首页
登录
职称英语
Cells cannot remain alive outside certain limits of temperature and much na
Cells cannot remain alive outside certain limits of temperature and much na
游客
2023-12-04
23
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 with a narrow range around 37℃; a departure【M1】______
of a few degrees from this value serious impairs their functioning.【M2】______
Even though cells can survive wider fluctuations the integrated
actions of bodily systems are impaired. Other animals have a wide【M3】______
tolerance for changes of bodily temperature.
For century it has been recognized that mammals and birds【M4】______
differ other animals in the way they regulate body temperature.【M5】______
Ways of characterizing the difference have become more accurate
and meaningful over time, but popular terminology still reflects an【M6】______
old division into " warm-blooded" and " cold-blooded" species;
warm-blooded included mammals and birds whereas all other
creatures were considered cold-blooded. As more species were
studied, it became evident that this classification was adequate. A【M7】______
cold-blooded fence lizard usually has a body temperature only a
degree or two below those of humans and so is not cold. Therefore【M8】______
the next distinction was taken between animals that maintain a【M9】______
constant body temperature, called homeotherms, and those whose
body temperature varies with their environments, called
poikilotherms. But this classification was also proved inadequate,【M10】______
because among mammals there are many that vary their body
temperatures during hibernation. Furthermore, many invertebrates
that live in the depths of the ocean never experience change in the
depths of the ocean, and their body temperatures remain constant. [br] 【M4】
选项
答案
century一centuries
解析
词汇错误。For centuries是固定短语,意为“几个世纪以来”。
转载请注明原文地址:https://tihaiku.com/zcyy/3242943.html
相关试题推荐
Evenahalf-heartedonlookercannothelpbutrealizethatinthisfast-pace
Evenahalf-heartedonlookercannothelpbutrealizethatinthisfast-pace
Evenahalf-heartedonlookercannothelpbutrealizethatinthisfast-pace
Evenahalf-heartedonlookercannothelpbutrealizethatinthisfast-pace
Evenahalf-heartedonlookercannothelpbutrealizethatinthisfast-pace
Haveyouevernoticedacertainsimilarityinpublicparksandbackgardens
Haveyouevernoticedacertainsimilarityinpublicparksandbackgardens
Haveyouevernoticedacertainsimilarityinpublicparksandbackgardens
Haveyouevernoticedacertainsimilarityinpublicparksandbackgardens
Thebombthatexplodedoutsidethepolicestation[br][originaltext]Acar
随机试题
WhenLauraLangankifoundextratowelsinthelaundrysmellinglemonyfresh
ShoppricesinJunefellatthefastest【C1】______ratesinceatleast2006as
Theauthor’sattitudetowardsthecurrentsituationintheexploitationofnatur
H2(g)和O2(g)在绝热钢瓶中反应生成水,则( )。A.ΔH=0 B.Δ
善意占有属于( )。A.合法占有 B.非法占有 C.自主占有 D.所有人
2008年以后,面对全球金融危机带来的不利影响,基金业进行了积极的改革和探索,不
皮质醇增多症最常见的病因是A.药源性皮质醇增多症B.原发性肾上腺皮质腺瘤C.异源
资产证券化风险暴露是指商业银行因从事资产证券化业务而形成的表内外风险暴露,包括但
某国内药品生产企业生产碳青霉烯类抗菌药物(特殊使用级),该药品是目前抗菌谱最广,
施工质量事故报告和调查处理的程序包括()。A.事故调查及事故原因分析 B.事
最新回复
(
0
)