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
2023-11-15
35
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/3189754.html
相关试题推荐
It______toseesomanychildreninthatmountainousareacannotevenaffordelem
Themanstopstotakehisdogoutsidetodoexercisebecause[br][originaltext
Themanstopstotakehisdogoutsidetodoexercisebecause[originaltext]M:Th
Withoutfacts,wecannotformacorrectopinionforweneedtohavefactualknow
Somepeopleeither______avoidquestionsofrightandwrongorjustremainneutra
Annawasreadingapieceofsciencefiction,completely______totheoutsideworl
Themandidn’tputhisluggageoutsidethedoorontimebecause______.[br][o
Afindinginrecentyearsshowsthatmencannotmanufacturebloodasefficie
Afindinginrecentyearsshowsthatmencannotmanufacturebloodasefficie
Afindinginrecentyearsshowsthatmencannotmanufacturebloodasefficie
随机试题
Theschoolcommitteehopedthattheirchoiceofplaywouldbe______withthest
Boys’schoolsaretheperfectplacetoteachyoungmentoexpresstheiremot
[originaltext]W:DepartmentofArt,DesignandMedia.CanIhelpyou?M:Yes.I
乌尔姆设计学院的校长马尔多纳多认为设计应该、而且必然是理性的、科学的、技术的,他
完整性约束有哪几种子句?()A.主键子句 B.检查子句 C.外键子句 D.
下列各项,不属于内伤咳嗽的是A.痰热咳嗽 B.痰湿咳嗽 C.气虚咳嗽 D.
基金管理人应当建立清晰的报告系统,体现了内部控制中()的重要性。A.信息沟通
以下关于基金会计核算的特点,表述不正确的是()。A.为了提高核算效率,同一
期货公司对期货从业人员发出违法违规指令的,期货从业人员应当( )。A.及时按照
询价采购的适用范围包括( )。A.永久设备 B.市场竞争不激烈的货物 C.设
最新回复
(
0
)