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
18
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
Severalofthechemicalelementswereknowninprehistoric【C1】______.Oneo
______isNOTwrittenbyHenryWadsworthLongfellow.A、TheSongofHiawathaB、AnA
10只相同的电容器10uF/16V并联,其等效电容为()。A.10uF/16V
下列哪些情况属于下呼吸道梗阻A.气管及支气管内分泌物蓄积 B.支气管痉挛 C
A.微核试验 B.显性致死试验 C.细菌回复突变试验 D.骨髓染色体畸变试
加强社会公德建设的主要途径包括()。 A.大力加强社会公德教育 B.深入开展
能完全溶于pH2.0~9.0的缓冲液中的生物碱为A.水溶性生物碱 B.酸碱两性
2015年,我国规模以上电子信息产业企业个数6.08万家,其中电子信息制造企业1
下列各项中,不通过“其他货币资金”科目核算的有()。A.银行支票存款 B
价值工程中,不符合用户要求的功能称为不必要功能,包括( )。 A.辅助功能
最新回复
(
0
)