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 boundaries of effective func
Cells cannot remain alive outside certain limits of temperature and much narrower limits mark the boundaries of effective func
admin
2017-04-23
33
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 with a narrow range around 37℃; a departure【M1】______
of a few degrees from this value serious impairs their functioning.【M2】______
Even though cells can survive wider fluctuations the integrated
actions of bodily systems are impaired. Other animals have a wide【M3】______
tolerance for changes of bodily temperature.
For century it has been recognized that mammals and birds【M4】______
differ other animals in the way they regulate body temperature.【M5】______
Ways of characterizing the difference have become more accurate
and meaningful over time, but popular terminology still reflects an【M6】______
old division into " warm-blooded" and " cold-blooded" species;
warm-blooded included mammals and birds whereas all other
creatures were considered cold-blooded. As more species were
studied, it became evident that this classification was adequate. A【M7】______
cold-blooded fence lizard usually has a body temperature only a
degree or two below those of humans and so is not cold. Therefore【M8】______
the next distinction was taken between animals that maintain a【M9】______
constant body temperature, called homeotherms, and those whose
body temperature varies with their environments, called
poikilotherms. But this classification was also proved inadequate,【M10】______
because among mammals there are many that vary their body
temperatures during hibernation. Furthermore, many invertebrates
that live in the depths of the ocean never experience change in the
depths of the ocean, and their body temperatures remain constant.
【M6】
选项
答案
an—the
解析
词汇错误。此处是特指过去对动物的一种划分方法,即把动物划分为暖血动物和冷血动物,故应用定冠词。
转载请注明原文地址:https://jikaoti.com/ti/m2eMFFFM
0
专业英语八级
相关试题推荐
TeachingMethodsforEffectiveCommunicationI.Introduction:someteachingapproacheshelpfultoclassroomcommunication—we
TeachingMethodsforEffectiveCommunicationI.Introduction:someteachingapproacheshelpfultoclassroomcommunication—we
Whatismoredifficultforstudentswhenlearningtocomplain?
Thegrowthassessmentwasdowngradedby______percentinthesecondquarteroftheyear.
Accordingtotheinterviewer,whatattitudedomostyoungpeopleholdtowardskeepinghealthy?
GlobalwarmingcouldactuallychilldownNorthAmericawithinjustafewdecades,accordingtoanewstudythatsaysasuddenco
TheJapanesesaytheysufferfromaneconomicdiseasecalled"structuralpessimism".Overseastoo,thereisatendencytoseeJ
Thestrategiesemployedbylearnersintheplanning,supervisionandevaluationoftheirstudyisdefinedas
WhichofthefollowingbroadcastingcompaniesbelongstotheUnitedStates?
WaltWhitmanhelpedtopromotethedevelopmentof
随机试题
华北某厂1260m3级高炉扩容改造工程。根据招标文件要求,为了实现快速、高效、优质、低耗地完成扩容改建任务,该扩容改造,应采用高炉整体平移新技术。高炉分两段安装:第一段为移送;第二段为悬吊,高炉本体工程拟定在拼装平台上基本完成,尽量缩短停炉后施工工期,保证
阴茎癌患者肿瘤边缘已接近阴茎基部,左侧腹股沟淋巴结活检有转移,应如何处理
( )是对采购、生产、安装、检验和试验以及服务的要求,对后续活动有重大影响。
一般而言,与融资租赁筹资相比,发行债券的优点是()。
下列关于组织结构的表述中正确的有()。
工业包装、商业包装均为逐个包装。
案例一般资料:求助者,女性,32岁,大学教师。案例介绍:求助者与丈夫是大学同学,双方感情很好,一年前,求助者生下女儿,母亲过来照顾,一家人其乐融融,半年前,单位评定职称,求助者因为休产假,在工作量和科研成果方面与同事相比又没有优势,没有
没有革命的理论就没有革命的行动,这句话说明的哲学道理是()。
Whatisthewoman’sjob?
SpeakerA:I’mreallygrateful(感谢的)toyou.SpeakerB:________
最新回复
(
0
)