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 funct
Cells cannot remain alive outside certain limits of temperature, and much narrower limits mark the boundaries of effective funct
admin
2012-07-22
32
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 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 bodily 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 blood- ed " 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】______ .
【C20】
选项
A、adjustments
B、compensations
C、regulations
D、arrangements
答案
A
解析
adjustment意为通过调整来适应某一因素,符合句意。
转载请注明原文地址:https://kaotiyun.com/show/SlmK777K
0
专业英语四级
相关试题推荐
Hewasoneofthegreatestscientiststheworldhaseverknown,yetifIhadtoconveytheessenceofAlbertEinsteininasingl
Whatarethetwopeopletalkingaboutinthisconversation?
IfIhadremembered______thewindow,thethiefwouldnothavegotin.
Underthepresentsystem,stateenterprisesmust______allprofitstothegovernment.
Forthe1992WinterGames,Frenchorganizersconstructedanewmotorway,parkinglotsandrunsforskiingintheAlps.Environme
Whathappenedafterthemanbuilthisfirstcomputer?
VisitorstoSt.PaulCathedralaresometimesastonishedastheywalkroundthespaceunderthearchtocomeupastatuewhichwo
Notonly______peopletosendwords,music,andcodestoanypanoftheworld,itcanalsobeusedtocommunicatefarintospac
Somedayastrangerwillreadyoure-mailwithoutyourpermissionorscanthewebsitesyou’vevisited.Orperhapssomeonewillca
Thelecturerfounditdifficulttogetoverhisideastotheaudience.Theunderlinedpartmeans______.
随机试题
下列说法正确的有()。
用线描勾勒《树神药叉女》。
酸中毒时,血钾浓度的变化趋向是()
中医最可能的诊断是选方宜
根据我国刑法关于追诉时效期限的规定,法定最高刑为()不再追诉。
简述票据权利和义务的内容。
在正向市场上,只要基差变大,无论期货、现货价格是上升还是下降,买入套期保值者都不可能得到完全保护。()
先行组织者
有时,疼痛能使人变得敏锐、清醒,唤起人道情怀,恢复本性良知。不疼者往往不知疼者之疼,而疼者因己之疼而________,易于体验并感知他人的苦楚,生出同情心,或许还会上升到对人类、对存在的________之心。填入划横线部分最恰当的一项是:
Itisabsolutely______thatourclasswillwinthegame.
最新回复
(
0
)