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
2018-01-28
57
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/SisK777K
0
专业英语八级
相关试题推荐
A、Itwillreducethepressureoftheexperiment.B、Itwilldistractpeoplefromtheirresearch.C、Itwillgivepeopletheexcuse
A、Exercisecanbringbetterchanceofdecreasingbreastcancer.B、TheCaliforniaTeacherStudyprovestheeffectofexerciseon
InterculturalLearningManyteachersmaywonder"WhatamIactuallydoing?"sometimes.Itdoesn’tseemenoughtoteachgramm
InterculturalLearningManyteachersmaywonder"WhatamIactuallydoing?"sometimes.Itdoesn’tseemenoughtoteachgramm
Untilrecently,mostpopulationgrowthhasoccurredinrelativelydenseurbanenvironments.Inanotherwords,evenifwewerewi
Untilrecently,mostpopulationgrowthhasoccurredinrelativelydenseurbanenvironments.Inanotherwords,evenifwewerewi
Somepeoplesaylovemakestheworldgoaround.Otherssayitisnotlove:it’smoney.Sincethetruthisthatitisenergythat
(1)TheEuropeanUnionhasbeenoperatingin20officiallanguagessincetennewmemberstatesjoinedthelegislativebodylasty
A、Old-agesickness.B、Loosefamilyties.C、Poormentalabilities.D、Difficultiesinmaths.D本题考查McKay教授无法做出解释的内容。McKay教授说“似乎毫无疑问
随机试题
宾客再次光临时又带来几位新宾客,应对他们像老朋友一样热情招呼接待。
内环境是指
生理情况下,白细胞变化规律正确的是
胆道蛔虫病除剑突下阵发性绞痛外,还常伴有
关于公文使用,下列说法错误的是()。
2010年,农村居民人均纯收入5919元,剔除价格因素,比上年实际增长10.9%;城镇居民人均可支配收入19109元,实际增长7.8%。农村居民家庭食品消费支出占消费总支出的比重为41.1%,城镇为35.7%。按2010年农村贫困标准1274元测算,年
3,10,21,35,51,()。
按照美国的做法,垃圾债券一般是指信用评级在BBB(Baa)以下的债券,又称为()。
在数据库应用系统设计中,如果在事务中存在和用户的长时间交互,它会带来哪些坏处()。Ⅰ.降低系统的并发度Ⅱ.增加死锁的数量Ⅲ.破坏数据的一致性Ⅳ.影响检查点的效果
Shewouldhavefinishedthelastpageofherplay,butshe______tostoptofeedhercryingbaby.
最新回复
(
0
)