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
41
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] 【C14】
选项
A、due to
B、because
C、because of
D、and
答案
B
解析
本句前半句是承接上文的一种相反观点,后半句是支持这个观点的例子,由此可推断例子与观点之间是因果关系,选项B中的原因连词because符合题意。
转载请注明原文地址:https://tihaiku.com/zcyy/3804315.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
Drunkendriving—sometimescalledAmerican’ssociallyacceptedformofmurd
[originaltext]Mr.Wangisnotinnow.CanItakeamessageforhim?[/originalte
Morethan15millionAmericansundergosurgeryeachyear,butsomeelective
轴心抗压承载力相同的下列柱,截面积可做得最小的是( )。A.普通钢筋混凝土柱
高钾血症时血钾浓度应大于A.3.0mmol/L B.3.5mmol/L C.
张三投资某原油期权市场。当前价格是99$/桶。他购买了一种合约,该合约规定201
左边给定的是纸盒的外表面,下面哪一项能由它折叠而成? A.如上图所示 B.如
政府土地出让行为应计入政府财政收入。()
2013年7月19日10付息国债24(100024)净价为97.8685,应付利
根据《行政诉讼法》,当事人必须依法履行的发生法律效力的诉讼文书不包括( )。A.
最新回复
(
0
)