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
Hitherto, there is no evidence yet that would definitively prove whether or not some dinosaurs were warm-blooded, but sci
Hitherto, there is no evidence yet that would definitively prove whether or not some dinosaurs were warm-blooded, but sci
admin
2011-01-17
14
问题
Hitherto, there is no evidence yet that would definitively prove whether or
not some dinosaurs were warm-blooded, but scientists have begun to investigate
oxygen isotopic abundances in the annual growth bands of teeth or bones of high
Line latitude, hence seasonally influenced, terrestrial dinosaurs. The ratio of oxygen
(5) isotopes depends on temperature, and an absence of seasonal variations in
oxygen 18—a heavy version of the common oxygen 16 atom-would strongly
suggest that the animals maintained a constant internal temperatures. Such a
finding would not, however, constitute "proof" that dinosaurs were warm
blooded, as there are external mechanisms that cold-blooded animals employ to
(10) regulate body temperatures and thereby influence metabolic rates. More
nettlesome is that proof would have to come from discovery of intact dinosaur
remains in which the soft tissue had not been replaced or altered, and from
which the biomolecules responsible for thermoregulation could be extracted,
identified and characterized. Such a proof is unlikely, as it would require an
(15) almost impossible level of preservation over 65 million years, plus the advent of
biotechnology that does not yet exist.
The author’s primary purpose is to
选项
A、answer a theoretical question in the field of dinosaur thermoregulation
B、discuss the current state of research in the field of dinosaur thermoregulation
C、resolve a dispute in the field of dinosaur thermoregulation research
D、predict a future crisis in the field of dinosaur thermoregulation research
E、suggest some of the possible benefits of a technique in dinosaur thermoregulation research
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/l2jO777K
本试题收录于:
GRE VERBAL题库GRE分类
0
GRE VERBAL
GRE
相关试题推荐
Scientistssaidtheyhavefoundevidenceofagiantplanetfaroutinoursolarsystem.Inastatement,theCaliforniaInstitute
NocountryintheworldhasmoredailynewspapersthantheUSA.Therearealmost2,000ofthem,ascomparedwith180inJapan,
NocountryintheworldhasmoredailynewspapersthantheUSA.Therearealmost2,000ofthem,ascomparedwith180inJapan,
Thepresidentspokeatthebusinessmeetingfornearlyanhourwithout______hisnotes.
Martin,whenyougotothemeetingtomorrow,______youriPadwithyou.
Itisn’tquite______thathewillbepresentatmeeting.
Themeetingwillbeginat9:00accordingtothe______.
BUMPER:DAMAGING::
Whiletributyltin(TBT)isgenerallynotas(i)______ascertainothertoxicsubstances,studiesofdamagingeffectsonmarineli
Unfortunately,hisdamagingattacksontheramificationsoftheeconomicpolicyhavebeen____byhiswholeheartedacceptanceof
随机试题
系统误差决定检验结果的精密度。
简述阿Q的思想性格特征。
Hediscoveredfromthetimetablethatthetrainwas【56】intwentyminutes.Edgersettledhimselfintoacomer,worried【57】whenpe
有关黄疸的病治,以下哪些正确
A.正气未伤,精气未衰B.正气不足,神气不旺C.精亏气损神衰D.精充气足神旺E.阴阳离决的危候失神的临床意义是
()是指发包人在招标文件中规定的要求承包人提交的保证、履行合同义务的担保。
下列哪些行为属于违法行为:
“主张把一切知识教授给一切人和教育要适应自然,提出了统一的学制系统以及新颖的教学原则、教学方法。”后来人们将其简称为泛智教育,泛智教育是()提出的。
Globalwarmingisalreadycuttingsubstantiallyintopotentialcropyieldsinsomecountries—tosuchanextentthatitmaybea
WhattimeisMike’swife’sappointment?
最新回复
(
0
)