首页
登录
职称英语
Cells cannot remain alive outside certain limits of temperature, and much n
Cells cannot remain alive outside certain limits of temperature, and much n
游客
2023-11-15
38
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 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 bodily 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 blood- ed " 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] 【C14】
选项
A、due to
B、because
C、because of
D、and
答案
B
解析
本句前半句是承接上文的一种相反观点,后半句是支持这个观点的例子,由此可推断例子与观点之间是因果关系,选项B中的原因连词because符合题意。
转载请注明原文地址:https://tihaiku.com/zcyy/3189753.html
相关试题推荐
Theyoungerperson’sattractiontostereoscannotbeexplainedonly______famil
Asthetemperaturedroppedabruptly,thecamperswere______alloverwithcold.
Clothingmadeofplasticfibershascertainadvantagesover______madeofnatur
Whatisthewoman’shobby?[originaltext]M:MydoctorsaysIneedanoutsideint
Whattopicdoesthespeakerexplainindetails?[br][originaltext]Certain
Whattopicdoesthespeakerexplainindetails?[br][originaltext]Certain
Whattopicdoesthespeakerexplainindetails?[originaltext]Certainphras
Outsidemyofficewindowthereisafire______ontheright.A、escapeB、ladderC
Therewasa______stormoutsideanditwashardtowalk,soyou’dbetterstayi
Clothingmadeofplasticfibershascertainadvantagesover______madeofnatur
随机试题
[originaltext]W:Areyoureallygoingtoquityourjob?M:Well...I’mnotsure.
WhowroteTheCanterburyTales?A、GeoffreyChaucer.B、WilliamShakespeare.C、John
Through______withmytwinbrother,Iwastakenforabrilliantfootballer.A、co
全民国防教育的基础是( )的国防教育。A.企业事业组织 B.学校 C.党政
下列物理量中,属于室内热环境湿空气物理量的基本参数是( )。A.湿球温度、空气
关于施工合同示范文本的说法,正确的是()。A:示范文本是最规范、最完备的施工合
A.服用茶碱类平喘药 B.鸡尾酒疗法服用蛋白酶抑制剂 C.茶中的成分 D.
A.硫脲类 B.放射性I C.碘化物 D.甲状腺激素 E.普萘洛尔主要用
某公司生产的婴幼儿奶粉蛋白质含量低于规定标准,市场监督管理部门认定该奶粉为不合格
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
最新回复
(
0
)