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
43
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】______ .
【C7】
选项
A、into
B、of
C、by
D、with
答案
A
解析
根据同源动词divide的用法,可以推出此处应该选择介词into与之搭配。
转载请注明原文地址:https://kaotiyun.com/show/KlmK777K
0
专业英语四级
相关试题推荐
I’vealreadytoldyouthatI’mgoingtobuyit,______.
Clothingmadeofplasticfibershascertainadvantagesover______madeofnaturalfiberslikecotton,wool,orsilk.
GreatasRussellwas,manyofhisideas______todayandarebeingmodifiedbytheworkofphilosophersofourtime.
Federaleffortstoaidminoritybusinessesbeganinthe1960’swhentheSmallBusinessAdministration(SBA)beganmakingfederal
Someteenagersharborageneralizedresentmentagainstsociety,which______themtherightsandprivilegesofadults,although
Mostyoungpeopleenjoysomeformofphysicalactivity.Itmaybewalking,cycling,orswimming,orinwinter,skatingorskiing
Fromchildhoodtooldage,wealluselanguageasameansofbroadeningourknowledgeofourselvesandtheworldaboutus.When.
Theevolutionofsexratiohasproduced,inmostplantsandanimalswithseparatesexes,approximatelyequalnumbersofmalesan
Heneverhesitatestomake______criticisms______areconsideredhelpfultoothers.
Peoplefromallwalksoflifetookpartinthedemonstration.Theunderlinedpartmeans______.
随机试题
心脏收缩力增强时,静脉回心血量增加,这主要是因为()(1999年)
采用伊红Y染色观察精子存活率,死亡精子的特点是
血心包压塞的重要病理是
室内正常环境条件下混凝土结构环境类别为()级。
规划编制机关违反《环境影响评价法》规定,组织环境影响评价时弄虚作假或者有失职行为,造成环境影响评价严重失实的,对直接负责的主管人员和其他责任人员,由上级机关或者监察机关依法给予()处分。
下列关于设计单位质量责任和义务的说法,正确的有()。
甲公司有关资料如下:(1)甲公司的利润表和资产负债表主要数据如下表所示。其中,2016年为实际值,2017年至2019年为预测值(其中资产负债表项目为期末值)。(2)甲公司2017年和2018年为高速成长时期,年增长率在6%~7%之间;2019年销售
军人:工程师
下列有关I/O编址方式的描述中,正确的是()。
DNS协议实现的基本功能是()。
最新回复
(
0
)