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
58
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:http://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
Whatarethespeakersdiscussing?[br][originaltext](Woman)Ican’tbelieveth
国际金融internationalfinance
Educationisanareaofsociallifeinwhichinformationtechnologyischang
教书是专业课教师的基本任务,育人则主要是
A、18.0kPa B、10.8kPa C、12.0kPa D、
下列有关基金销售直销和代销方式比较的表述,不正确的是()。A.代销机构通
A.感受B.感染C.接合D.转化E.转导细菌直接摄取外界DNA
某知名科技公司对员工绩效考评制度进行了调整,取消了以往七个等级(A、B、C、D、
在研究前人成果及结合实践基础上提出心智技能形成的三阶段说的是( )A.潘菽
在项目团队组建过程中,项目经理通常要向入选成员说明() A.项目目标与意
最新回复
(
0
)