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
2013-11-06
90
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://kaotiyun.com/show/DUZO777K
0
专业英语八级
相关试题推荐
Whenyoustarttalkingaboutgoodandbadmannersyouimmediatelystartmeetingdifficulties.Manypeoplejustcannotagreewha
OnlineUniversityDegreesThroughDistanceEducationMoreandmoreuniversitiesaroundtheworldareofferingonlinelanguageco
OnlineUniversityDegreesThroughDistanceEducationMoreandmoreuniversitiesaroundtheworldareofferingonlinelanguageco
OralPresentationOneofthewaysthatteachersusetoinvolvetheirstudentsmoreactivelyinthelearningprocessis(1)_____
Excessivecaloriesfromsugarcancontributetoweightproblems,andsugarisalsowellknownforitsabilitytopromoteteethd
Excessivecaloriesfromsugarcancontributetoweightproblems,andsugarisalsowellknownforitsabilitytopromoteteethd
Excessivecaloriesfromsugarcancontributetoweightproblems,andsugarisalsowellknownforitsabilitytopromoteteethd
TheroleofeyecontactinaconversationalexchangebetweentwoAmericansiswelldefined;speakersmakeacontactwiththeey
WhatsuggestiondoesMsLiongivetothestudentsusingInternetasaninformationsource?
随机试题
图中标志的含义是________。
赵女士兴之所至,填词一首,该词上下阙不计标点共70字,由此可知,她选用的词牌是()
饱和盐水浮聚法最适用于检查
X线管中形成高速电子流的条件,不包括
小肠是食物吸收的主要部位的原因是()。
高炉出铁后,用耐火材料将铁口迅速堵住的专用设备是()。
软件危机是软件产生过程中出现的一种现象,下述现象()是其主要表现。Ⅰ.软件需求增长难以满足Ⅱ.软件开发成本提高Ⅲ.开发进度难以控制Ⅳ.软件质量不易保证
YourarethesalesmangerofACLCompany.Yourcustomer,JacksonBryer,invitesyoutohavedinnerwithhimonTuesdaytheTwelf
Ifyouareworriedaboutthingsandareunderalotofstressatworkorschool,thenyouareprobablynotsleepingwell.Worry
Discussion—about5minutesInthispartofthetestyouaregivenadiscussiontopic.Youhave30secondstolookattheprompt
最新回复
(
0
)