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
63
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】_________.
【C19】
选项
A、various
B、external
C、environmental
D、exterior
答案
B
解析
形容词词义辨析。根据前句中的internal判断,此处词义应填入与之相对的形容词。选项中,external(外在的)符合句意。故答案为B。
转载请注明原文地址:https://kaotiyun.com/show/JgLO777K
0
考博英语
相关试题推荐
Theriseof"temp"workhasfurthermagnifiedthedecreasingrightsandalienationoftheworker.ItiscommoncorporatePractic
ThemilitaryaspectoftheUnitedStatesCivilWarhasalwaysattractedthemostattentionfromscholars.Theroarofgunfire,t
ClassifiedAdvertisingisthatadvertisingwhichisgroupedincertainsectionsofthepaperandisthusdistinguishedfromdisp
Priortothe20thcentury,manylanguageswithsmallnumbersofspeakerssurvivedforcenturies.Theincreasinglyinterconnected
GeniusThegreatestresultsinlifeareattainedbysimplemeans,andtheexerciseofordinaryqualities.Thecommonlifeof
PresidentRoosevelt’sadministrationsufferedadevastatingdefeatwhenonJanuary6,1936,theAgriculturalAdjustmentActwas
TheAmericaneconomy,whetheringovernmentorprivateindustry,hasfoundretirementaconvenientpracticeformanagingthelab
TheAmericaneconomy,whetheringovernmentorprivateindustry,hasfoundretirementaconvenientpracticeformanagingthelab
Theageatwhichyoungchildrenbegintomakemoraldiscriminationsaboutharmfulactionscommittedagainstthemselvesorothers
随机试题
Itwaswonderfulupthere.Ralphwantedtoreachoutand【21】astar,forthey【22】soclose.Hecouldseetheearthgettingsmaller
胡女士,36岁,初次妊娠7个月,患有妊高症。当妊娠危及胎儿母亲的生命时,可允许行人工引产术,其原则是()
关于医嘱种类的解释,下列哪项不对
关于生理止血机理的叙述,下列哪项是错误的
设该梁承受的扭矩设计值T=15.0kN·m,弯矩设计值M=105kN·m,剪力设计值V=80kN,则以下______项判断正确?
建筑安装工程税金是指国家税法规定的应计入建筑安装工程造价的()。
丁公司最近参与中东某国水坝建设项目投保,在激烈竞争中最终中标。按照当地法律,丁公司必须与当地企业成立投标联合体方可投标,中标后该投标联合体即转为项目公司负责水坝建设。该国政局相对稳定,但实行外汇管制。按照中标通知书及最终签署合同条款约定,对于前期
高楼:庭院
你有一位在编的同事突然去世,其家属悲痛万分。因为这位同事是家里唯一的经济支柱。其家属要求单位让其女儿替岗。如果你是这个单位的工作人员,你会怎么接待这位去世同事的家属?
下列关于局域网设备的描述中,错误的是()。
最新回复
(
0
)