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
31
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] 【C11】
选项
A、which
B、that
C、what
D、much
答案
B
解析
代词用法。空格需填一个代词,代替前面提到的温度,选项中只有that可以指代前面所用到的词,以避免用词的重复。故答案为B。
转载请注明原文地址:https://tihaiku.com/zcyy/4029404.html
相关试题推荐
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchna
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchna
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchna
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchna
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchna
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchna
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchna
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchna
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchna
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchna
随机试题
StandardEnglishisthevarietyofEnglishwhichisusuallyusedinprintan
Sometimeseventhemosttamedanimalswouldattackus_________.A、unexpectedlyB
Obesityisthesinglegreatestcauseofearlydeathsaftersmoking.Itresul
在5阶段的生命周期中,系统测试分析报告是在()阶段的成果。A.系统设计阶段
J66、用有载调压装置调压时,对系统来说()。(A)可提高功率因数;
下列场所,宜选用全淹没应用方式的开式细水雾灭火系统的是( )。A.油浸变压器室
甲、乙双方约定,由丙每月代乙向甲偿还债务500元,期限2年。丙履行5个月后,以自
我国宪法规定,中华人民共和国的国家机构实行()。A.首长责任制 B.民主
A.组氨酸 B.α-酮戊二酸 C.谷氨酸 D.天门冬氨酸 E.酪氨酸尿素
根据《仲裁法》的规定,下列情形中,属于仲裁员审理案件时必须回避的
最新回复
(
0
)