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
45
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.
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
第三段最后两句告诉我们,Alvin只有三个窗户,而HOV有五个。最后一段告诉我们,两艘潜水装置的上下活动速度和行进速度有所差别。所以D是正确选择。
转载请注明原文地址:https://kaotiyun.com/show/pcLd777K
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
NaturalMedicinesSinceearliestdays,humanshaveusedsomekindsofmedicines.Weknowthisbecausehumanshavesurvived.
HypertensionDrugsFoundtoCutRiskofStrokeAustraliandoctorsdeclaredMondaythatacocktailofsimpleantihypertensive
MyLifeatRendaIlearnedveryquicklythatbeingateachingassistant(TA)attheUniversityofIowawouldbedifferentfrom
ABiologicalClockEverylivingthinghaswhatscientistscallabiologicalclockthatcontrolsbehavior.Thebiologicalclo
AdaptationofLivingThingsCertainanimalsandplantsdevelopcharacteristicsthathelpthemcopewiththeirenvironmentbe
PeoplefrommanycountriesweredrawntotheUnitedStatesbythegrowingcitiesandindustries.
FasterEffectiveReadingAhigherreadingrate,withnolossofcomprehension,willhelpyouinothersubjectsaswellasinEng
ThePriceofIdleness1.ElectricaldevicessuchasCDplayers,vidoesandburglaralarmsareconsumingmoreenergyinstandbymo
HowDidSheConquertheAmericans?African-AmericantalkshowqueenOprahWinfreyistheworld’smostpowerfulcelebrity,acc
随机试题
一平面简谱横波的波动表达式为y=0.05cos(20πt+4πx)(SI),取k=0,±1,±2,…。则t=0.5s时各波峰所在处的位置为()。
属于施工总承包管理模式在合同控制方面的特点的有()。
对绩效表现好坏的衡量涉及比较基准的选择问题,采用不同的比较基准结论常常会相同()
建设单位选聘物业管理企业的,应当在()之前与物业管理企业办理物业承接查验手续,并将承接查验记录作为物业管理档案。
结构式家庭治疗模式治疗技巧中,协助家庭成员挑战家庭的病态结构,改变家庭的权力运作方式,打破原来病态家庭结构的平衡属于()
在工伤事故分类中,按照事故类别可以划分为()类别。
乡间读书过个年一近年关.苍茫的岁末时分总是格外地撩动着城里游子的心境。一时间周围总像有声音在急不可待地催促我踏上归家的行程,收拾好行李,常常丢三落四地忘却家人嘱咐携带的东西,却总忘不了整理好几册自己要读的书。说真的,再也没有比过年时到乡间,
遵纪守法是要求公民遵守()。
若有以下程序#include<stdio.h>main(){inta=-11,b=10;a/=b/=-4;printf("%d%d\n",a,b);}则程序的输出结果是
窗体上添加有3个命令按钮,分别命名为Commandl、Command2和Command3,编写Commandl的单击事件过程,完成的功能为:当单击按钮Command1时,按钮Command2可用,按钮Command3不可见。以下正确的是
最新回复
(
0
)