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
2016-01-30
20
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://jikaoti.com/ti/ryyYFFFM
0
考博英语
相关试题推荐
(清华大学2008年试题)ThechangesingloballyaveragedtemperaturethathaveoccurredattheEarth’ssurfaceoverthepastcenturya
(复旦大学2011年试题)Aconsiderableamountofmedicalresearchisaimedatidentifyingriskfactorsfordisease.Therationalebehi
Somepeoplefindthatcertainfoods______theirheadaches.(复旦大学2011年试题)
Studentsofthegreatsociety,lookingatmankindinthelongperspectiveofhistory,havefrequentlybeendisposedtoseekane
Today,theTowerofLondonisoneofthemostpopulartourist【C1】______andattractsoverthreemillionvisitorsayear.Itw
Humanityusesalittlelessthanhalfthewateravailableworldwide.Yetoccurrencesofshortagesanddroughtsarecausingfamin
Asthemanagerwasawayonabusinesstrip,Iwasaskedto______theweeklystaffmeeting.
Scholarsandstudentshavealwaysbeengreattravelers.【T1】Theofficialcasefor"academicmobility"isnowoftenstatedinimp
Surveyshaveshownthatmostfootballandbasketballinjuriesinvolvetheknee,eitherthroughtwistingorthroughapplicationo
Forgetfootball.Atmanyhighschools,thefiercestcompetitionisbetweenCokeandPepsioverexclusive"pouringrights"tosel
随机试题
那位生物学家相信某些动物物种正受到灭绝威胁。
A、Itsankintotheseaduetooverloading.B、ItranintoNicaragua’sBigCornIsland.C、Itdisappearedbetweentwolargeislands
用两种不同探测深度的三侧向视电阻率曲线重叠判断油、水层,效果较好。()
A.肌酸激酶B.肌动蛋白C.肌钙蛋白D.肌球蛋白E.磷酸化酶当肌细胞内Ca2+浓度增高时,分子构象改变的首先是
浅二度烧伤的特点,不包括
可行性研究和项目评估阶段,误差率应在()以内。
党和国家为完成一定历史时期的教育发展目标和任务,依照党和国家在一定历史时期的基本任务、基本方针所确定的关于教育工作的策略、方针和行动准则是()
根据以下资料,回答问题。2010年,某省广电实际总收入为145.83亿元,同比增长32.07%。其中,广告收入为67.08亿元,同比增长25.88%;有线网络收入为45.38亿元,同比增长26.35%;其他收入为33.37亿元,同比增长57.3%。
NoJetlag(时差反应)AnymoreMostpeoplewhotravellongdistancescomplainofjetlag(时差反应).Jetlagmakesbusinesstravelersless
HowdidthetravellerhearaboutNewYork?Fromthefiat,thetravellercouldseethe______.
最新回复
(
0
)