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
Locusts, which can consume their own weight in food each day, have a large neuron called the locust giant movement detector(LGMD
Locusts, which can consume their own weight in food each day, have a large neuron called the locust giant movement detector(LGMD
admin
2014-01-07
30
问题
Locusts, which can consume their own weight in food each day, have a large neuron called the locust giant movement detector(LGMD)located behind their eyes. The LGMD releases bursts of energy whenever a locust is on a collision course with another locust or a predatory bird.
A few years ago Rind and her colleagues studied the activity of the LGMD as locusts watched action scenes from the movie Star Wars. The team found that the LGMD releases more energy when something is coming directly at the locust.
These spikes of energy, called action potentials, prompt the locusts to take evasive action. The entire process from motion detection to reaction takes about 45 milliseconds—or 45 thousandths of a second.
"Locusts, like most insects, can see many more images per second than we do. This means they can react in time to things that are approaching very rapidly and so make their escape before collision," Rind said.
The locusts’ ability to see many more images per second than humans gives them a remarkable view of the world. For humans, it would be like watching everything go by in slow motion; Rind added.
And because the insects only detect things that are on a collision course with them, the locusts are ignorant of all other movements. It’s a particularly useful trait, as the locusts travel in dense swarms akin to rush hour traffic.
"The LGMD system is complemented by the brain of the locust, which provides the necessary experience and knowledge to really react according to the situation," said Jorge Cuadri, a project engineer with Spain’s National Centre of Microelectronics. Cuadri is helping to develop the circuitry(电路装置)for the locust-inspired crash avoidance technology.
Cuadri and his colleagues are responsible for adapting the locust collision-avoidance system to the automotive environment.
Their adapted system is based on a single, integrated step that combines visual optics and electronics. The conventional way of doing this would involve two steps: First, a camera would capture the image. Second, a digital processor would analyze it.
The two-step approach, which uses radar images, is expensive and currently limited only to luxury cars, Rind said.
What would immediately happen if human beings were endowed with the power to see a good many images in quite a short instant?
选项
A、Every movement would become so easily observable that it is just like in slow motion.
B、Human beings would be ignorant of all other movements except things that are on a crash route with them.
C、Everything around would pass by at a lower speed.
D、Human beings would be very sensitive to those cars that are about to bump.
答案
A
解析
题干中的假设与蝗虫具有的能力一致(蝗虫每秒钟看到的图像比人类要多许多),第5段最后一句说到,蝗虫的这种能力在人类身上(For humans...),就好比我们在看慢镜头一样,故A正确。
转载请注明原文地址:https://kaotiyun.com/show/5CFK777K
0
专业英语四级
相关试题推荐
AlthoughAnneishappywithhersuccess,shewonders______willhappentoherprivatelife.
PoetryMonthintheUnitedStatesAprilisNationalPoetryMonthintheUnitedStates./Thisyearisthefifteenthcelebrat
InAmerica,thetraditionaltimeforgraduationsis______.
Withinthatexclusivegroupofliterarycharacterswhohavesurvivedthroughthecenturies—fromHamlettoHuckleberryFinn—fewc
Whilethoseearningmaster’s,doctoral,orprofessionaldegreesstillearnmoreduringtheircareersthanthosewithlesseducat
Theprocessbymeansofwhichhumanbeingscanarbitrarilymakecertainthingsstandforotherthingsmaybecalledthesymbolic
Theprocessbymeansofwhichhumanbeingscanarbitrarilymakecertainthingsstandforotherthingsmaybecalledthesymbolic
Fromheat-hazeandsummersmogtooutsizehailstonesandflashfloods:moretopsyturvyweatherisontheway,Britain’sforecast
Althoughhemadeabigfortuneinthelottery,heisstillvery______ofhismoney.
随机试题
老师利用操作线绳形成的不同图案,引导幼儿发挥想象并锻炼语言表达能力,孩子们思维活跃,讨论热烈。但真轮到分组操作、练习时,孩子们的表达愿望似乎已没有那么强烈,有的甚至开始走神儿、打打闹闹。你认为这是为什么?还有什么建议吗?
裴斯泰洛齐重视慈善教育和普通教育,为此,他被誉为“___________”。
张某和刘某夫妇无子女,后收养李某的幼子为养子。该养子必须()。
A.抑制细胞蛋白质的合成B.封闭抑制性神经元,导致肌肉痉挛C.阻断乙酰胆碱的释放D.激活腺苷酸环化酶,使胞内cAMP上升,促进肠黏膜分泌功能增强E.刺激呕吐中枢及肠壁,导致呕吐和腹泻
下列各项中属于安全使用会计软件的有()。
为进一步实施“民意主导警务”战略,优化执法服务,某县公安局打算开展一次人民群众满意度调查活动,真实了解群众对公安工作及队伍建设的满意程度,查找公安机关执法服务中存在的不足,逐项落实整改措施。要确保群众反映的问题得到及时有效整改,需要建立健全回访整改工作
目前市场上的汽油有90、93、95、97等标号,这些标号代表的意思是()。
设α1,α2,…,αm,β1,β2,…,βn线性无关.而向量组α1,α2…,αm,γ线性相关.证明:向量γ可由向量组α1,α2…,αm,β1,β2,…,βn线性表示.
【T1】Fathersexposedtopoisonoussubstancesareprobablyjustaslikelytobethecauseofdefectsintheirunborninfantsasmo
AretheBritishpeopleEuropeans?ThismayseemastrangequestiontoAfricansandAsians,whotendtothinkofallwhitemenas
最新回复
(
0
)