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
Cells cannot remain alive outside certain limits of temperature and much narrower limits mark the boundaries of effective func
Cells cannot remain alive outside certain limits of temperature and much narrower limits mark the boundaries of effective func
admin
2017-04-23
51
问题
Cells cannot remain alive outside certain limits of
temperature and much narrower limits mark the boundaries of
effective functioning. Enzyme systems of mammals and birds are
most efficient only with a narrow range around 37℃; a departure【M1】______
of a few degrees from this value serious impairs their functioning.【M2】______
Even though cells can survive wider fluctuations the integrated
actions of bodily systems are impaired. Other animals have a wide【M3】______
tolerance for changes of bodily temperature.
For century it has been recognized that mammals and birds【M4】______
differ other animals in the way they regulate body temperature.【M5】______
Ways of characterizing the difference have become more accurate
and meaningful over time, but popular terminology still reflects an【M6】______
old division into " warm-blooded" and " cold-blooded" species;
warm-blooded included mammals and birds whereas all other
creatures were considered cold-blooded. As more species were
studied, it became evident that this classification was adequate. A【M7】______
cold-blooded fence lizard usually has a body temperature only a
degree or two below those of humans and so is not cold. Therefore【M8】______
the next distinction was taken between animals that maintain a【M9】______
constant body temperature, called homeotherms, and those whose
body temperature varies with their environments, called
poikilotherms. But this classification was also proved inadequate,【M10】______
because among mammals there are many that vary their body
temperatures during hibernation. Furthermore, many invertebrates
that live in the depths of the ocean never experience change in the
depths of the ocean, and their body temperatures remain constant.
【M6】
选项
答案
an—the
解析
词汇错误。此处是特指过去对动物的一种划分方法,即把动物划分为暖血动物和冷血动物,故应用定冠词。
转载请注明原文地址:https://kaotiyun.com/show/FgzK777K
0
专业英语八级
相关试题推荐
Inwhichkindofconversationstyledopeopletaketurnstogiveopinions?
Inwhichkindofconversationstyledopeopletaketurnstogiveopinions?
HowmanypeoplehavebeenkilledinthefightinginSyria?
TeachingMethodsforEffectiveCommunicationI.Introduction:someteachingapproacheshelpfultoclassroomcommunication—we
QuestioningTechniques—AskingQuestionsEffectivelyI.Successfulcommunications:askingtherigh
SurvivalofEnglishLanguageI.Introduction—Englishwidespreadinthe21stcentury—【B1】______show(s)howEnglishsurvived【B1
Accordingtothenewsitem,arapecaseinOhioledtonationaloutragebecause______.
TheJapanesesaytheysufferfromaneconomicdiseasecalled"structuralpessimism".Overseastoo,thereisatendencytoseeJ
WhichofthefollowingdoesNOTbelongtothewomanwritersofthe20thcentury?
Thestrategiesemployedbylearnersintheplanning,supervisionandevaluationoftheirstudyisdefinedas
随机试题
β2受体
平滑或软组织算法不用于显示
A.黏液血便B.大便的次数和便血程度C.腹痛程度D.腹胀E.肠外表现溃疡性结肠炎活动期的重要表现是
患者低热,午后热甚,胸闷脘痞,不思饮食,渴不欲饮,呕恶,大便稀薄,舌苔黄腻,脉濡数。其证候是
A.三拗汤B.都气丸C.大青龙汤D.麻杏石甘汤合苏葶丸E.小青龙汤合三子养亲汤治疗热性哮喘的首选方剂是
卡介苗预防接种,进针角度为
脑灌注压是指
下列各项中,关于交易性金融资产表述不正确的是()。(2012年改编)
Hedidn’tfeellike______,sohetookataxi.
MostscholarsagreethatIsaacNewton,whileformulatingthelawsofforceandgravityandinventingthecalculusinthelate16
最新回复
(
0
)