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
52
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】_________.
【C2】
选项
A、difference
B、change
C、gap
D、departure
答案
D
解析
名词词义辨析。前一分句提到正常温度需要在37℃左右,本分句讲到较小的变化会严重破坏生物酶系统的正常功能,谓语动词impair表示“削弱”。选项中的departure与impair最搭配,意为“脱离常规”。故答案为D。
转载请注明原文地址:https://kaotiyun.com/show/ugLO777K
0
考博英语
相关试题推荐
ThemilitaryaspectoftheUnitedStatesCivilWarhasalwaysattractedthemostattentionfromscholars.Theroarofgunfire,t
ClassifiedAdvertisingisthatadvertisingwhichisgroupedincertainsectionsofthepaperandisthusdistinguishedfromdisp
Researchiscommonlydividedinto"applied"and"pure".Thisclassificationisarbitraryandloose,butwhatisusuallymeantis
PresidentRoosevelt’sadministrationsufferedadevastatingdefeatwhenonJanuary6,1936,theAgriculturalAdjustmentActwas
For【C1】______thebloodshedandtragedyofD-Day,thebeachesofNormandywillalwaysevokeacertain【C2】______:ayearning
For【C1】______thebloodshedandtragedyofD-Day,thebeachesofNormandywillalwaysevokeacertain【C2】______:ayearning
TheAmericaneconomy,whetheringovernmentorprivateindustry,hasfoundretirementaconvenientpracticeformanagingthelab
TheAmericaneconomy,whetheringovernmentorprivateindustry,hasfoundretirementaconvenientpracticeformanagingthelab
Theageatwhichyoungchildrenbegintomakemoraldiscriminationsaboutharmfulactionscommittedagainstthemselvesorothers
随机试题
引起有毒动物食物中毒的是________。
科研论文的基本要素是什么?
组织的全员公关培训即指对全员进行公关教育,其重点是()
在对重大危险源进行辨识和评价后,应针对每一个重大危险源制定出一套严格的()。
建设工程监理合同的标准条件不包括( )。
甲企业从某拍卖公司通过拍卖购进两辆轿车,其中一辆是未上牌照的新车,不含税成交价60000元,国家税务总局核定同类型车辆的最低计税价格为120000元;另一辆是已使用6年的轿车,不含税成交价5000元。甲企业应纳车辆购置税()元。
针对考评时出现的优先和近期效应,所采取的克服方式不包括()。
要建立新人生观,除了养成道德的勇气而外,还要能负起知识的责任。知识是人类最高智慧发展的结晶,是人类经验中最可珍贵的宝藏,是人人都能取得、都能具备的;因此凡有求得知识机会的人,都可说是得天独厚,享受人间特惠的人,所以都应该负一种特殊的责任。而且知
Reskillingissomethingthatsoundslikeabuzzwordbutisactuallyarequirementifweplantohaveafuturewherealotofwou
阅读以下说明,回答问题1、问题2、问题3、问题4和问题5,将解答填入对应栏内。[说明]电话拨号、ADSL专线等是常见上网方式,最近新兴的Intemet接入方式是使用电力线上网,而普通家庭中使用一根普通电力线也可以上网。电力线的普及范围是其他
最新回复
(
0
)