首页
登录
职称英语
Cells cannot remain alive outside certain limits of temperature and much na
Cells cannot remain alive outside certain limits of temperature and much na
游客
2023-11-30
31
管理
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. [br] 【M10】
选项
答案
was—去掉was
解析
词汇错误。prove在表示“证明是,原来是”这一意思时,通常用在prove to be这一结构中,其中to be可以省略。例如:The rumor proved(to be)true.这谣传证明是真的。
转载请注明原文地址:https://tihaiku.com/zcyy/3231853.html
相关试题推荐
Youngpeoplearefacinganuncertainfuture.Asthe21stcenturydawned,the
Youngpeoplearefacinganuncertainfuture.Asthe21stcenturydawned,the
Youngpeoplearefacinganuncertainfuture.Asthe21stcenturydawned,the
Youngpeoplearefacinganuncertainfuture.Asthe21stcenturydawned,the
ThreeConceptsinArtHistoryI.Commonalities-Certainchunkof【T1】_____,【T1】_
ThreeConceptsinArtHistoryI.Commonalities-Certainchunkof【T1】_____,【T1】_
ThreeConceptsinArtHistoryI.Commonalities-Certainchunkof【T1】_____,【T1】_
ThreeConceptsinArtHistoryI.Commonalities-Certainchunkof【T1】_____,【T1】_
ThreeConceptsinArtHistoryI.Commonalities-Certainchunkof【T1】_____,【T1】_
ThreeConceptsinArtHistoryI.Commonalities-Certainchunkof【T1】_____,【T1】_
随机试题
THEKEYLESSSOCIETYA.StudentswhowanttoentertheUnive
Duringtheearlyyearsofthiscentury,wheatwasseenastheverylifeblood
SevenWaystoCreateaHappyHouseholdA)Everyfamilyisdifferent,with
About2percentofAmericanstudentsarenowtaughtathome.Educatorsarec
Pen-palLetters:TheCross-curricularExperienceIasked
[originaltext]W:Hi,Sam,IhatetobotheryoubutIwonderifIcouldhaveaw
某项目为了赶工期,建设单位要求施工单位压缩2个月合同工期,工地施工人员根据要求
无牙颌患者的口内特征为() A.牙列缺失 B.牙冠缺损 C
A.L~L椎间盘突出 B.L~L椎间盘突出 C.L~S椎间盘突出 D.L~
撰写培训效果评估报告时,概述评估实施的过程部分要交代清楚评估方案的( )。A.
最新回复
(
0
)