首页
登录
职称英语
Hitherto, there is no evidence yet that would definitively prove whet
Hitherto, there is no evidence yet that would definitively prove whet
游客
2025-02-22
25
管理
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. [br] 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://tihaiku.com/zcyy/3968232.html
相关试题推荐
Hitherto,thereisnoevidenceyetthatwoulddefinitivelyprovewhet
Scientistsresearchinghypnosishaveuncoveredevidencethatcounte
Scientistsresearchinghypnosishaveuncoveredevidencethatcounte
Scientistsresearchinghypnosishaveuncoveredevidencethatcounte
Scientistsresearchinghypnosishaveuncoveredevidencethatcounte
Scientistsresearchinghypnosishaveuncoveredevidencethatcounte
FALLACY:A、sustainingevidenceB、believabletheoryC、legitimateanalysisD、absolu
RoyalgarmentsfoundinthetombsofancientEgyptiansrevealnoevidenceofhav
Thetheoryis(i)______somuch(ii)______evidencethatitisnowacceptedbythe
Citingirrefutableevidenceofcorruption,theinvestigatingcommittee(i)_____
随机试题
Theresearchersfoundtheageatwhichyoungpeoplefirstfall______tobulliess
Changesinthetechnologyofcommunicationareoccurringsorapidlythatwe
Thedestructionofournaturalresourcesandcontaminationofourfoodsupp
A.10V B.14V C.2V D.
血友病A、B分别缺乏以下凝血因子A.Ⅷ、Ⅸ B.Ⅷ、Ⅺ C.Ⅲ、Ⅴ D.Ⅳ
共用题干 某企业20×9年销售收入为20万元,毛利率为40%,赊销比例为80%
下列关于七氟丙烷灭火系统灭火浸渍时间的说法,错误的是()。A.木材、纸张、织物
投标人在投标过程中不得( )。A.相互串通投标 B.以低于成本的报价竞标
下列各项中,属于物权法律制度上的“物”的是()。A.张某嘴里的假牙 B.太阳
根据《水电水利工程施工监理规范》DL/T5111-2012,工程项目划分及开工申
最新回复
(
0
)