortodayandtomorrow.It’scloudyinthemorningandit’llbeclearandfinethis
Withthepossibleexceptionofequalrights,perhapsthemost【1】issueacrosstheUnitedStatestodayisthedeathpenalty.Many
Itis,everyoneagrees,ahugetaskthatthechildperformswhenhelearnstospeak,andthefactthathedoessoinsuch(1)___
Inanattempttoimprovetheoverallperformanceofclericalworkers,manycompanieshaveintroducedcomputerizedperformancemo
最新回复
(
0
)