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
2016-02-23
55
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/qKKO777K
0
专业英语八级
相关试题推荐
AccordingtoNigel,mostproblemsofairtravelarecausedby______.
Allofuswillworkinourjobswithdifferentkindsofpeopleandwehavetopossesscertaincharacteristicstokeepongoodte
AreWeReadytoOpen?Emailhasthepotentialasacost-efficientandeffectivemarketingstream.Touseitanduseit
ManyAmericansfindsilenceuncomfortableduringabuffetoraformaldinner.SointheStatesthereisawidespreadpracticeof
AccordingtothenewFrontlineHealthWorkersCoalition,traininghealthcareworkerscan
Therearemorethan300millionofusintheUnitedStates,andsometimesitseemslikewe’reallfriendsonFacebook.Butthes
AzharUsman,astand-upcomic,saysheisa"verypatriotic"AmericanMuslim."Iwoulddieforthiscountry,"hedeclares.After
______describesindetailacommunistsociety.
ThegrammaticalcategoryreflectedinI/me,he/him,she/heriscalled______.
PASSAGEFOURAccordingtothepassage,whichpalaeontologicaldoctrinehavethescientistsshownnodoubtatall?
随机试题
顾步汤适用的脱疽证候是
男性,50岁,烧伤患者,烧伤总面积35%,其中Ⅲ度烧伤面积10%。该患者属于烧伤的类型为
工程项目施工质量工作计划主要包括()。
[背景资料]某水泥厂生活区建设项目包括一栋三层食堂和会议室、六层宿舍楼。食堂和会议室的建筑面积为1872.2平方米,宿舍的建筑面积为1450平方米。食堂会议室楼为现浇混凝土框架结构,按6度抗震设防,抗震等级为4级。工程采用天然地基,根据地质勘探资料,
(2014年真题)下列古典名曲与王维的送别诗有关的是()。
容易犯错误是我们人类无法避免的一个弱点,不管科技发展到什么程度,事故总是会在不经意间发生。懂得这个道理,我们就可以“_______”,只有这样,或许我们才能_______应对一切可能出现的麻烦。填入划横线部分最恰当的一项是:
社会医学是指从社会的角度研究与人群的生、老、病、死有关的医学问题,研究社会因素在生命的准备、保护和提高生命质量等不同阶段发挥的综合作用,为医疗卫生事业的管理提供理论依据,为保障人群健康制定相应的卫生目标、政策、策略与措施。根据上述定义,下列不属于社会医学研
《合同法》第51条规定,无处分权的人处分他人财产,经权利人追认或者无处分权的人订立合同后取得处分权的,该合同有效。这一规定属于法律构成要素中的()。
设A,B同时发生,则C发生.证明:P(C)≥P(A)+P(B)-1.
已知矩阵只有一个线性无关的特征向量,那么矩阵A的特征向量是__________.
最新回复
(
0
)