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
Mighty Flighty A fly can do one thing extremely well: fly. (86) Recently a team of British scientists declared that the comm
Mighty Flighty A fly can do one thing extremely well: fly. (86) Recently a team of British scientists declared that the comm
admin
2019-01-24
77
问题
Mighty Flighty
A fly can do one thing extremely well: fly. (86)
Recently a team of British scientists declared that the common housefly is the most talented aerodynamicist on the planet, superior to any bird, bat, or bee.
A housefly can make six turns a second; hover; fly straight up, down, or backward; do somersaults; land on the ceiling; and perform various other show-off maneuvers. And it has a brain smaller than a sesame seed.
Michael Dickinson, who studies fly flight in his lib at Cahech, says the housefly isn’t actually the best flier. ’Hoverflies are the be-all and end-all,’ he says. (87)
They can hover in one spot, hurtle through the air to another location, and then race back to their original hovering point precisely.
Scientists, engineers, and military researchers want to know how creatures with such small brains can do that. Maybe they could reverse-engineer a fly to make a robotic device that could reconnoiter dangerous places, such as earthquake zones or collapsed mines.
Dickinson’s laboratory works with fruit flies. Researchers put them in chambers and manipulate the visual field, filming the flies in super-slow motion, 6,000 frames a second. Dickinson is interested in knowing how flies avoid collisions. He has found that certain patterns, such as 90-degree turns, are triggered by visual cues and two equilibrium organs on their backs that function like a gyroseope.
Flies have only a dozen muscles for maneuvering, but they’re loaded with sensors. In addition to their compound eyes, which permit panoramic imagery and are excellent at detecting motion, they have wind-sensitive hairs and antennae. They also have three light sensors, called ocelli, on the tops of their heads, which tell them which way is up. Roughly two-thirds of a fly’s entire nervous system is devoted to processing visual images. They take all this sensory data and boil it clown to a few basic commands, such as ’go left’ and ’go right.’
(88)
Imagine if you didn’t utter an opinion until you had read hundreds of books, magazines, newspaper articles, and blogs, and then issued a statement based on a few basic notions. That’s how a fly approaches flying.
Only the fly is a speed reader. The information processing takes a fraction of a second. Researcher Rafal Zbikowski of Cranfield University in Shrivenham, England, calls this mode of operation a ’sensor-rich feedback control paradigm.’
(89)
Given that flies have evolved for hundreds of millions of years (and that they were the first animals to take to the air), we shouldn’t be surprised that they’re such good fliers.
’They just don’t have brains like ours. Studying flies,’ says Dickinson, ’is like traveling to another planet.’
选项
答案
设想,你不发表任何意见,直到读过了数百本书、杂志、报纸文章和博客后才就一些基本观点发表一篇声明。
解析
(utter an opinion发表意见。notion观点,想法。)
转载请注明原文地址:https://www.kaotiyun.com/show/oX8K777K
本试题收录于:
B类竞赛(英语专业本科专科)题库大学生英语竞赛(NECCS)分类
0
B类竞赛(英语专业本科专科)
大学生英语竞赛(NECCS)
相关试题推荐
IfwereadEnglishlanguagenewspapersorlistentonewsreaderswhouseEnglishinalldifferentpartsoftheworld,wewillqui
IfwereadEnglishlanguagenewspapersorlistentonewsreaderswhouseEnglishinalldifferentpartsoftheworld,wewillqui
Oldpeoplearealwayssayingthattheyoungarenotwhattheywere.Thesamecommentismadefromgenerationto【C1】______andit
Researchfindingsshowwespendabouttwohoursdreamingeverynight,nomatterwhatwe_____duringtheday.
White-collarcrime—crimecommittedbypersonsofaffluence,ofteninthecourseoftheirbusinessactivities—includescorporate
TheradicalcauseoftheconflictinNorthernIreland:【D1】______ofIrelandPlantation:Takeplaceinthe【D2】______century.Most
Scientistsclaimthatin50year’stime,therewillbecomputersthat【M1】______arelikelytobeevenmoreintelligentthanhum
世界上的每个城市都有出租车把游客带到有趣的地方。【T1】伦敦是世界上唯一一个游客们乘坐出租车就会有很有趣的经历的城市。(定语从句)部分是因为那在其他国家所没有的特殊的黑色的出租车。这也是因为司机们自身。【T2】英国人因礼貌待人、含蓄保守(reserr
Thereportersexposedthecorruptionofseveralhighofficialsinthegovernment:______,theywereaskedtoresignfromoffice.
ThepainterJacobLawrencefrequentlyincorporatedpatternsintohiscompositions,makingthemmorestrikingthantheywould____
随机试题
阅读《宝玉挨打》中贾政说的两段话,然后回答下列小题。“你们问问他干的勾当,可饶不可饶!素日皆是你们这些人把他酿坏了,到这步田地,还来劝解!明日酿到他弑父弑君,你们才不劝不成?”“倒休提这话!我养了这不肖的孽障,我已不孝;平昔教训他一番,又有众人护持;不
A.癌前病变B.交界性肿瘤C.癌肉瘤D.原位癌E.非肿瘤性病变胃窦部粘膜重度不典型性增生
(2010年)辐射换热过程中能量属性及转换与导热和对流换热过程不同,下列错误的是()。
GIS软件系统通常由系统软件、GIS专业软件和()组成。
人民警察必须以()为活动准则。
7,9,11,15,23,55,()
以HTML和HTTP协议为基础的服务称为______服务。
数据库DB、数据库系统DBS、数据库管理系统DBMS之间的关系是()。
【1】【8】
A、TheWhiteHousewarnedthemnottodonow.B、Thepanelofexpertsobjectedtheproposals.C、NASAdidn’tgetadequatemoney.D、
最新回复
(
0
)