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
2023-12-01
61
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] 【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://tihaiku.com/zcyy/3236343.html
相关试题推荐
[originaltext]M:Ofcourse,itistruetosaythattherearecertainelementsi
[originaltext]M:Ofcourse,itistruetosaythattherearecertainelementsi
[originaltext]M:Ofcourse,itistruetosaythattherearecertainelementsi
Cellscannotremainaliveoutsidecertainlimitsoftemperatureandmuchna
Cellscannotremainaliveoutsidecertainlimitsoftemperatureandmuchna
Cellscannotremainaliveoutsidecertainlimitsoftemperatureandmuchna
Cellscannotremainaliveoutsidecertainlimitsoftemperatureandmuchna
Cellscannotremainaliveoutsidecertainlimitsoftemperatureandmuchna
IcametoAfricawithonepurpose:Iwantedtoseetheworldoutsidethepe
IcametoAfricawithonepurpose:Iwantedtoseetheworldoutsidethepe
随机试题
【B1】[br]【B6】A、increasingB、revisingC、tiringD、worryingC语义衔接题。由"freeingus"和厨
[originaltext]Howevergiftedsomeonemaybe,heorshestillhadtodevelop
[originaltext]Duringthesummeryoushouldbeevenmorecarefulthanusual
通过开展全民消防安全宣传与教育培训活动,竖立()的理念激发公民关注消防安全、学
对于这种观点:“t检验适用于样本容量小于30的情况,而大样本才适合使用z检验。”
某家商业银行违反规定通过提高存款利率及采用不正当手段吸收存款,下列关于该银行应该
(2019年真题)提取莪术挥发油常用的方法是A.浸渍法 B.渗漉法 C.超声
下列险种中,往往采用预收保费制的是( )。A.养老保险 B.企业财产保险
根据《建筑工程施工质量验收统一标准》,节能工程质量验收应由( )组织。A.安装
婴儿食物特殊动力作用(SDA)所需能量A.占总能量的50%~60% B.占总能
最新回复
(
0
)