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
20
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】_________.
【C8】
选项
A、however
B、whereas
C、with
D、though
答案
B
解析
逻辑关系。前句讲到恒温动物,后句提到其他的动物被认为是冷血动物。明显这是两类动物的对比,选项中,表转折的连词whereas可起到连接作用。故答案为B。
转载请注明原文地址:https://kaotiyun.com/show/AgLO777K
0
考博英语
相关试题推荐
Thereisanewtypeofsmalladvertisementbecomingincreasinglycommoninnewspaperclassifiedcolumns.Itissometimesplaced
Theriseof"temp"workhasfurthermagnifiedthedecreasingrightsandalienationoftheworker.ItiscommoncorporatePractic
CalledbymanycriticsthegreatestachievementofEnglishlyricalpoetry,thiselegywaswrittenuponthedeathofafellowalu
Priortothe20thcentury,manylanguageswithsmallnumbersofspeakerssurvivedforcenturies.Theincreasinglyinterconnected
Priortothe20thcentury,manylanguageswithsmallnumbersofspeakerssurvivedforcenturies.Theincreasinglyinterconnected
GeniusThegreatestresultsinlifeareattainedbysimplemeans,andtheexerciseofordinaryqualities.Thecommonlifeof
For【C1】______thebloodshedandtragedyofD-Day,thebeachesofNormandywillalwaysevokeacertain【C2】______:ayearning
TheAmericaneconomy,whetheringovernmentorprivateindustry,hasfoundretirementaconvenientpracticeformanagingthelab
Theageatwhichyoungchildrenbegintomakemoraldiscriminationsaboutharmfulactionscommittedagainstthemselvesorothers
Theageatwhichyoungchildrenbegintomakemoraldiscriminationsaboutharmfulactionscommittedagainstthemselvesorothers
随机试题
定作人自备面料的制衣合同属于()
JamesJoycewasanIrishnovelistwhorevolutionizedthemethodsofdepictingcharactersanddevelopingaplotinmodernfiction
交感神经节后纤维的递质可以是
国家对企业国有股权管理的内容包括:()。
2011年3月,甲房地产公司采用预收款方式将一栋自建写字楼出售给乙公司。合同规定销售价格为3000万元,当月乙公司预付了1600万元,余款在以后两个月内结清。已知销售不动产的营业税税率为5%。甲公司3月应按“销售不动产”税目缴纳的营业税税额为()万元
下列争议中,诉讼时效期间为1年的是()。
公司未分配利润在利润中所占比例增大,社会消费曲线就会向下移动。
汇票只涉及出票人和收款人,本票涉及出票人、付款人和收款人三方当事人。()
在直角坐标系xOy中,以O为极点,x轴正半轴为极轴建立极坐标系.圆C1,直线C2的极坐标方程分别为ρ=4sinθ,ρcos(θ-)=2√2.设P为C1的圆心,Q为C1与C2交点连线的中点.已知直线PQ的参数方程为(t∈R为参数),求a,b的值.
ThestandardofficialretirementagetoqualifyforapublicpensioninmostOECDcountriesiscurrently65.Thechief【C1】______
最新回复
(
0
)