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
Scientists have determined that Archaeopteryx, the earliest known bird, was definitely birdbrained, meaning no disrespect. Indee
Scientists have determined that Archaeopteryx, the earliest known bird, was definitely birdbrained, meaning no disrespect. Indee
admin
2014-05-14
56
问题
Scientists have determined that Archaeopteryx, the earliest known bird, was definitely birdbrained, meaning no disrespect. Indeed, they consider the fossil’s brain size decisive evidence that Archaeopteryx had what it took to fly.
The new research suggests, moreover, mat birds probably started flying millions of years earlier than scientists previously thought. It is just mat fossils of those first flying birds—predecessors of Archaeopteryx—have never been found.
The researchers, at the Natural History Museum in London, based their findings on the first X-ray examination and reconstruction of the braincase and inner ear of a 147-million-year-old Archaeopteryx specimen.
They found that in size, shape and volume, its brain was similar to that of the modern eagle or sparrow.
Measurements of the semicircular canals, the mechanism for balance inside the ear, showed that Archaeopteryx had the "neurological and structural adaptations necessary for flight," the scientists concluded.
Their research, involving an X-ray computed tomography scan, or C.T., of the fossil’s braincase and inner ear, is described today in the journal Nature.
Previous studies of the feathered wing and tail of Archaeopteryx and its birdlike anatomy, including a pronounced wishbone, supported the prevailing view of experts that it was capable of some degree of powered flight. Archaeopteryx is considered a prime transitional species in the evolution of some reptiles, probably dinosaurs, into today’s birds.
But the research team, led by Dr. Angela Milner, a paleontologist at the British museum, wrote that until their investigation of Archaeopteryx, "little was understood about the extent to which its brain and special senses were adapted for flight."
Dr. Milner said the new study not only established that Archaeopteryx was capable of "controlling the complex business of flying," but also showed "how much there is still to discover about when and how bird flight began."
In a statement issued by the museum, Dr. Milner said, "If flight was this advanced by the time Archaeopteryx was around, then were birds actually flying millions of years earlier than we’d previously thought?"
The author’s attitude towards the new research is
选项
A、supporting.
B、neutral.
C、negative.
D、critical.
答案
B
解析
纵观全文,作者都在客观地陈述事实,没有添加任何个人感情色彩。所以,正确答案为B“中立的”。
转载请注明原文地址:https://kaotiyun.com/show/42TK777K
0
专业英语四级
相关试题推荐
Mostpeoplewhotravellongdistancescomplainofjetlag.Jetlagmakesbusinesstravelerslessproductiveandmoreprone(1)_____
Theworldisthrowingawayashockingamountoffood.Areport(1)_____thatatleastathirdofthe4billiontonnesoffoodthe
Whenshopkeeperswanttolurecustomersintobuyingaparticularproduct,theytypicallyofferitatadiscount.Accordingtoa
Summerisanidealtimeforjuniorstogetthejumponcollegeadmissionsessay.Theselesshurriedmonthsbeforethecomingof
InternetdatashowsthatAmericanyoungeradultshavebecometheprimarygroupmadaboutalteringtheirpersonalappearance.Onc
Wherecanpeopletakeadulteducationcourses?
WriteonANSWERSHEETTHREEanoteofabout50-60wordsbasedonthefollowingsituation:YoupromisedtohelpJennybuyab
Undernocircumstances______temporaryeconomicdevelopmentattheexpenseoftheenvironmentandresources.
Springishere:flowersareinbloom,birdsongfillstheair,andtheinboxesofemployersarefilledwithdesperateappealsfor
Springishere:flowersareinbloom,birdsongfillstheair,andtheinboxesofemployersarefilledwithdesperateappealsfor
随机试题
A.乙醇B.二氯二氟甲烷C.聚山梨酯D.维生素CE.盐酸异丙肾上腺素在盐酸异丙肾上腺素气雾剂中:可作为气雾剂中抛射剂的是()。
试述人民检察院依法对刑事诉讼实行法律监督的具体内容。(中国青年政治学院2010年研)
新鲜脱位是指未满
下列选项中,不属于调整项目进度计划时,采用的进度调整措施包括()。
围护结构热桥部分的温度值如果()的露点温度,会造成表面结露。
某水电工程,监理公司承担施工阶段监理任务,建设单位采用公开招标方式选定承包单位。在招标文件中对省内与省外投标人提出了不同的资格要求,并规定2007年10月30日为投标截止时间。甲、乙等多家承包单位参加投标,乙承包单位11月15日方提交投标保证金。11月3日
电视业的崛起,导致了电影业的衰退,这属于( )。
近年来,中国出台多项政策增强非公有制经济和小微企业的活力和竞争力。保护民间投资合法利益。国家重视非公有制经济发展,是因为:
Writeanessaybasedonthefollowingchart.Inyourwriting,youshould1)interpretthechart,and2)giveyourcomments.Yoush
WriteonANSWERSHEETTHREEanoteofaboutSO~60wordsbasedonthefollowingsituation:YourfriendMikeinvitesyoutoatte
最新回复
(
0
)