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
96
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
LosAngelescabinet-makerEdwardStewartmaybeamodernDr.Frankenstein.In1959,heclaims,herestoredadeadfriendtolife
Therearesome______universitiesintheUnitedKingdom,includingtheOpenUniversity.
TherehasbeenanecologicaltriumphintheprovincesofSwedenwhereIhavespentthepastthreeweeks.Thewolfandthelynx(
EndtheUniversityasWeKnowIt1.ProblemsconfrontingAmericanuniversitiesA.impracticalgraduate【B1】【B1】______B.isolat
HowtoEnsureSurvivalintheCollegeDormLifeincollegedormcanbehard,especiallyforthefirst-years.HereShahJ.Ch
HowtoEnsureSurvivalintheCollegeDormLifeincollegedormcanbehard,especiallyforthefirst-years.HereShahJ.Ch
Associetychanges,socialvaluesandlinguisticvaluesbegintodiverge.Languagecontainstraditionalvalues—thisiswhichis
Virtuallyeverydayoftheyearseesanotherartbiennialopeningsomewhereintheworld.Theroleoftheseexhibitionsistosh
ThecapitalofNewZealand—Wellingtonislocatedinthe______oftheNorthIsland.
"Almostuniversally,womenhavefailedtoreachleadingpositionsinmajorcorporationsandprivatesectororganizations,resp
随机试题
患者,男性,55岁。既往体健,近6个月来有进行性厌食,消瘦乏力,伴上腹部不适,近2个月来上述症状逐日加重,检查:Hb80g/L,尿常规正常,SGVI、30U,血清白蛋白30g/L,球蛋白20g/L,BSP潴留试验:45min<5%,大便隐血试验(+++)。
不属于精神分裂症常见症状的是
按照税法效力的不同,可以将税法分为( )。
2016年7月1日,人民法院裁定受理了A公司的破产申请,并同时指定了管理人。在该破产案件中,存在下述情况:(1)A公司的股东甲公司抽逃出资100万元,其中A公司董事张某协助其抽逃出资。2016年7月10日,管理人代表A公司对甲公司和张某提起诉讼,要求
下列项目适用17%税率的是()。
教育家()曾说:“我十分明确地把培养有用的国家公民当作国家国民学校的教育目标,并且是国民教育的根本目标。”这是教育史上较为典型的社会本位目的论思想。
若大气降水是100%,以前渗入某城市地下和转化为城市地表径流的数量分别占降水的50%和10%。随着城市化进程,现在渗入地下和转化为地表径流的数量分别占降水的32%和43%。据此回答问题。产生城市地表径流比重增加的原因是()。
甲、乙、丙、丁参加体育训练,近期10次跳绳测试的平均成绩都是每分钟174个,其方差如下表:则这10次跳绳中,这四个人发挥最稳定的是()
甲、乙双方签订了货物买卖合同,由甲方向乙方提供货物。后经甲方同意,乙方将合同中的权利、义务转给丙。这样,法律关系的()就发生了变更。
现代科学技术开始于19世纪末叶,当时出现了有组织的规模较大的科学技术研究单位,这有内在的和外部的原因。内在原因是科学技术到这时期比较复杂,专业、专科很多。外部原因是当时出现的一场技术革命。这段话主要支持了这样一种观点( )
最新回复
(
0
)