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
2025-04-06
24
管理
问题
Cells cannot remain alive outside certain limits of temperature, and much narrower limits mark the bound-aries of effective functioning. Enzyme systems of mammals and birds are most efficient only within a narrow【C1】______around 37℃; a【C2】______, of a few degrees from this value seriously impairs their functioning. Even though cells can survive wider【C3】______, the integrated actions of bodily systems are impaired. Other animals have a wider tolerance【C4】______changes of body temperature.
For centuries【C5】______has been recognized that mammals and birds differ from other animals in the way they regulate body temperature. Ways of【C6】________ the difference have become more accurate and meaningful over time, but popular terminology still reflects the old division【C7】_________ " warm blooded" and " cold blooded" species; warm blooded included mammals and birds,【C8】______all other creatures were considered cold blooded.【C9】______more species were studied, it became evident that this classification was【C10】______A fence lizard usually has a body temperature only a degree or two below【C11】______of humans and so is not cold.【C12】______the next distinction was made between animals that maintain a【C13】______body temperature and those whose body temperature varies with their environment. But this classification also proved inadequate,【C14】______among mammals there are many that vary their body temperatures during hibernation.【C15】______ many invertebrates that live in the【C16】______of the ocean never experience a change in the chill of the deep water, and their body temperatures remain constant. The current distinction is between animals whose body temperature is【C17】_________chiefly by internal metabolic processes and those whose temperature is regulated by the【C18】______The latter do so mainly by moving to favorable sites or by changing their exposure to【C19】_________ sources of heat. Mammals and birds also regulate their temperature by choosing favorable environments, but primarily they regulate their temperature by making a variety of internal【C20】_________. [br] 【C6】
选项
A、measuring
B、understanding
C、characterizing
D、charting
答案
C
解析
动词词义辨析。本句提到传统上这种差异表现为“冷血动物”和“恒温动物”,但是随着时间的推移,现在的分类越来越准确,也即表征动物间的不同的方式是越来越准确。characterize意为“表现……的特征”,符合题意。故答案为C。
转载请注明原文地址:http://tihaiku.com/zcyy/4029399.html
相关试题推荐
HisaccountofhisexperienceinAntarcticcannotbedismissedas______.A、unfair
______youcannotpickmeupattheairport,pleasecallmeimmediately.A、Inorde
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchna
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchna
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchna
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchna
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchna
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchna
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchna
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchna
随机试题
THEDOMESTICATIONOFANIMALS1Thedomesticationofwildspecies
Researchershaveestablishedthatwhenpeoplearementallyengaged,biochemi
杭州市总体规划最终审批部门是( )。A.杭州市人民政府 B.浙江省人民政府
胡某、李某、陈某三人拟共同发起设立一家“A房地产经纪公司”(以下简称“A公司”)
初产妇,30岁。产后5天,下腹疼痛3天,发热1天。查体:恶露无异味,子宫增大。既
业主委员会筹备组的工作内容,应当在首次业主大会会议召开()日前以书面形式在物业
下面各选项中,属于中央银行资产负债表中的负债的是()。 A.贴现及放款B.
一住店客人未付房钱即想离开旅馆去车站。旅馆服务员揪住他不让走,并打报警电话。客人
A.驱虫 B.清燥润肺 C.清热肃肺 D.清热凉肝 E.泻火通便小儿消积
后张法预应力混凝土T形梁施工,预应力筋的张拉应以应力控制为主,伸长值作为校核,顶
最新回复
(
0
)