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
42
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] 【C15】
选项
A、However
B、On the other hand
C、Furthermore
D、For example
答案
C
解析
前句提到即便新的分类也不充分,接着举例说明。本句是第二个例子,与前句形成递进关系,所以选项C正确。
转载请注明原文地址:https://tihaiku.com/zcyy/3804316.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
Itisgenerallynot________forexpectantmotherstotravelbyairafterthe28
[originaltext]SomestudentsattheOpenUniversityleftschool20yearsago
Asavolunteer,JohnApollosislosingweight—theold-fashionedway—byeatin
根据ANSI/IEEE829标准,()属于《测试案例说明》中的内容。①
按随证取穴原则:外感风寒型感冒用哪个穴位最合适A.手三里 B.足三里 C.大
膀胱炎约占尿路感染的60%以上,致病菌多为()。A:奈瑟淋病双球菌 B:大肠
在一个一般均衡的市场中,每个单独的市场未必能实现局部均衡。()
A.浙江、江西、福建 B.广西、云南、广东 C.俄罗斯、新疆北部 D.黑龙
某工程网络计划中,B工作的最早开始时间和最早完成时间分别为第5天和第7天,最迟开
根据《建设工程质量管理条例》,必须实行监理的建设工程有()。A.国家重点建
最新回复
(
0
)