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 bound-aries of effective func
Cells cannot remain alive outside certain limits of temperature, and much narrower limits mark the bound-aries of effective func
admin
2015-04-24
70
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】_________.
【C5】
选项
A、they
B、it
C、we
D、what
答案
B
解析
形式主语。空格的词要作that引导从句的形式主语。选项中,只有it能作形式主语。故答案为B。
转载请注明原文地址:https://kaotiyun.com/show/fgLO777K
0
考博英语
相关试题推荐
ThemilitaryaspectoftheUnitedStatesCivilWarhasalwaysattractedthemostattentionfromscholars.Theroarofgunfire,t
CalledbymanycriticsthegreatestachievementofEnglishlyricalpoetry,thiselegywaswrittenuponthedeathofafellowalu
CalledbymanycriticsthegreatestachievementofEnglishlyricalpoetry,thiselegywaswrittenuponthedeathofafellowalu
Researchiscommonlydividedinto"applied"and"pure".Thisclassificationisarbitraryandloose,butwhatisusuallymeantis
GeniusThegreatestresultsinlifeareattainedbysimplemeans,andtheexerciseofordinaryqualities.Thecommonlifeof
For【C1】______thebloodshedandtragedyofD-Day,thebeachesofNormandywillalwaysevokeacertain【C2】______:ayearning
For【C1】______thebloodshedandtragedyofD-Day,thebeachesofNormandywillalwaysevokeacertain【C2】______:ayearning
For【C1】______thebloodshedandtragedyofD-Day,thebeachesofNormandywillalwaysevokeacertain【C2】______:ayearning
随机试题
简述消费结构对产业结构的导向作用。
依据我国土地管理法的规定,国家编制土地利用总体规划,划定土地用途,将土地分为()。
某名牌大学通过划拨方式取得t00亩国有土地的使用权,在该片土地上建成了几栋房屋,由于学校需求有限,遂将其中的一栋房屋出租,将另一栋房屋转让,某律师对此作出如下建议,其中正确的是哪个?
以下哪一种不属于沉积岩的结构:
下列关于合规文化的特点,说法错误的有()。
商业银行应在每一会计年度终了编制本年度个人理财业务报告,年度报告应包括()。
给定材料材料1按照国际通行的老龄社会标准,中国从1999年开始迈人老龄化社会。全国老龄委办公室的数据显示,2013年中国60岁及以上的老人比例达到14.8%,人数突破两亿大关。根据第六次人口普查数据,农村整体老龄化程度比城市还高出3%。
Mistakesdon’tjusthappen:theyoccurforareason.Tofindoutthereason,andthenmakingthemistakebecomes______.
运动中扭伤后可采取的正确措施是()。
一体化走廊管理指的是政府通过集中改善城市中若干条交通干道的基础设施、公共交通服务或公共交通管理方式。来提高所有出行者的出行速度、出行可靠性以及出行安全性。根据上述定义。下列属于一体化走廊管理的是:
最新回复
(
0
)