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
For scientists who study human evolution, fossil remains provide the only direct evidence of our ancient ancestors. Access to th
For scientists who study human evolution, fossil remains provide the only direct evidence of our ancient ancestors. Access to th
admin
2012-10-23
113
问题
For scientists who study human evolution, fossil remains provide the only direct evidence of our ancient ancestors. Access to these paleoanthropological Rosetta stones, how- ever, is limited by protective curators who are often reluctant to lend the fragile fossils. And in the case of fossil skulls, nature preserves critical information in the largely in- accessible interior. But help is on the way. At the annual meeting of the American Association of Physical Anthropologists in Salt Lake City this past April, researchers discussed how medical imaging, virtual reality and computer-controlled modelling technologies get around these obstacles noninvasively.
Three-dimensional medical imaging based on computed tomography (CT) scans was developed in the early 1980s. On a computer, surgeons could electronically remove the patient’s soft tissue and then explore the virtual skull inside and out before operating. It wasn’t long before Glenn Conroy of Washington University and his colleagues demonstrated that these same techniques could also be applied to fossils, in which sediments take the place of soft tissue.
With advances in computer graphics and computational power, paleoanthropologists can now perform on their computers a wide range of investigations that are impossible to attempt on the original fossil. Missing features on one Side of the skull can be re-created by mirroring the preserved features (postmortem deformations can be similarly rectified) and tiny, hidden structures such as the inner ear can be magnified for closer examination. Moreover, as Christoph P. E. Zollikofer and Marcias Ponce de Leon of the University of Zurich and others have shown, anthropologists can reconstruct fragmented fossils on-screen.
The standard repertoire of measurements can also be made virtually, in most cases with the same degree of accuracy afforded by handheld calipers. And with the creation of a virtual "endocast", brain volume can be determined reliably. In fact, Conroy’s recent re- Search has revealed a major discrepancy between the estimated and actual brain volume of an early hominid called Stw 505 (or Mr. Pies). Conroy suspects that the estimated cranial capacity of some other fossils might also be incorrect--a hunch that, if substantiated, could have important implications for our understanding of brain evolution.
Why virtual reality and other technology are used in studying human evolution?
选项
A、Researchers discussed them and decided to develop these technologies in research.
B、Internet is widely used and the need for communicating via computers is becoming urgent.
C、Limited access to original stones and hidden information in inaccessible interior made it necessary.
D、It will be cheaper and more convenient.
答案
C
解析
见原文第一段。B和D是主观臆测,原文中并未提及;A项是原文内容,但是结果,原因仍是C。
转载请注明原文地址:https://kaotiyun.com/show/OW9O777K
0
考博英语
相关试题推荐
BenjaminDaywasonly22yearsoldwhenhedevelopedtheideaofanewspaperforthemassesandlaunchedhisNewYorkSunin183
NicholasChauvin,aFrenchsoldier,airedhisvenerationofNapoleonBonaparteso______andunceasinglythathebecamethelaug
Someweeksago,ridinginacabfromBostontoCambridge,mydriverturnedandaskedmewhatIdidforaliving."TeachEnglish,
TheTacoma’sexecutivedirectorandthreeportcommissionerswillbeinChinanextweekto______advicefromworldportexperts
Theygreetedhisproposalwith______andrefusedtogiveitseriousstudy.
Theinstinctivefoundationoftheintellectuallifeiscuriosity,whichisfoundamonganimalsinitselementaryform.Intellige
Earlysignsof______seenintheherbalmedicinestudyareextremelyencouragingandbaseduponthesedata,wearenowplanning
"Humanism"hasusedtomeantoomanythingstobeaverysatisfactoryterm.57.Nevertheless,andinthelackofabetterword,
Thecritic’sassessmentofthebookisthatitisbeautifullywritten.
Mykneeswereshaking.I【41】afraid【42】withthem,【43】I【44】myselfoutonthepathtofollowthem.Amara’shusband【45】comingbacka
随机试题
得出两总体的样本数据如下:甲(33,18,40,50,54,30,39);乙(48,17,24,22,38)。在秩和检验中,秩和是()
肺下界上升见于平静呼吸时正常肺下界位于肩胛线
营养不良早期诊断的可靠指标是
中国籍人李红出国多年后定居甲国(但并未入甲国籍),后与甲国一男子结婚并生一女,取名希瑞。李红同江苏老家省亲,住在其亲属家。甲国称李红在甲国参与毒品交易等犯罪活动,向中国提出了引渡的要求,两国之间无引渡条约。依中国《国籍法》、《出境入境管理法》、《引渡法》及
在进行桥梁承载能力检测评定时,有关作用及其组合在无特殊情况要求时,宜采用设汁荷载标准。()
通过期货交易形成的价格具有( )的特点。
适合于建立费用中心进行成本控制的单位是()。
法的社会作用中,执行社会公共事务的作用仅对统治阶级是有利的。()
1972年联合国教科文组织出版了(),从此终身教育在整个世界,尤其是发达国家,成为改革成人教育和学校教育并使之一体化的基本指导理论
Whomostlikelyisthespeakeraddressing?
最新回复
(
0
)