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
95
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.
What is Alvin?
选项
A、A research institute.
B、A transporting vehicle.
C、A submersible.
D、A scientist.
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/lXmd777K
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
Youwillhearfivepeoplegivingreasonswhychildrenlearntheirmothertonguesowell.Beforeyoulisten,readthelistof
Lookatthetenstatementsforthispart.Youwillhearastoryabout"CommunicationThroughTime".Decidewhetheryou
Lookatthetenstatementsforthispart.Youwillhearastoryabout"CommunicationThroughTime".Decidewhetheryou
Youwillhearfivepeoplegivingtheiropinionsonspankingchildren.Forquestions9-13,choosefromthelistA-Fwhateac
Youwillhearfivepeoplegivingtheiropinionsonspankingchildren.Forquestions9-13,choosefromthelistA-Fwhateac
CONVERSATION2(Questions5-8)MESSAGEProblem:Therewasa【L5】______problem.Mr.Franks’companyha
Thenextmorningshetoldusthatthelastquestiondidn’tdeparttillwellaftermidnight.
Don’tirritateher.she’sonashortfusetoday.
Theroomwasfurnishedwiththesimplestessentials,abed,achair,andatable.
8.Don’tirritateher,she’sonashortfusetoday.
随机试题
《短歌行》中“周公吐哺”的“周公”指()
患者,女,58岁。因煤气中毒1天后入院。患者处于浅昏迷状态、脉搏130次/分、皮肤多汗、面色潮红、口唇呈樱桃红色。护士应给予吸氧。氧流量是
以下哪项不属于肺间质的组成
A、不溶性杂质B、遇硫酸易碳化的杂质C、水分及其他挥发性物质D、有色杂质E、硫酸盐杂质溶液颜色检查法是检查( )。
某工业企业2018年度全年销售收入为1000万元,转让无形资产所有权收入100万元,提供加工劳务收入150万元,变卖固定资产收入30万元,视同销售收入500万元,当年发生业务招待费12万元,则该企业2018年度所得税前可以扣除的业务招待费用为(
某企业2000年度共计拥有土地65000平方米,其中子弟学校占地3000平方米、幼儿园占地1200平方米、企业内部绿化占地2000平方米。2000年度的上半年企业共有房产原值4000万元,7月1日起企业将原值200万元、占地面积400平方米的一栋仓库出租给
管理可以分为很多种类的管理,人力资源管理、财务管理、生产管理属于()。
教师的职业素养包括_______、_______、_______、_______。
新民主主义革命时期,党内犯“左”倾错误的人和犯右倾错误的人分别提出“毕其功于一役”和“二次革命论”,这两种错误倾向实质是
ThewarmingoftheArcticisreleasinganewwaveofbannedtoxicchemicalsthathadbeentrappedintheiceandcoldwater,sci
最新回复
(
0
)