首页
登录
职称英语
Cells cannot remain alive outside certain limits of temperature, and much n
Cells cannot remain alive outside certain limits of temperature, and much n
游客
2024-10-16
0
管理
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】______ . [br] 【C12】
选项
A、But
B、However
C、Therefore
D、Meanwhile
答案
C
解析
由于前句提出了反例,指出传统的分类有不足之处。本句接着讲到更准确的分类。因此可推断它们之间是因果关系,所以选C。
转载请注明原文地址:https://tihaiku.com/zcyy/3804313.html
相关试题推荐
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchn
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchn
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchn
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchn
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchn
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchn
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchn
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchn
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchn
Cellscannotremainaliveoutsidecertainlimitsoftemperature,andmuchn
随机试题
Peopletendtocollectpossessions,sometimeswithoutbeingawareofdoings
Mostofhisfriendssaythathehasafacilepen,buthewouldratherpridehims
[originaltext]W:Pardonme,Mr.Brown,wherearethesevitaminslocated?M:You
有关试带法测尿白细胞,错误的叙述是A.大剂量先锋Ⅳ可使结果出现假阳性 B.不能
证券公司的从业人员利用因职务便利获取的内幕信息以外的其他未公开的信息,违反规定,
血红蛋白尿呈A.淡黄色 B.乳白色 C.酱油色 D.红色 E.黄褐色
以下不属于质量管理中的常用技术的是()A.列表法 B.分层法 C
阿昔洛韦A.具有单三氮唑结构的药物 B.具有喹啉羧酸结构的药物 C.具有咪唑
为确保政府财政承受能力,每一年全部PPP项目需要从预算中安排的支出占一般公共
在一项研究某药疗效的临床试验中,服用该药后治疗效果的指标表示为无效、好转、显效和
最新回复
(
0
)